JPH07250232A - Facsimile communication equipment and its control method - Google Patents

Abstract

PURPOSE:To set the performance of an entire system at an optimum value by setting the command waiting time of a hand shake procedure to be conducted by an interface means at any value optimum for a highorder control unit. CONSTITUTION:When a 'group 3 parameter setting request command' is received from a high-order control unit FCU, a communication control unit CCU reloads the value of minimum guarantee time and the value of hand shake time in a group 3 parameter previously stored in a SRAM 14 corresponding to the minimum guarantee time contained in that command and the hand shake time expressing the command waiting time corresponding to N kinds of commands. Next, the communication control unit CCU transmits a 'group 3 parameter setting confirmation response' containing an information expressing the version number of a ROM 12 to the high-order control unit FCU. Then, the high-order control unit FCU recognizes a communicating function to be presented by the communication control unit CCU.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention is at least group 3
The present invention relates to a method for controlling a facsimile communication device including a communication control unit having a facsimile communication function and a host control unit having at least an image data creating function.

[0002]

2. Description of the Related Art Generally, a facsimile machine is constructed as a single unit and functions as one independent machine. Further, as a plotter for recording an image, there is a model to which a device capable of recording an image with high image quality such as a laser printer is applied.

On the other hand, in business establishments in which a data processing device such as a personal computer is installed, a scanner or a printer is often connected as an input / output device. In many cases, facsimile machines are installed and operated in such business establishments.

As described above, installing a plurality of devices having the same function in the same business place increases costs. Therefore, conventionally, one having a facsimile function and a printer function, one having a facsimile function and a copying machine function, or one having a facsimile function, a printer function, and a copying machine function has been put into practical use as a composite model. When such a complex model is used, it is possible to reduce the facility cost at a business office.

Conventionally, such a composite model has been designed and manufactured independently of each other so that each composite machine can operate in an optimum state.
Since all of them are newly designed for each model, the device cost becomes large when considered as a single device.

Therefore, for example, a communication control unit having a facsimile communication function and image data creation / recording /
If the device is divided into a higher-level control unit having a higher-level processing function such as storage and the communication control unit is commonly used by a plurality of models, at least the communication control unit can be realized universally. The cost can be reduced, and the cost of the entire device can be reduced.

[0007]

However, such a conventional device has the following disadvantages.

That is, when the device is divided into a communication control unit and a host control unit, it goes without saying that an interface means for exchanging data between them is required.

On the other hand, the performance of the host control unit depends on the system configuration of the model to be configured, the functional elements (eg CPU (central processing unit), etc.
I / O ports, etc.) and thus the response time of the interface function with the communication control unit also varies.

For this reason, it is necessary to set a wide response time that the interface means can handle, and as a result, the capacity of the entire apparatus may be limited by the performance of the interface means, and the communication control unit can be In some cases, the system performance of the applied device may not be as high as expected.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a facsimile communication apparatus and a control method therefor capable of optimizing the system performance of the entire apparatus.

[0012]

The present invention provides a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function. DPRAM for bidirectionally exchanging data between the host control unit and the host control unit, command data sent from the host control unit to the communication control unit, and the host control unit from the communication control unit Response data to be sent to the device via the DPRAM in a predetermined handshake procedure, and in the handshake procedure, interface means capable of setting command data reception waiting time of the communication control unit in multiple stages , Above Control unit, to said interface means, said waiting time, in which a control means for setting one of the values the interface means is configurable.

Further, in a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, between the communication control unit and the host control unit. DPRAM for bidirectionally exchanging data, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit. , DP above
The host controller includes interface means for exchanging data via a RAM in a predetermined handshake procedure, and in the handshake procedure, a waiting time for receiving command data of the communication control unit can be set within a predetermined range. Against the means
Control means is provided for setting the waiting time to an arbitrary value within the predetermined range settable by the interface means.

Further, in a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, between the communication control unit and the host control unit. DPRAM for bidirectionally exchanging data, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit. , DP above
An interface means is provided for exchanging in a predetermined handshake procedure via the RAM, and in the handshake procedure, the reception waiting time of the command data of the communication control unit can be set within a predetermined range according to the type of each command data. The upper control unit provides the interface means with a plurality of waiting times according to the type of each command data.
The interface means is provided with a control means for setting an arbitrary value within the predetermined range.

Further, in a method of controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit and the host control unit. DPRAM for bidirectionally exchanging data to and from, command data sent from the upper control unit to the communication control unit, and sent from the communication control unit to the higher control unit. An interface means for exchanging response data through the DPRAM in a predetermined handshake procedure is provided, and the upper control unit, via the interface means, has a parameter necessary for a preset group 3 facsimile communication function. The value is obtained to notify to the communication control unit.

Further, in a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, between the communication control unit and the host control unit. DPRAM for bidirectionally exchanging data, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit. , DP above
An interface means is provided for exchanging in a predetermined handshake procedure via the RAM, and in the handshake procedure, the reception waiting time of the command data of the communication control unit can be set within a predetermined range according to the type of each command data. The upper control unit provides the interface means with a plurality of waiting times according to the type of each command data.
The communication means is set to an arbitrary value within the predetermined range that can be set by the interface means, and the value of the parameter required for the preset group 3 facsimile communication function is notified to the communication control unit via the interface means. It is provided with a control means for controlling.

Further, in a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit is connected to the host control unit. DPRAM for bidirectionally exchanging data, command data received from the upper control unit, and response data sent to the upper control unit
The upper control unit is provided with interface means capable of exchanging in a predetermined handshake procedure via the PRAM and setting the command data reception waiting time in the handshake procedure in multiple stages. The control means is provided for setting the waiting time to any value that can be set by the interface means.

Further, in a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit is connected to the host control unit. DPRAM for bidirectional data exchange, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit Through the DPRAM in a predetermined handshake procedure, and in the handshake procedure, there is provided interface means capable of setting a command data reception waiting time of the communication control unit within a predetermined range. , With respect to the interface means, the waiting time, in which a control means for setting to an arbitrary value within the predetermined range the interface means can be set.

Further, in a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit is connected to the host control unit. DPRAM for bidirectional data exchange, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit Via the DPRAM in a predetermined handshake procedure, and in the handshake procedure, the command data reception waiting time of the communication control unit can be set within a predetermined range according to the type of each command data. Interface The upper control unit has a plurality of waiting times according to the type of each command data for the interface means to an arbitrary value within the predetermined range settable by the interface means. The control means for setting is provided.

Further, in a method of controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit is the host control unit. DPRAM for bidirectionally exchanging data with the unit, command data sent from the upper control unit to the communication control unit, and sent from the communication control unit to the higher control unit Interface means for exchanging the response data to be transmitted through the DPRAM in a predetermined handshake procedure, and the upper control unit, via the interface means, sets the parameters required for a preset group 3 facsimile communication function. The value is obtained to notify to the communication control unit.

Further, in a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit is connected to the host control unit. DPRAM for bidirectional data exchange, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit Via the DPRAM in a predetermined handshake procedure, and in the handshake procedure, the command data reception waiting time of the communication control unit can be set within a predetermined range according to the type of each command data. Interface The upper control unit has a plurality of waiting times according to the type of each command data for the interface means to an arbitrary value within the predetermined range settable by the interface means. Group 3 which is set and preset through the above interface means
The communication control unit is provided with control means for notifying the values of the parameters required for the facsimile communication function.

Further, in a method of controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit and the host control unit. DPRAM for bidirectionally exchanging data to and from, command data sent from the upper control unit to the communication control unit, and sent from the communication control unit to the higher control unit. The response data is exchanged through the DPRAM in a predetermined handshake procedure, and in the handshake procedure, the reception waiting time of the command data of the communication control unit is set within a predetermined range according to the type of each command data. Possible The higher-order control unit is provided with an interface means, and the higher-order control unit sets, for the interface means, a plurality of the waiting times according to the respective types of command data to arbitrary values within the predetermined range settable by the interface means. The communication control unit is provided with control means for setting and notifying the value of the parameter required for the preset group 3 facsimile communication function to the communication control unit via the interface means, wherein the communication control unit is the upper control unit. On the basis of the value of the above-mentioned parameter notified from, the reception capability information to be notified to the partner terminal at the time of receiving the image information is formed.

Further, in a method of controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit is the host control unit. DPRAM for bidirectionally exchanging data with the unit, command data sent from the upper control unit to the communication control unit, and sent from the communication control unit to the higher control unit Response data to be transmitted through the DPRAM in a predetermined handshake procedure, and in the handshake procedure, the reception waiting time of the command data of the communication control unit is within a predetermined range according to the type of each command data. Can be set The upper control unit has a plurality of waiting times according to the type of each command data for the interface means, and the upper control unit can set an arbitrary value within the predetermined range by the interface means. And a control means for notifying the communication control unit of the value of a parameter required for a preset group 3 facsimile communication function via the interface means, and the communication control unit is provided with the upper control. Based on the value of the parameter notified from the unit, the reception capability information to be notified to the partner terminal when receiving the image information is formed.

Further, in a method of controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit and the host control unit. DPRAM for bidirectionally exchanging data to and from, command data sent from the upper control unit to the communication control unit, and sent from the communication control unit to the higher control unit. The response data is exchanged through the DPRAM in a predetermined handshake procedure, and in the handshake procedure, the reception waiting time of the command data of the communication control unit is set within a predetermined range according to the type of each command data. Possible The higher-order control unit is provided with an interface means, and the higher-order control unit sets, for the interface means, a plurality of the waiting times according to the respective types of command data to arbitrary values within the predetermined range settable by the interface means. The communication control unit is provided with control means for setting and for notifying the communication control unit of the value of the parameter required for the preset group 3 facsimile communication function via the interface means. The transmission function applied at that time is set based on the value of the parameter notified from the upper control unit and the reception capability information notified from the partner terminal.

Also, in a method of controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit is the host control unit. DPRAM for bidirectionally exchanging data with the unit, command data sent from the upper control unit to the communication control unit, and sent from the communication control unit to the higher control unit Response data to be transmitted through the DPRAM in a predetermined handshake procedure, and in the handshake procedure, the reception waiting time of the command data of the communication control unit is within a predetermined range according to the type of each command data. Can be set The upper control unit has a plurality of waiting times according to the type of each command data for the interface means, and the upper control unit can set an arbitrary value within the predetermined range by the interface means. And a control means for notifying the communication control unit of the values of the parameters required for the preset group 3 facsimile communication function via the interface means, and when the image information is transmitted, the communication control unit is provided. The transmission function applied at that time is set based on the value of the parameter notified from the upper control unit and the reception capability information notified from the partner terminal.

In a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, data between the communication control unit and the host control unit DPRAM for bidirectional communication, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit, DPRAM
Through a predetermined handshake procedure, and in the handshake procedure, interface means capable of setting the command data reception waiting time of the communication control unit in multiple stages, the upper control unit On the other hand, there is provided a control means for setting the waiting time to a value preset among the values that can be set by the interface means, corresponding to the device function of the host control unit. .

Further, in a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, between the communication control unit and the host control unit. DPRAM for bidirectionally exchanging data, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit. , DP above
The host controller includes interface means for exchanging data via a RAM in a predetermined handshake procedure, and in the handshake procedure, a waiting time for receiving command data of the communication control unit can be set within a predetermined range. Against the means
Control means is provided for setting the waiting time to a value that is set in advance corresponding to the device function of the host control unit and within the predetermined range that can be set by the interface means. .

Further, in a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, a communication control unit between the communication control unit and the host control unit is provided. DPRAM for bidirectionally exchanging data, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit. , DP above
An interface means is provided for exchanging in a predetermined handshake procedure via the RAM, and in the handshake procedure, the reception waiting time of the command data of the communication control unit can be set within a predetermined range according to the type of each command data. The upper control unit provides the interface means with a plurality of waiting times according to the type of each command data.
A control means is provided for setting a value that is set in advance corresponding to the device function of the host control unit and within the predetermined range that can be set by the interface means.

Further, in a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, a communication control unit between the communication control unit and the host control unit is provided. DPRAM for bidirectionally exchanging data, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit. , DP above
An interface means is provided for exchanging in a predetermined handshake procedure via the RAM, and in the handshake procedure, the reception waiting time of the command data of the communication control unit can be set within a predetermined range according to the type of each command data. The upper control unit provides the interface means with a plurality of waiting times according to the type of each command data.
It is set to a value that is set in advance corresponding to the device function of the host control unit, and is set to a value within the predetermined range that can be set by the interface means, and is also set in advance through the interface means. The control means is provided for notifying the communication control unit of the values of the parameters required for the group 3 facsimile communication function.

Further, in a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit is connected to the host control unit. DPRAM for bidirectionally exchanging data, command data received from the upper control unit, and response data sent to the upper control unit
The upper control unit is provided with interface means capable of exchanging in a predetermined handshake procedure via the PRAM and setting the command data reception waiting time in the handshake procedure in multiple stages. There is provided a control means for setting the waiting time to a value preset among the values that can be set by the interface means, corresponding to the device function of the host control unit.

Further, in a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit is connected to the host control unit. DPRAM for bidirectional data exchange, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit Through the DPRAM in a predetermined handshake procedure, and in the handshake procedure, there is provided interface means capable of setting a command data reception waiting time of the communication control unit within a predetermined range. , Setting the waiting time for the interface means to a value set in advance corresponding to the device function of the host control unit and within the predetermined range settable by the interface means. It is provided with a control means.

Further, in a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit is connected to the host control unit. DPRAM for bidirectional data exchange, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit Via the DPRAM in a predetermined handshake procedure, and in the handshake procedure, the command data reception waiting time of the communication control unit can be set within a predetermined range according to the type of each command data. Interface The upper control unit has a plurality of waiting times according to the type of command data for each of the interface means and is preset in the interface means in accordance with the device configuration of the upper control unit. A control means for setting the value to a value within the predetermined range that can be set by the interface means is provided.

Further, in a facsimile communication apparatus including a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit is connected to the host control unit. DPRAM for bidirectional data exchange, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit Via the DPRAM in a predetermined handshake procedure, and in the handshake procedure, the command data reception waiting time of the communication control unit can be set within a predetermined range according to the type of each command data. Interface And a plurality of waiting times corresponding to respective command data types for the interface means are preset in the upper control unit corresponding to the device functions of the upper control unit. And a value within a predetermined range that can be set by the interface means, and the value of a parameter required for a preset group 3 facsimile communication function is set via the interface means. The control means for notifying the unit is provided.

A method of controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, wherein the communication control unit and the host control unit are provided. DPRAM for bidirectionally exchanging data to and from, command data sent from the upper control unit to the communication control unit, and sent from the communication control unit to the higher control unit. The response data is exchanged through the DPRAM in a predetermined handshake procedure, and in the handshake procedure, the reception waiting time of the command data of the communication control unit is set within a predetermined range according to the type of each command data. Possible The upper control unit is provided with interface means, and the plurality of waiting times corresponding to the respective command data types are preset in the upper control unit corresponding to the device functions of the upper control unit. And a value within a predetermined range that can be set by the interface means, and the value of a parameter required for a preset group 3 facsimile communication function is set via the interface means. A control means for notifying the unit, wherein the communication control unit is configured to form reception capability information to be notified to a partner terminal when receiving image information, based on the value of the parameter notified from the upper control unit. Is.

Further, in a method of controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit is the host control unit. DPRAM for bidirectionally exchanging data with the unit, command data sent from the upper control unit to the communication control unit, and sent from the communication control unit to the higher control unit Response data to be transmitted through the DPRAM in a predetermined handshake procedure, and in the handshake procedure, the reception waiting time of the command data of the communication control unit is within a predetermined range according to the type of each command data. Can be set The upper control unit has a plurality of waiting times according to the type of each command data set in advance for the interface means in accordance with the device function of the upper control unit. And a value within the predetermined range that can be set by the interface means, and through the interface means,
The communication control unit includes control means for notifying the communication control unit of the value of the parameter required for the preset group 3 facsimile communication function, and the communication control unit is based on the value of the parameter notified from the host control unit. The reception capability information to be notified to the other terminal at the time of receiving the image information is formed.

A method of controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit and the host control unit. DPRAM for bidirectionally exchanging data to and from, command data sent from the upper control unit to the communication control unit, and sent from the communication control unit to the higher control unit. The response data is exchanged through the DPRAM in a predetermined handshake procedure, and in the handshake procedure, the reception waiting time of the command data of the communication control unit is set within a predetermined range according to the type of each command data. Possible An interface means is provided, and the upper control unit sets a plurality of waiting times for the interface means, each of which has a plurality of waiting times according to the type of command data. And the value of the parameter necessary for the preset group 3 facsimile communication function is set to a value within the predetermined range that can be set by the interface means, via the interface means. In the transmission of image information, the communication control unit, based on the value of the parameter notified from the higher-order control unit and the reception capability information notified from the partner terminal, at that time, The transmission function to be applied is set.

Further, in a method of controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and an upper control unit having at least an image data creating function, the communication control unit is the upper control unit. DPRAM for bidirectionally exchanging data with the unit, command data sent from the upper control unit to the communication control unit, and sent from the communication control unit to the higher control unit Response data to be transmitted through the DPRAM in a predetermined handshake procedure, and in the handshake procedure, the reception waiting time of the command data of the communication control unit is within a predetermined range according to the type of each command data. Can be set The upper control unit has a plurality of waiting times according to the type of each command data set in advance for the interface means in accordance with the device function of the upper control unit. And a value within the predetermined range that can be set by the interface means, and the value of the parameter required for the preset group 3 facsimile communication function is transmitted via the interface means. A control means for notifying the control unit is provided, and at the time of image information transmission, the communication control unit, based on the value of the parameter notified from the upper control unit, and the reception capability information notified from the partner terminal, The transmission function that is sometimes applied is set.

[0038]

Therefore, the command waiting time in the handshake procedure executed by the interface means can be set to an optimum value for the host control unit, so that the performance of the entire system can be set to an optimum value.

Further, since the content of the reception capability information to be notified to the partner terminal at the time of reception is set by referring to the value of the parameter notified from the host control unit, the appropriate image information corresponding to the device function of the host control unit is set. Can receive.

Since the transmission function for notifying the partner terminal is set based on the parameter value notified by the host control unit and the content of the reception capability information notified by the partner terminal, Appropriate image information transmission corresponding to the device function can be performed.

When the communication control unit includes the interface means, the command waiting time in the handshake procedure executed by the interface means can be set to an optimum value for the host control unit, so that the performance of the entire system is optimized. Can be set to a value.

Further, when the communication control unit includes the interface means, the content of the reception capability information to be notified to the partner terminal at the time of reception is set by referring to the value of the parameter notified from the higher control unit. It is possible to properly receive image information corresponding to the device function of.

Further, when the communication control unit includes the interface means, the transmission function for notifying the partner terminal based on the value of the parameter notified by the host control unit and the content of the reception capability information notified by the partner terminal is provided. Since the setting is made, it is possible to perform appropriate image information transmission corresponding to the device function of the host control unit.

Further, the command waiting time in the handshake procedure executed by the interface means is set in advance corresponding to the device function of the host control unit and can be set to an optimum value for the host control unit. The overall performance can be set to the optimum value.

Further, when the communication control unit includes the interface means, the command waiting time in the handshake procedure executed by the interface means is preset in correspondence with the device function of the host control unit, and is optimal for the host control unit. Since it can be set to a value, the performance of the entire system can be set to an optimum value.

[0046]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 shows a group 3 facsimile apparatus according to an embodiment of the present invention.

This group 3 facsimile apparatus has an interface function between the host control unit FCU having image data creation / recording / storage / communication management / upper communication functions and the group 3 facsimile communication function and the upper control unit FCU. It is composed of two communication control units CCU provided with (interface means).

In the upper control unit FCU, the CPU
A (central processing unit) 1 controls the operation of the higher-level control unit FCU to realize the operation function of the group 3 facsimile machine, and a ROM (read only memory) 2 controls the CPU 1 to execute. It stores various data necessary for executing the program and its control program, and RAM (random access
The memory 3 constitutes a work area required when the CPU 1 operates.

The clock circuit 4 outputs the current date and time information, the operation display section 5 is for the user to operate the group 3 facsimile apparatus, and the scanner 6 has a predetermined resolution for the original image. The plotter 7 records and outputs an image at a predetermined resolution.

The magnetic disk device 8 saves various data such as image data, and also saves data of application programs and system programs executed by the CPU 1 and various parameters unique to the group 3 facsimile machine. . Here, as the parameters, for example, communication parameters such as minimum recording guarantee time (I / O time) per line, parameters related to the installation location such as country code information representing the country of the installation location, command handshake wait time, etc. There are system capability parameters and the like set in advance corresponding to the device functions of.

These CPU1, ROM2, RAM3,
Clock circuit 4, operation display unit 5, scanner 6, plotter 7,
Also, the magnetic disk device 8 is connected to the internal bus 9, and data exchange between these elements is mainly executed via this internal bus 9.

Here, the handshake waiting time for each command is mainly the one-cycle execution speed of the CPU1 of the host control unit FCU, the access speed of the ROM2 and RAM3, the data transfer capacity of the internal bus 9 (including DMA transfer), etc. And a software factor such as a response time of basic software (for example, a real-time multitasking operating system) for controlling the operation of the host control unit FCU. It is also determined by the degree of real-time property required for each command type.

In the communication control unit, a CPU (central processing unit) 11 controls the operation of the communication control unit CCU to realize a group 3 facsimile communication function, and a ROM (read only memory) 12
Stores a control program executed by the CPU 11 and various data necessary for executing the control program. The RAM (random access memory) 13 is a work area required when the CPU 11 operates. The SRAM (static RAM) 14 is for storing data such as various parameters referred to during communication of the group 3 facsimile apparatus and various parameters necessary for the interface function.

The clock circuit 15 outputs the current date and time information, and the encoding / decoding unit 16 encodes and compresses the image signal and decodes the encoded and compressed image information into the original image signal. It is to turn into.

The group 3 facsimile modem 17 is for realizing the modem function of the group 3 facsimile, and has a low speed modem function (V.21 modem) for exchanging transmission procedure signals and mainly exchanging image information. High-speed modem function (V.33 modem,
V. 29 modem, V.29. 27ter modem etc.).

The network control device 18 is for connecting the facsimile device to a public telephone line network, and has an automatic transmission / reception function. A DPRAM (dual port RAM) 19 is a functional element that has two input / output terminals and can appropriately access the internal area from these two input / output terminals, and is used for exchanging data in the interface function. Realize the area. This DPRA
One input / output terminal of M19 is connected to the internal bus 9 of the upper control unit FCU.

CPU 11, ROM 12, RAM
13, SRAM 14, clock circuit 15, encoding / decoding unit 1
6, group 3 facsimile modem 17, network control device 1
8 and the DPRAM 19 are connected to the internal bus 20, and data exchange between these respective elements is mainly performed via this internal bus 20. Further, the data exchange between the group 3 facsimile modem 17 and the network control device 18 is performed directly.

As the functional elements of the ROMs 2 and 12, mask ROMs, EPROMs, EEPROMs, or flash ROMs are used. RAM
3 and 13 are generally DRAM (dynamic RA
M) is used. Further, by backing up the SRAM 14 with a battery, data can be saved even when the power is turned off.

The storage area of the DPRAM 19 is shown in FIG.
As shown in (a), a data buffer area, a command data area, a response data area, a data buffer table, an FCU status area, a CCU status area,
It is divided into an FCU interruption factor area, a CCU interruption factor area, an FCU interruption execution area, and a CCU interruption execution area.

The data buffer area temporarily holds transmission image data transmitted from the upper control unit FCU to the communication control unit CCU and reception image data transmitted from the communication control unit CCU to the higher control unit FCU. . Further, in this case, the data buffer area can be divided into two as shown in FIG. 7B or divided into four as shown in FIG. Here, when the data buffer area is divided into two, a so-called double buffer function is realized and high-speed data transfer becomes possible. Further, when the data buffer area is divided into four, two sets of double buffers can be secured, and for example, it can be applied to multiplex communication in which two communication processes are executed in parallel with a partner terminal. You can

The command data area is for holding command data output from the upper control unit FCU to the communication control unit CCU. Data can be written from the upper control unit FCU and the communication control unit CCU is available. Is set to an area where data can be read.

The response data area is for holding command data output from the communication control unit CCU to the upper control unit FCU. Data can be read from the higher control unit FCU and the communication control unit CCU is available. Is set to the area where data can be written.

The data buffer table stores a division mode of the data buffer area and information necessary for accessing the divided data buffer area. That is, the data buffer table is made up of four reference tables as shown in FIG. 7D, and each reference table has the start address of the divided data buffer area as shown in FIG. And the buffer size. Here, the reference table # 1 is the data buffer # 1.
Of the data buffer # 2, reference table # 2 represents the start address and buffer size of the data buffer # 2, reference table # 3 represents the start address and buffer size of the data buffer # 3, and reference table # 2 4 represents the start address and buffer size of the data buffer # 4. If the data buffer area is not divided, reference table #
No valid data is stored in Nos. 2, # 3 and # 4, and if the data buffer area is divided into two, no valid data is stored in the reference tables # 3 and # 4. This data buffer table is used by the upper control unit FCU.
Data can be read from the communication control unit C
It is set in an area where data can be written and read from the CU.

The FCU status area is for holding status data indicating the state of the upper control unit FCU (for example, plotter error, memory full, etc.), and data can be written from the upper control unit FCU. , Is set in an area where data can be read from the communication control unit CCU.

The CCU status area holds status data representing the state of the communication control unit CCU (for example, reset request), and data can be read from the upper control unit FCU and can be read from the communication control unit CCU. Is set in a data writable area.

The FCU interrupt factor area contains interrupt factor data for designating whether the data output from the upper control unit FCU to the communication control unit CCU is transmission image data or command data, and response data. It is for holding the interrupt factor data for responding to the received confirmation, and is set in an area where data can be written from the upper control unit FCU and data can be read from the communication control unit CCU. .

The CCU interrupt factor area contains interrupt factor data for designating whether the data output from the communication control unit CCU to the upper control unit FCU is received image data or response data, and command data. It is for holding the interrupt factor data for responding to the received confirmation, and is set in an area where data can be written from the communication control unit CCU and data can be read from the host control unit FCU. .

Here, in the interrupt factor data, as shown in FIG. 3A, the interrupt factor is the transfer of image data (transmission image data and reception image data) or the transmission of a command / response. It consists of an interrupt type to identify whether it is a command confirmation response or a response confirmation response, and an interrupt parameter that indicates which data buffer in the data buffer area was accessed when the interrupt factor is image data transfer. .

The interrupt parameter is composed of 4-bit data, as shown in FIG. 7B, where bit 1 corresponds to data buffer # 1, bit 2 corresponds to data buffer # 2, Bit 3 corresponds to data buffer # 3, and bit 4 corresponds to data buffer # 4.

For example, when the data buffer area is divided into the data buffers # 1 and # 2, the upper control unit FCU has the data buffer # 1 and the data buffer # 2.
When the transmission image data is set to, the data “1” is set in the bit 1 and the bit 2 of the interrupt factor parameter as shown in FIG. In this state, when the communication control unit CCU reads data from the data buffer # 1, the interrupt factor parameter is as shown in FIG.
, Bit 1 is set to data "0" and bit 2 is set to data "1".

As a result, the upper control unit FCU is
It can be determined that the communication control unit CCU has read the data from the data buffer # 1.

The FCU interrupt activation area is an area for the upper control unit FCU to write predetermined data to the communication control unit CCU, which indicates that data is to be transmitted. The area is writable and data can be read from the communication control unit CCU. Also, when predetermined data is written in the FCU interrupt activation area, DPRAM1
From 9, an FCU data transfer request interrupt signal is output to the CPU 11 of the communication control unit CCU. This F
The CU data transfer interrupt request signal is transmitted to the communication control unit CC.
It is stopped when U reads the data from the FCU interrupt activation area.

The CCU interrupt activation area is an area for writing predetermined data indicating that data is transmitted from the communication control unit CCU to the upper control unit FCU, and data can be written from the communication control unit CCU. Thus, the area is set so that data can be read from the upper control unit FCU. When predetermined data is written in the CCU interrupt activation area, a CCU data transfer request interrupt signal is output to the CPU 1 of the upper control unit FCU. The CCU data transfer request interrupt signal is stopped when the upper control unit FCU reads the data from the CCU interrupt activation area.

Now, the handshake procedure of the interface means between the upper control unit FCU and the communication control unit CCU will be described.

When the host control unit FCU sends any command to the communication control unit CCU, the host control unit FCU first writes the command data to be sent to the command data area of the DPRAM 19 and sets it as an interrupt type. The interrupt factor data indicating that the command is transmitted is written in the FCU interrupt factor area of the DPRAM 19, and the predetermined interrupt trigger data is written in the DPRAM 19
Write to the FCU interrupt activation area of.

As a result, the FRAM data transfer request interrupt signal is output from the DPRAM 19 to the CPU 11 of the communication control unit CCU, and the communication control unit CCU (of the CPU 11 thereof) firstly sends the DPRAM 19 to the DPRAM 19.
The data is read from the FCU interrupt activation area. As a result, the FCU data transfer request interrupt signal output from the DPRAM 19 is stopped.

Then, the communication control unit CCU
The interrupt factor data is read from the FCU interrupt factor area of the RAM 19, and it is determined whether the interrupt factor at that time is command transmission, image data transfer, or response confirmation response. In this case, since the interrupt factor is the command transmission, the communication control unit CCU reads the command data from the command data area of the DPRAM 19.

At the same time, the communication control unit CCU
Writes the interrupt factor data indicating that it is a command confirmation response as the interrupt type into the CCU interrupt factor area of the DPRAM 19, and sets the predetermined data to the CC of the DPRAM 19.
Write to the U interrupt activation area.

As a result, the DPRAM 19 outputs a CCU data transfer request interrupt signal to the CPU 1 of the upper control unit FCU, whereby the upper control unit FCU (the CPU 1 thereof) first outputs the C of the DPRAM 19
Data is read from the CU interrupt activation area. As a result, the CCU transfer request interrupt signal output from the DPRAM 19 is stopped.

Next, the upper control unit FCU
The interrupt factor data is read from the CCU interrupt factor area of the RAM 19 and it is determined whether the interrupt factor at that time is response transmission, image data transfer, or command confirmation response. In this case, since the interrupt factor is the command confirmation response, the upper control unit FCU determines that the command sent immediately before has been normally taken in by the communication control unit CCU, and shifts to the next operation.

When the communication control unit CCU sends the response data to the upper control unit FCU, the following procedure is executed.

First, the communication control unit CCU writes the response data to be sent to the response data area of the DPRAM 19, and sets the interrupt factor data indicating that the response is sent as the interrupt type, to the C of the DPRAM 19.
Write to the CU interrupt factor area, and write predetermined interrupt activation data to the CCU interrupt activation area of the DPRAM 19.

As a result, the DPRAM 19 outputs a CCU data transfer request interrupt signal to the CPU 1 of the higher-order control unit FCU, whereby the upper-order control unit FCU (the CPU 1 thereof) first sends the C of the DPRAM 19
Data is read from the CU interrupt activation area. As a result, the CCU data transfer request interrupt signal output from the DPRAM 19 is stopped.

Then, the upper control unit FCU
The interrupt factor data is read from the CCU interrupt factor area of the RAM 19 and it is determined whether the interrupt factor at that time is response transmission, image data transfer, or command confirmation response. In this case, since the interrupt factor is the response transmission, the upper control unit FCU has the DPRAM 19
Read the response data from the response data area.

At the same time, the upper control unit FCU
Writes interrupt factor data indicating that it is a response confirmation response as an interrupt type in the FCU interrupt factor area of the DPRAM 19, and writes predetermined data in the FCU interrupt activation area of the DPRAM 19.

As a result, the FRAM data transfer request interrupt signal is output from the DPRAM 19 to the CPU 11 of the communication control unit CCU, whereby the communication control unit CCU (the CPU 11 thereof) first of all sends the DPRAM 19
The data is read from the FCU interrupt activation area. As a result, the FCU transfer request interrupt signal output from the DPRAM 19 is stopped.

Then, the communication control unit CCU
The interrupt factor data is read from the FCU interrupt factor area of the RAM 19, and it is determined whether the content requested for data transfer at that time is command data transmission, image data transfer, or response confirmation response. . In this case, since the interrupt factor is the response confirmation response, the communication control unit CCU determines that the response sent immediately before has been normally taken in by the upper control unit FCU, and shifts to the next operation.

By such a handshake procedure, commands / responses are exchanged between the upper control unit FCU and the communication control unit CCU.

When the upper control unit FCU sends the transmission image data to the communication control unit CCU, first, the upper control unit FCU sends the transmission image data to be sent to the empty data buffer in the data buffer area. Write the interrupt factor data indicating that the image data is transmitted as the interrupt type and at the same time write the interrupt factor data including the interrupt parameter indicating the data buffer in which the transmission image data is written in the FCU interrupt factor area of the DPRAM 19 The interrupt trigger data is sent to FC of DPRAM19.
Write to the U interrupt activation area.

As a result, the FRAM data transfer request interrupt signal is output from the DPRAM 19 to the CPU 11 of the communication control unit CCU, whereby the communication control unit CCU (the CPU 11 thereof) first sends the DPRAM 19
The data is read from the FCU interrupt activation area. As a result, the FCU data transfer request interrupt signal output from the DPRAM 19 is stopped.

Then, the communication control unit CCU makes the DP
The interrupt factor data is read from the FCU interrupt factor area of the RAM 19, and it is determined whether the interrupt factor at that time is command transmission, image data transfer, or response confirmation response. In this case, since the interrupt factor is image data transfer, the communication control unit CCU causes the data buffer of the DPRAM 19 corresponding to the bit in which the data “1” is set among the bits of the interrupt parameter at that time. Read the image data from the area data buffer,
The data is saved in the transmission image data buffer formed in the RAM 13.

At the same time, the communication control unit CCU
Writes predetermined image data read response data indicating that the reading of the image data is completed in the response data area of the DPRAM 19 and indicates that the response is sent as the interrupt type, and is received from the upper control unit FCU immediately before. Of each bit of the interrupt parameter, write the interrupt factor data including the interrupt parameter having the bit corresponding to the data buffer read at that time to data “0” to the CCU interrupt factor area of the DPRAM 19, Predetermined data is transferred to DPRAM 19
Write to the CCU interrupt activation area of.

As a result, the DPRAM 19 outputs a CCU data transfer request interrupt signal to the CPU 1 of the upper control unit FCU, whereby the upper control unit FCU (the CPU 1 thereof) first outputs the C of the DPRAM 19
Data is read from the CU interrupt activation area. As a result, the CCU transfer request interrupt signal output from the DPRAM 19 is stopped.

Next, the upper control unit FCU makes the DP
The interrupt factor data is read from the CCU interrupt factor area of the RAM 19 and it is determined whether the interrupt factor at that time is response transmission, image data transfer, or command confirmation response. In this case, since the interrupt factor is the response transmission, the upper control unit FCU has the DPRAM 19
Read the response data from the response data area. In this case, the received response data is the image data read response data indicating that the reading of the image data has been completed, and therefore the upper control unit FCU
The contents of the interrupt parameter contained therein are checked to determine whether the image data sent immediately before has been normally taken in by the communication control unit CCU, and the operation proceeds to the next operation.

When the communication control unit CCU sends the received image data to the upper control unit FCU, the communication control unit CCU first sends the received image data to the empty data buffer in the data buffer area. Write the interrupt factor data indicating that the data type is the image data transmission as the interrupt type, and at that time, write the interrupt factor data including the interrupt parameter indicating the data buffer in which the received image data is written to the CCU interrupt factor area of the DPRAM 19, Interrupt activation data is CC of DPRAM19
Write to the U interrupt activation area.

As a result, the DPRAM 19 outputs a CCU data transfer request interrupt signal to the CPU 1 of the upper control unit FCU, whereby the upper control unit FCU (the CPU 1 thereof) first outputs the C
Data is read from the CU interrupt activation area. As a result, the CCU data transfer request interrupt signal output from the DPRAM 19 is stopped.

Then, the upper control unit FCU
The interrupt factor data is read from the CCU interrupt factor area of the RAM 19 and it is determined whether the interrupt factor at that time is response transmission, image data transfer, or command confirmation response. In this case, since the interrupt factor is image data transfer, the upper control unit FCU causes the data buffer of the DPRAM 19 corresponding to the bit in which the data “1” is set among the bits of the interrupt parameter at that time. Image data is read from the data buffer of the area and stored in the transmission image data buffer formed in the RAM 3.

At the same time, the upper control unit FCU
Indicates that the predetermined image data read command data indicating that the reading of the image data has been completed is written in the command data area of the DPRAM 19 and that the command is transmitted as an interrupt type, and is received from the communication control unit CCU immediately before. Of each bit of the interrupt parameter, write the interrupt factor data including the interrupt parameter having the bit corresponding to the data buffer read at that time set to data "0" to the FCU interrupt factor area of the DPRAM 19, Predetermined data is transferred to DPRAM 19 F
Write to the CU interrupt activation area.

As a result, the DPRAM 19 outputs a CCU data transfer request interrupt signal to the CPU 11 of the communication control unit CCU, whereby the communication control unit CCU (of the CPU 11 thereof) first of all sends the DPRAM 19
The data is read from the FCU interrupt activation area. As a result, the FCU transfer request interrupt signal output from the DPRAM 19 is stopped.

Then, the communication control unit CCU
The interrupt factor data is read from the FCU interrupt factor area of the RAM 19, and it is determined whether the interrupt factor at that time is command transmission, image data, or response confirmation response. In this case, since the interrupt factor is the command transmission, the communication control unit CCU reads the command data from the command data area of the DPRAM 19. Since the command data in this case is the image data read command data indicating that the reading of the image data has been completed, the communication control unit CCU checks the content of the interrupt parameter included in the command data and confirms that the image data sent immediately before is It is determined whether or not the data has been normally taken into the upper control unit FCU, and the operation proceeds to the next operation.

In this way, the upper control unit FCU
The transmission image data formed by (1) is transferred to the communication control unit CCU, and the reception image data formed by the communication control unit CCU is transferred to the upper control unit FCU.

The ROM 1 of the communication control unit CCU
As shown in FIG. 4A, various data necessary for connecting to the public network and private branch exchange network of each country and handshake timing condition data of the interface means with the host control unit FCU are shown in FIG. A group 3 parameter table in which the group 3 parameters including the above is collected is stored.

Each group 3 parameter is, as shown in FIG. 11B, a country code representing a corresponding country, a network connection parameter consisting of various data necessary for connecting to a public network and a private branch exchange network, It also consists of setting data relating to its own terminal.

As shown in FIG. 7C, the network connection parameters are public exchange parameters representing various condition data in the public network, private exchange parameters representing various condition data in the private branch exchange network (private branch exchange), and busy tone standards. It consists of a busy tone parameter that expresses (tone frequency range, on / off condition, etc.) and a dial tone parameter that expresses the dial tone standard (tone frequency range, on / off condition, etc.).

Further, the setting data is, as shown in (d) of the figure, switch information indicating the setting state of the communication function of the terminal itself, the minimum guarantee time indicating the one line minimum guarantee time,
It is composed of a handshake time (H_S_Time # 1 to #N) representing a command waiting time corresponding to N types of commands output by the upper control unit FCU.

With the above configuration, when the group 3 facsimile apparatus is powered on, the upper control unit FCU
The communication control unit CCU first initializes the system of each unit, and when the initialization is completed, executes the inter-unit initialization processing as shown in FIG.

That is, first, the upper control unit FCU
Sends a "group 3 parameter initialization request command" including preset country code information to the communication control unit CCU.

Accordingly, the communication control unit CCU is
The country code information included in the received "group 3 parameter initialization request command" is extracted, and the same value as the country code information is set in the country code group 3
Parameters are read, and the read contents are SRA
The data is stored in a predetermined area for the group 3 parameter secured in M14, and a "group 3 parameter initialization confirmation response" including the group 3 parameter is sent to the upper control unit FCU.

The upper control unit FCU is "group 3
When the "parameter initialization confirmation response" is accepted, the group 3 parameters included therein are stored in a predetermined area of the RAM 3 (or the magnetic disk device 8). Then, the minimum guaranteed time set in advance and the handshake time representing the command waiting time corresponding to N types of commands are read out, and the "group 3 parameter setting request command" including the contents is sent to the communication control unit CCU. To do.

The communication control unit CCU is in charge of the "group 3
When the "parameter setting request command" is accepted, the minimum guaranteed time included in the command and the handshake time indicating the command waiting time corresponding to the N kinds of commands are used to determine the minimum guaranteed time of the group 3 parameter previously stored in the SRAM 14. Rewrite the value and the value of handshake time. Then, the communication control unit CC
The U sends a "group 3 parameter setting confirmation response" including information indicating the version number of the ROM 12 to the upper control unit FCU.

The upper control unit FCU is "group 3
When the "parameter setting confirmation response" is accepted, the version information of the communication control unit CCU included in the response is extracted, and the communication control unit CCU is referred to by referring to the table or the like showing the relationship between the version number of the ROM 12 and the communication function of the communication control unit CCU. Recognize the communication functions that can be provided by.

When the inter-unit initialization processing is completed in this way, the upper control unit FCU and the communication control unit CCU each shift to the standby operation.

In this way, in this embodiment, the parameter corresponding to the device function of the upper control unit FCU is notified to the communication control unit CCU in the inter-unit initialization process executed when the power is turned on. The communication control unit CCU is a communication control process to be executed thereafter,
Also, in the interface control processing, the operation that refers to the parameter notified at that time can be performed.

FIG. 6 shows the operation when the group 3 facsimile communication is executed between the group 3 facsimile machines shown in FIG. In the following description, the upper control unit FCU and the communication control unit CC
The exchange of commands / responses between U and the exchange of image data are executed by the handshake procedure described above.

First, when the user of the calling terminal sets the transmission original on the scanner 6, specifies the destination, and commands the start of transmission, the host control unit FCU of the calling terminal causes the telephone number of the destination specified at that time. In the state in which is specified, the "call origination connection request command" indicating that the call origination connection is requested is sent to the communication control unit CCU, whereby the communication control unit CCU is included in the "call origination connection request command". Call the destination (dial).

As a result, a call signal is sent from the network to the destination terminal, which causes the communication control unit C of the destination terminal to be sent.
The CU detects the incoming call and therefore the communication control unit CC
The U sends an "incoming call notification response" for notifying that the incoming call has been detected to the upper control unit FCU. The upper control unit FCU sends the “incoming call connection request command” for instructing to respond to the incoming call, to the communication control unit CC.
Then, the communication control unit CCU responds to the network by receiving an incoming call and sends an "incoming call connection confirmation response" indicating that the incoming call connection has been completed to the upper control unit F.
Send to CU. As a result, the upper control unit FCU
Sends a "reception start request command" for instructing the start of the reception operation to the communication control unit CCU.

Thus, the communication control unit C of the destination terminal
The CU is a called station identification signal CED (tone signal) for indicating that the terminal itself is a non-voice terminal, and a digital identification signal D for notifying the standard function of the terminal itself.
IS (binary signal) is transmitted.

When the communication control unit CCU of the calling terminal detects the called station identification signal CED, it sends a "calling connection confirmation response" to the upper control unit FCU, and the upper control unit FCU starts image information transmission. A "transmission start request command" indicating the effect is sent to the communication control unit CCU, which causes the communication control unit CCU to send a "transmission start confirmation response" to the upper control unit FCU. Then, the upper control unit FCU sends a "transmission mode setting request command" requesting to set the transmission function used at that time to the communication control unit CCU in a state where the minimum number of bits per line is designated. . Here, the minimum number of bits per line is the measured value of the time required to output the image data for one line when the original image is read by the scanner 6 is 2400.
It is a value converted into the number of bits of image data transmitted at bps. For example, when the measured value is 8 milliseconds, 2400b
Converted to the number of bits of image data sent in ps, 19.
Since it is 2, the minimum number of bits per line in this case is 20 bits. This minimum number of bits per line is a value preset in the upper control unit FCU.

Thus, the communication control unit C of the calling terminal
When the CU receives the digital identification signal DIS from the destination terminal, the CU compares the parameter of the digital identification signal DIS with the transmission function of its own terminal to determine a common transmission function,
Set the transmission function used at that time. At this time, the communication control unit CCU refers to the value of the group 3 parameter stored in the SRAM 14 to determine the transmission function of its own terminal. For the minimum guaranteed time, the larger value of the value notified from the upper control unit FCU and the minimum value that can be set is adopted.

Then, the communication control unit CCU of the calling terminal
Sets the set transmission function internally, and
Digital command signal DCS for notifying its transmission function
Is transmitted to the destination terminal, and a predetermined training check signal TCF is transmitted in order to execute the modem training procedure at the modem speed set at that time.

Upon receiving the digital command signal DCS from the calling terminal, the communication control unit CCU of the called terminal sends a "reception start confirmation response" for notifying that the receiving operation is started to the upper control unit FCU, The control unit FCU sends a "reception mode notification request command" requesting notification of the reception mode to the communication control unit CCU.

On the other hand, the communication control unit CCU of the destination terminal
Sets the transmission function designated by the calling terminal internally, receives the training check signal TCF, and determines the reception result at that time. And the reception result is OK
In this case, the reception preparation confirmation signal CFR is transmitted to the calling terminal, and the “reception mode notification confirmation response” indicating that the preparation for reception is completed is transmitted to the upper control unit FCU. As a result, the upper control unit FCU shifts to the transfer image input transfer ready state of the received image data after sending the “image information reception request command” to the communication control unit CCU.
Also, the communication control unit CCU sends the “image information reception confirmation response” to the upper control unit FCU,
Transition to the image information reception preparation state. Further, the communication control unit CCU writes a value corresponding to the operation mode at that time in the data buffer table of the DPRAM 19. In this case, set the data buffer area to two data buffers #
1 and # 2, the contents of the reference tables # 1 and # 2 are written in the data buffer table.

When the communication control unit CCU of the calling terminal receives the reception preparation confirmation signal CFR from the called terminal, it sends out a "transmission mode setting confirmation response" indicating that the transmission preparation is completed to the upper control unit FCU. At this time, the communication control unit CCU writes a value corresponding to the operation mode at that time in the data buffer table of the DPRAM 19. In this case, 2 data buffer areas
Since it is divided into one data buffer # 1 and # 2, the contents of the reference tables # 1 and # 2 are written in the data buffer table.

As a result, the upper control unit FCU of the calling terminal sends the "image information transmission request command" to the communication control unit CCU. As a result, the communication control unit CCU sends an “image information transmission confirmation response” to the higher-level control unit FCU, which causes the higher-level control unit FCU to start the reading operation of the scanner 6 and the transmission sequentially output from the scanner 6. The image data is the communication control unit CCU according to the above handshake procedure.
In the communication control unit CCU, the transmission image data transferred and input is temporarily stored in a buffer secured in the RAM 13, and is encoded and compressed by the encoding / decoding unit 16 by the encoding method set at that time. The image information obtained by the above is sequentially transferred to the group 3 facsimile modem 17,
The image information PIX is sent to the destination terminal. At this time, the communication control unit CCU applies a value obtained by multiplying the value of the minimum number of bits per line notified from the higher-level control unit FCU by the value of the quotient when the transmission rate at that time is divided by 2400 bps. Fill bits are appropriately inserted as the number of bits. For example, the minimum number of bits per line is 2
In the case of 0 bit, if the modem speed is 9600 bps, the value of the minimum applicable number of bits is 80 (= 20 × (9600
÷ 2400)).

When the communication control unit CCU of the destination terminal receives the image information PIX from the calling terminal, it decodes the received image information PIX by the encoding / decoding unit 16 to detect an error, and at the same time, it is obtained by the decoding. The image data is transferred to the host control unit FC by the handshake procedure described above.
Transfer to U. The host control unit FCU sequentially transfers the transferred and input image data (received image data) to the plotter 7, and records and outputs the received document.

When the communication control unit CCU of the calling terminal completes the transmission of the image information for one page, it sends the "image information transmission completion notification response" to the upper control unit FCU,
The upper control unit FCU sends a "send result request command" requesting the notification of the send result to the communication control unit CCU together with the notification of the presence or absence of the subsequent page. At the same time, when the transmission of the image information for one page is completed, the communication control unit CCU sends a procedure end signal EOP as a post-message command to the destination terminal because there is no subsequent page in this case.

When the communication control unit CCU of the destination terminal receives the procedure end signal EOP as a post-message command,
The “image information reception completion notification response” for notifying that the reception of the image information for one page has been completed is sent to the upper control unit FC.
Then, the higher-level control unit FCU sends a “reception result request command” requesting notification of the reception result to the communication control unit CCU. Also, the communication control unit CCU
If the reception result at that time is good, it sends a message confirmation signal MCF as a response signal to the calling terminal, and sends a "reception result confirmation response" notifying the content of the reception result to the upper control unit FCU. Further, the upper control unit FCU sends a "reception start request command" to the communication control unit CCU to prepare for reception of the next page.

When the communication control unit CCU of the calling terminal receives the message confirmation signal MCF from the called terminal, it sends out a "transmission result confirmation response" for notifying the transmission result OK to the upper control unit FCU.
The CU sends a "line disconnection request command" for requesting line disconnection to the communication control unit CCU. As a result, the communication control unit CCU of the calling terminal sends a disconnection command signal DCN to the called terminal to restore the line and sends a "line disconnection notification response" for notifying the line disconnection to the upper control unit FCU. . As a result, a series of image information transmission operations on the calling terminal side is completed.

When the communication control unit CCU of the destination terminal receives the disconnection command signal DCN, it restores the line and sends a "line disconnection notification response" for notifying the line disconnection to the upper control unit FCU. As a result, the series of image information transmission operations on the destination terminal side is completed.

In this way, the command / response is exchanged between the host control unit FCU and the communication control unit CCU of the calling terminal according to the predetermined control sequence, and the transmission image data is transferred. Thus, the operation of the group 3 facsimile machine at the time of transmission is realized.

Now, at the time of this command / response exchange, when the communication control unit CCU sends a response and the next command to be received is not received within the time corresponding to the urgency of the command, The facsimile transmission control procedure with the partner terminal may be disconnected.

As described above, the situation in which the upper control unit FCU cannot send a command at an appropriate timing is as follows.
For example, various errors such as an error occurrence of the scanner 6 at the time of transmission and an error occurrence of the plotter 7 at the time of reception can be considered. In any case, a serious situation such that the transmission / reception operation cannot be continued thereafter occurs in the upper control unit FCU. This is the case.

Therefore, the command waiting time as described above is set for each command type,
If the desired command cannot be received even after the command waiting time elapses, the communication control unit CCU terminates the image information transmission operation currently being executed, and
Data representing "reset request" is set in the CCU status area of the DPRAM 19 and the upper control unit FCU is requested to reset.

The relationship between the command type and the command waiting time is as follows, for example.

That is, from the end of transmission of the image information PIX until the sending of the post-message command signal, CC
ITT Recommendation T. According to No. 30, it is specified that the interval of 75 ± 20 (milliseconds) is provided, so that the waiting time from the transmission of the image information transmission end notification response to the reception of the transmission result request command is 50 (Millisecond) The time can be set to about millisecond.

On the other hand, the command / response exchanged during the pre-transmission procedure is not provided with such a time constraint, and thus can be set appropriately long. For example, it can be set in the range of about 100 (milliseconds) to 800 (milliseconds).

Therefore, the degree of restriction on the waiting time in the communication control unit CCU varies depending on the type of command, and in this embodiment, the upper control unit FCU can set the waiting time. It is possible to obtain the response performance of the handshake procedure according to the performance.

FIG. 7 shows an example of inter-unit initialization processing executed by the upper control unit FCU.

First, the upper control unit FCU reads out the preset country code information (process 10).
1), "Group 3 including the read country code information
Parameter initialization request command "to the communication control unit C
It is sent to the CU (process 102).

Next, when the "group 3 parameter initialization confirmation response" is received from the communication control unit CCU, the group 3 parameters included therein are taken out and stored in a predetermined area of the RAM 3 (process 104).

Then, of the group 3 parameters, the preset parameters to be changed (minimum guarantee time and handshake time representing command waiting time corresponding to N kinds of commands) are read out (process 105), and the parameters are read. The "group 3 parameter setting request command" including the changed parameter is sent to the communication control unit CCU.

Next, when the "group 3 parameter setting confirmation response" is received from the communication control unit CCU (process 107), the version number of the ROM included therein is saved (process 108), and the communication control unit C is processed.
The communication function that can be executed by the CU is determined.

FIG. 8 shows an example of inter-unit initialization processing executed by the communication control unit CCU.

First, when the "group 3 parameter initialization request command" is received from the upper control unit FCU (process 201), the country code information included therein is taken out, and the same value as the country code information is set in the country code. Read out the group 3 parameters that exist (Process 20
2) The read contents are stored in a predetermined area for the group 3 parameter secured in the SRAM 14 (process 203), and a “group 3 parameter initialization confirmation response” including the group 3 parameter is sent to the upper control unit. It is sent to the FCU (process 204).

Next, when the "group 3 parameter setting request command" is received from the upper control unit FCU, the SRAM 14 is set with the value of the change parameter included in it.
Then, the value of the corresponding item of the group 3 parameter stored previously is rewritten (process 206).

Then, the version number of the ROM 12 is obtained (process 207), and the "group 3 parameter setting confirmation response" including the information showing the version number is sent to the upper control unit FCU (process 208).

FIG. 9 shows an example of processing when the interface means of the communication control unit CCU receives the command data transmitted from the upper control unit FCU via the DPRAM 19.

First, the command type of the command to be received at that time is determined (process 301), and the handshake time (H_S_Ti) corresponding to the command type is determined.
me) is read from the SRAM 14 (process 301), and the value of the read handshake time is set to the variable TIME.
Set to N and start the soft timer (Process 3
03).

In this state, it is monitored whether the target command data is received before the time-out (decision 30).
4,305,306 NO loop). Judgment 3 if the target command data is received before the timeout
When the result of 04 is YES and the result of judgment 305 is YES, the soft timer is stopped and a command confirmation response for notifying that the command data has been received is sent to the upper control unit FCU (process 307). ) The process for receiving one command is completed, and the process proceeds to the next process.

Further, a timeout occurs before the target command data is received, and the result of judgment 306 is YES.
When it becomes, a reset notification is sent to the upper control unit FCU (process 308) and the command reception process ends in error. In this case, a predetermined error end process is executed.

FIG. 10 shows a handshake procedure executed by the interface means of the communication control unit CCU.
An example of processing when an FCU data transfer request interrupt signal is detected is shown.

First, the FCU data transfer request interrupt signal is monitored (NO loop of decision 401), and when the FCU data transfer request interrupt signal is detected and the result of decision 401 is YES, the FCU of DPRAM 19 is detected. The interrupt factor data is read from the interrupt factor area and it is determined whether or not the interrupt factor at that time is command transmission (decision 40).
3).

When the result of the judgment 403 is YES, the command data is read from the command data area of the DPRAM 19 (process 404) and the upper process (or basic software (= real-time multitasking operating system)) is notified of the command reception. (Process 4
05), and returns to the determination 401.

When the result of judgment 403 is NO, it is judged whether or not the interrupt factor at that time is image data transfer (judgment 406). The result of judgment 406 is YE
When it becomes S, the image data is read from the data buffer of the data buffer area of the DPRAM 19 corresponding to the bit in which the data “1” is set among the bits of the interrupt parameter at that time, and is formed in the RAM 13. The transmission image data is stored in the transmission image data buffer (process 407), the upper process (or basic software) is notified of the transmission image data reception (process 408), and the process returns to the determination 401.

When the result of judgment 406 is NO, it is judged whether the interrupt factor at that time is a response confirmation response (decision 409). When the result of the determination 409 is YES, the reception of the response confirmation response is notified to the upper process (or the basic software) (process 41
0), the process returns to decision 401.

When the result of the determination 409 is NO, the process (process 411) corresponding to the interrupt type data at that time is executed, and the process returns to the determination 401.

FIG. 11 shows an example of the soft timer process executed by the communication control unit CCU.

First, the variable TIMEN is input (process 50).
1) Unmask the timer interrupt process that generates an interrupt signal every time 20 (milliseconds) is counted (process 50
2), wait until a timer interrupt occurs (N in judgment 503)
O loop).

When a timer interrupt is generated and the result of judgment 503 is YES, the value of the variable TIMEN is decremented (process 504), it is checked whether the value of the variable TIMEN is equal to 0 (judgment 505), and the judgment is made. When the result of 505 is NO, the process returns to the determination 503.

If the result of the judgment 505 is YES, the timer interrupt process is masked (process 506) and the timeout is notified to the upper process (or basic software) (process 5).
07).

In this case, as the timer value set in the variable TIMEN, it is necessary to use the value of the quotient when the time to be measured is divided by 20 (milliseconds). Therefore, when setting the value of the variable TIMEN in the upper process, the value of the quotient obtained by dividing the handshake time by 20 (milliseconds) is set as the timer value. Further, if the set value of the handshake time is defined in advance in a unit of 20 (milliseconds), the set value of the handshake time can be used directly. That is, in this case, the value that can be set as the handshake time is
The unit is 20 (milliseconds). If the timer interrupt period used in the soft timer process is set to a shorter value, the handshake time can be set more finely.

FIG. 12 shows an example of response data transmission processing executed by the communication control unit CCU.

First, the response data to be transmitted is DPR
Write to the response data area of AM19, write the interrupt factor data indicating that the response is sent as the interrupt type to the CCU interrupt factor area of DPRAM19, and write the predetermined interrupt trigger data to the CCU interrupt trigger area of DPRAM19. (Process 601).

In that state, the process waits until the reception of the response confirmation response is notified (NO loop of determination 602), the reception of the response confirmation response is notified, and the result of determination 602 is Y.
When it becomes ES, the process proceeds to the next process.

In FIG. 13, the upper control unit FCU is
An example of processing when receiving response data from the communication control unit CCU via the PRAM 19 is shown.

First, the preset response waiting time is set in the variable TIMEM, and the soft timer is started (process 701).

In this state, it is monitored whether the desired response data is received by the time-out (decision 7).
02,703,704 NO loop). When the target response data is received before the time-out, the result of judgment 702 is YES and the result of judgment 703 is YES, the soft timer is stopped and the response data is sent to the communication control unit CCU. A response confirmation response is sent to notify that the
5) The process for receiving one response is ended, and the process proceeds to the next process.

Further, a time-out occurs before the target response data is received, and the result of judgment 704 is YE.
When S, the response reception process ends in error. In this case, a predetermined error end process is executed.

FIG. 14 shows an example of processing when the CCU data transfer request interrupt signal is detected in the handshake procedure executed by the upper control unit FCU.

First, when the CCU data transfer request interrupt signal is monitored (NO loop of decision 801) and the CCU data transfer request interrupt signal is detected and the result of decision 801 is YES, the CCU of DPRAM 19 is detected. The interrupt factor data is read from the interrupt factor area and it is determined whether or not the interrupt factor at that time is a response transmission (decision 8).
03).

When the result of the judgment 803 is YES, the response data is read from the response data area of the DPRAM 19 (process 804) and the upper process (or basic software (= real-time multitasking operating system)) is notified of the response reception. (Processing 805) and the process returns to the determination 801.

When the result of judgment 803 is NO, it is judged whether or not the interrupt factor at that time is image data transfer (judgment 806). The result of judgment 806 is YE
When it becomes S, the image data is read from the data buffer in the data buffer area of the DPRAM 19 corresponding to the bit in which the data “1” is set among the bits of the interrupt parameter at that time, and is formed in the RAM 3. The transmission image data is stored in the transmission image data buffer (process 807), the reception of the transmission image data is notified to the upper process (or basic software) (process 808), and the process returns to the determination 801.

When the result of judgment 806 is NO, it is judged whether the interrupt factor at that time is a command confirmation response (decision 809). When the result of the judgment 809 is YES, the reception of the command confirmation response is notified to the upper process (or the basic software) (process 81).
0), the process returns to decision 801.

When the result of the judgment 809 is NO, the process (process 811) corresponding to the interrupt type data at that time is executed, and the process returns to the judgment 801.

FIG. 15 shows an example of the soft timer process executed by the upper control unit FCU.

First, the variable TIMEM is input (process 90).
1) Unmask the timer interrupt process that generates an interrupt signal each time 20 (milliseconds) is counted (process 90
2) Wait until a timer interrupt occurs (N in judgment 903)
O loop).

When a timer interrupt occurs and the result of judgment 903 becomes YES, the value of the variable TIMEM is decremented (step 904), and it is checked whether the value of the variable TIMEM is equal to 0 (judgment 905). When the result of 905 is NO, the process returns to the determination 903.

If the result of the judgment 905 is YES, the timer interrupt processing is masked (processing 906) and the timeout is notified to the upper process (or basic software) (processing 9).
07).

In this case, the timer value set in the variable TIMEM is a numerical value expressed in units of 20 (milliseconds). Also, the time set in the variable TIMEM is
It is advisable to set the time so long as it does not affect other processing.

FIG. 16 shows an example of command data transmission processing executed by the upper control unit FCU.

First, the command data to be transmitted is DPRA.
Write to the command data area of M19, write the interrupt factor data indicating that the command is sent as an interrupt type to the FCU interrupt factor area of DPRAM19, and write the predetermined interrupt activation data to the FCU interrupt activation area of DPRAM19. (Process 1001).

In this state, the process waits until the command confirmation response is received (NO loop of decision 1002), the command confirmation response is notified, and the result of decision 1002 is Y.
When it becomes ES, the process proceeds to the next process.

FIG. 17 shows an example of processing when the upper control unit FCU transfers transmission image data to the communication control unit CCU.

First, the upper control unit FCU stores the first transfer unit of the transmission image data in the data buffer # 1 and the next transfer unit of the transmission image data in the data buffer # 2 (process 1101). Image data is transmitted, and at the same time, interrupt factor data including an interrupt parameter indicating the data buffer in which the transmission image data is written is written in the FCU interrupt factor area of the DPRAM 19, and the predetermined interrupt activation data is written in the DPRAM 19 Is written in the FCU interrupt activation area (step 1102). In this state, the communication control unit CCU waits until an image data read response confirmation response is sent (decision 110).
3 NO loop).

The transmission image data of one transfer unit is taken into the communication control unit CCU, and the result of judgment 1103 is YES.
, The data buffers # 1 and # 2 at that time
The empty area is checked (process 1104), the transmission image data of the next one transfer unit is saved in the empty data buffer (process 1105), and it is shown that the interrupt type is image data transmission. At this time, the interrupt factor data including the interrupt parameter representing the data buffer in which the transmission image data is written is written in the FCU interrupt factor area of the DPRAM 19 and the predetermined interrupt activation data is set in the DPRAM1.
9 is written in the FCU interrupt activation area (process 1106).
In this state, the communication control unit CCU waits until an image data read response confirmation response is sent (decision 1
107 NO loop).

The transmission image data of one transfer unit is taken into the communication control unit CCU, and the result of judgment 1107 is YES.
When it becomes, it is checked whether or not the transfer of the transmission image data for one page is completed at that time (decision 1108), and when the result of the judgment 1108 is NO, the process 1104 is performed.
Then, the remaining transmission image data is transferred.

When the result of determination 1108 is YES, the communication control unit CCU is notified that the transfer of the transmission image data for one page has been completed (process 11).
09), the processing ends.

FIG. 18 shows a processing example when the communication control unit CCU receives the transmission image data transferred from the upper control unit FCU.

First, the generation of a transfer request for transmission image data is monitored (NO loop of judgment 1201). When the result of judgment 1201 is YES, among the bits of the interrupt parameter obtained at that time, The image data is read from the data buffer in the data buffer area of the DPRAM 19 corresponding to the bit for which the data “1” is set,
The data is stored in the transmission image data buffer formed in the RAM 13 (process 1202).

Then, an image data read response indicating that the data input is completed is sent to the upper control unit FCU.
(Processing 1203), and then it is checked whether the end of one page is notified (decision 1204).

If there is subsequent transmission image data and the end of one page is not notified and the result of determination 1204 is NO, the process returns to determination 1201 to receive the next transmission image data. Further, when the end of transfer of the transmission image data for one page is notified and the result of the determination 1204 is YES, this processing is ended.

FIG. 19 shows a processing example when the communication control unit CCU receives image information for one page.

When the image information is received (process 1301), the received image information is decoded by the encoding / decoding unit 16 into the original image data (received image data) (process 1302), and the received image data obtained thereby is obtained. Is stored in a temporary buffer formed in the RAM 13 (process 1303), and processes 1301-1
Step 303 is repeatedly executed until the reception of the image information for one page is completed (NO loop of decision 1304).

When the reception of the image information for one page is completed and the result of the judgment 1304 is YES, it means 1 at that time.
It is checked whether or not the image information for the page has been normally received (decision 1305), and when the result of the determination 1305 is YES, the normal reception is notified to the partner terminal (process 130).
6) The received image data for one page is transferred to the host control unit F
Predetermined received image data transfer processing for transferring to the CU (processing 13
07) is executed.

If the image information for one page could not be received normally and the result of determination 1305 is NO, a reception error is notified to the partner terminal (process 130).
8) Then, the received image data for one page stored in the RAM 13 at that time is erased (process 1309).

FIG. 20 shows an example of the received image data transfer processing.

First, the communication control unit CCU stores the first transfer unit of the received image data in the data buffer # 1 and the next transfer unit of the received image data in the data buffer # 2 (process 1401). Image data is transmitted, and at the same time, interrupt factor data including an interrupt parameter indicating the data buffer in which the received image data is written is written in the CCU interrupt factor area of the DPRAM 19, and the predetermined interrupt activation data is written in the DPRAM 19 Is written in the CCU interrupt activation area (process 1402). In this state, the host control unit FCU waits until an image data read response confirmation command is sent (decision 1403).
NO loop).

The transmission image data of one transfer unit is taken into the upper control unit FCU, and the result of judgment 1403 is YES.
, The data buffers # 1 and # 2 at that time
The free area is checked (processing 1404), the transmission image data of the next one transfer unit is stored in the empty data buffer (processing 1405), and it is indicated that the interruption data is image data transmission. At this time, the interrupt factor data including the interrupt parameter representing the data buffer in which the received image data is written is written in the CCU interrupt factor area of the DPRAM 19 and the predetermined interrupt trigger data is written in the DPRAM1.
9 is written in the CCU interrupt activation area (processing 1406).
In this state, the host control unit FCU waits until an image data read response confirmation command is sent (decision 14
07 NO loop).

Received image data of one transfer unit is taken into the upper control unit FCU, and the result of judgment 1407 is YES.
When it becomes, it is checked whether or not the transfer of the received image data for one page is finished at that time (decision 1408). When the result of the judgment 1408 is NO, the process 1404 is performed.
Then, the remaining received image data is transferred.

When the result of determination 1408 is YES, the upper control unit FCU is notified that the transfer of the received image data for one page is completed (process 14).
09), the processing ends.

FIG. 21 shows an example of processing when the upper control unit FCU receives the received image data transferred from the communication control unit CCU.

First, the generation of a transfer request for received image data is monitored (NO loop of decision 1501). When the result of decision 1501 is YES, among the bits of the interrupt parameter obtained at that time, The image data is read from the data buffer in the data buffer area of the DPRAM 19 corresponding to the bit for which the data “1” is set,
The received image data buffer is stored in the RAM 13 (process 1502).

Then, an image data read command indicating that the data input is completed is sent to the communication control unit CCU (process 1503), and then it is checked whether or not the end of one page is notified (decision 1504).

When there is subsequent received image data, when the end of one page is not notified and the result of determination 1504 is NO, the process returns to determination 1501 to receive the next received image data. When the end of transfer of the received image data for one page is notified and the result of determination 1504 is YES, this process ends.

In the above-described embodiment, N handshake times are set according to the command type, and these handshake times can be set individually. However, this handshake time should be set to one type. May be possible. In this case, as shown in FIG. 22, the contents of the group 3 parameter setting data are switch information indicating the setting state of the communication function of the own terminal, 1
The minimum guaranteed time that represents the minimum guaranteed time of the line, and
It consists of one handshake time (H_S_Time).

As described above, when only one handshake time can be set, it is not necessary to manage a large number of handshake times, so that the processing load on the device is reduced. Moreover, the storage capacity of the storage device for storing the handshake time can be reduced.

In this case, a processing example when the interface means of the communication control unit CCU receives the command data transmitted from the upper control unit FCU via the DPRAM 19 is as shown in FIG.

First, the handshake time (H_S_Ti
me) is read from the SRAM 14 (processing 1601),
The value of the read handshake time is set to the variable TIM.
It is set to EN and the soft timer is started (process 1602).

In this state, it is monitored whether the target command data is received before the time-out (decision 16).
03, 1604, 1605 NO loop). If the desired command data is received before the timeout,
The result of the determination 1603 is YES, and the determination 160
When the result of 4 is YES, the soft timer is stopped and a command confirmation response for notifying that the command data has been received is sent to the upper control unit FCU (Processing 16
06) The process for receiving one command is completed, and the process proceeds to the next process.

Further, a time-out occurs before the target command data is received, and the result of judgment 1605 is YE.
When S is reached, a reset notification is sent to the upper control unit FCU (process 1607) and the command reception process ends in error. In this case, a predetermined error end process is executed.

Since the other processes in this embodiment are the same as those in the above-mentioned embodiment, the description thereof will be omitted.

Furthermore, the possible values of the handshake time can be limited to values that can be set by the communication control unit CCU.

In this case, as shown in FIG. 24, the contents of the group 3 parameter setting data include switch information indicating the setting state of the communication function of the terminal itself, the minimum guarantee time indicating the 1-line minimum guarantee time, and It consists of one handshake time (H_S_Time M).

Here, the handshake time (H_S_T
The value of (im M) is, for example, any one of preset multi-step values (in this case, as registered in the handshake time correspondence table shown in FIG. 25).
1 to 10). The handshake time correspondence table is stored in the ROM 12 of the communication control unit CCU in advance.

Here, the value of the count value corresponds to the value of the quotient obtained by dividing the value of the item of time by 20 (milliseconds).

In this case, a processing example when the interface means of the communication control unit CCU receives the command data transmitted from the upper control unit FCU via the DPRAM 19 is as shown in FIG.

First, the handshake time (H_S_Ti
(me M) is read from the SRAM 14 (processing 170
1) Read the count value corresponding to the read handshake time value from the handshake time correspondence table of the ROM 12 (process 1702), set the count value in the variable TIMEN, and start the soft timer (process 1703). .

In this state, it is monitored whether the target command data is received before the time-out (decision 17).
04, 1705, 1706 NO loop). If the desired command data is received before the timeout,
The result of the determination 1704 is YES, and the determination 170
When the result of 5 is YES, the soft timer is stopped and a command confirmation response for notifying that the command data has been received is sent to the upper control unit FCU (process 17).
07) End the process for receiving one command, and move to the next process.

Further, a time-out occurs before the target command data is received, and the result of judgment 1706 is YE.
When S is reached, a reset notification is sent to the upper control unit FCU (process 1708) and the command reception process ends in error. In this case, a predetermined error end process is executed.

Since the other processes in this embodiment are the same as those in the above-mentioned embodiment, the description thereof will be omitted.

By the way, in each of the above-mentioned embodiments, as the upper control unit FCU, one having a facsimile apparatus function is used, but the upper control unit FCU is not limited to this. For example, a personal computer having a processing function capable of creating / recording / storing facsimile image data, a copying machine unit, or the like is used as a host control unit F.
It can also be applied as a CU.

Further, in the above-mentioned embodiment, the minimum guaranteed time and the minimum number of bits per line (at 2400 bps) are used as the communication parameters set from the upper control unit FCU to the communication control unit CCU. Various parameters other than can also be set.

Further, in the above-mentioned embodiment, the DPRAM is used as the physical means of the interface between the upper control unit FCU and the communication control unit CCU, but other than this, a functional element having an equivalent communication function. Can be applied as the physical means of the interface.
For example, a multi-channel FIFO or RAM can be used.

As described above, in each of the embodiments of the present invention, the command waiting time in the handshake procedure executed by the interface means can be set to an optimum value for the host control unit, so that the performance of the entire system is improved. The effect is that it can be set to an optimum value.

Further, since the content of the reception capability information to be notified to the partner terminal at the time of reception is set by referring to the parameter value notified from the host control unit, the appropriate image information corresponding to the device function of the host control unit is set. There is also an effect that reception can be performed.

Since the transmission function for notifying the partner terminal is set based on the value of the parameter notified by the host control unit and the content of the reception capability information notified by the partner terminal, There is also an effect that it is possible to perform appropriate image information transmission corresponding to the device function.

When the communication control unit includes the interface means, the command waiting time in the handshake procedure executed by the interface means can be set to an optimum value for the host control unit, so that the performance of the entire system is optimized. It also has the effect that it can be set to a value.

When the communication control unit includes the interface means, the content of the reception capability information to be notified to the partner terminal at the time of reception is set by referring to the value of the parameter notified from the higher control unit. It is also possible to obtain an effect that it is possible to appropriately receive the image information corresponding to the device function.

When the communication control unit includes the interface means, a transmission function for notifying the partner terminal based on the value of the parameter notified by the host control unit and the content of the reception capability information notified by the partner terminal is provided. Since the setting is made, there is an effect that it is possible to appropriately transmit the image information corresponding to the device function of the upper control unit.

Further, the command waiting time in the handshake procedure executed by the interface means is set in advance corresponding to the device function of the host control unit and can be set to an optimum value for the host control unit. There is also an effect that the overall performance can be set to an optimum value.

Further, when the communication control unit includes the interface means, the command waiting time in the handshake procedure executed by the interface means is set in advance corresponding to the device function of the host control unit, and is optimal for the host control unit. Since the value can be set to the value, there is an effect that the performance of the entire system can be set to the optimum value.

[0233]

As described above, according to the present invention,
Since the command waiting time in the handshake procedure executed by the interface means can be set to the optimum value for the upper control unit, the effect that the performance of the entire system can be set to the optimum value is obtained.

Also, since the content of the reception capability information to be notified to the partner terminal at the time of reception is set by referring to the value of the parameter notified from the host control unit, the appropriate image information corresponding to the device function of the host control unit is set. An effect that reception can be performed is obtained.

Since the transmission function for notifying the partner terminal is set based on the value of the parameter notified by the host control unit and the content of the reception capability information notified by the partner terminal, An effect that it is possible to perform appropriate image information transmission corresponding to the device function is obtained.

When the communication control unit includes the interface means, the command waiting time in the handshake procedure executed by the interface means can be set to an optimum value for the host control unit, so that the performance of the entire system is optimized. The effect is that it can be set to a value.

Further, when the communication control unit includes the interface means, the content of the reception capability information to be notified to the partner terminal at the time of reception is set by referring to the value of the parameter notified from the higher control unit. It is possible to obtain the effect that it is possible to appropriately receive the image information corresponding to the device function.

When the communication control unit includes the interface means, a transmission function for notifying the partner terminal based on the value of the parameter notified by the host control unit and the content of the reception capability information notified by the partner terminal is provided. Since the setting is made, there is an effect that it is possible to perform appropriate image information transmission corresponding to the device function of the host control unit.

[Brief description of drawings]

FIG. 1 is a block diagram showing a group 3 facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an example of area allocation in DPRAM.

FIG. 3 is a schematic diagram showing an example of a format of data stored in an interrupt factor area.

FIG. 4 is a schematic diagram showing an example of a group 3 parameter table.

FIG. 5 is a timing chart showing an example of inter-unit initialization processing.

FIG. 6 is a timing chart showing an example of processing during data transmission / reception.

FIG. 7 is a flowchart showing an example of inter-unit initialization processing executed by a higher control unit.

FIG. 8 is a flowchart showing an example of inter-unit initialization processing executed by a communication control unit.

FIG. 9 is a flowchart showing a processing example when a communication control unit receives a command.

FIG. 10 is a flowchart showing a processing example when an interrupt is detected by the communication control unit.

FIG. 11 is a flowchart showing an example of timer processing of the communication control unit.

FIG. 12 is a flowchart showing an example of response transmission processing of the communication control unit.

FIG. 13 is a flowchart showing an example of processing when a higher-order control unit receives a command.

FIG. 14 is a flowchart showing a processing example when an interrupt is detected by a host control unit.

FIG. 15 is a flowchart showing an example of timer processing of a host control unit.

FIG. 16 is a flowchart showing an example of command transmission processing of the upper control unit.

FIG. 17 is a flowchart showing an example of transmission data transfer processing of a host control unit.

FIG. 18 is a flowchart showing an example of transmission data transfer input processing of the communication control unit.

FIG. 19 is a flowchart showing an example of processing when the communication control unit receives.

FIG. 20 is a flowchart showing an example of received data transfer processing of the communication control unit.

FIG. 21 is a flowchart showing an example of received data transfer input processing of the upper control unit.

FIG. 22 is a schematic diagram showing another example of setting data.

FIG. 23 is a flowchart showing another processing example when the communication control unit receives a command.

FIG. 24 is a schematic diagram showing still another example of setting data.

FIG. 25 is a schematic diagram showing an example of a handshake time correspondence table.

FIG. 26 is a flowchart showing still another processing example when the communication control unit receives a command.

[Explanation of symbols]

 FCU Upper control unit CCU communication control unit 1,11 CPU (central processing unit) 2,12 ROM (read only memory) 3,13 RAM (random access memory) 14 SRAM (static RAM) 19 DPRAM

Claims (14)

[Claims] 1. A facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, wherein the communication control unit and the host control unit are connected to each other. DPRAM for bidirectionally exchanging data, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit. , An interface means capable of exchanging in a predetermined handshake procedure via the DPRAM and setting the reception waiting time of the command data of the communication control unit in multiple stages in the handshake procedure. I A facsimile communication apparatus comprising: interface means for controlling the waiting time to any value that can be set by the interface means. 2. A facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, wherein the communication control unit and the host control unit are connected to each other. DPRAM for bidirectional data exchange, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit. , Through the DPRAM, in accordance with a predetermined handshake procedure, in the handshake procedure, interface means capable of setting the reception waiting time of the command data of the communication control unit within a predetermined range, the upper control unit, Up A facsimile communication apparatus, characterized in that the interface means is provided with control means for setting the waiting time to an arbitrary value within the predetermined range settable by the interface means. 3. A facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, wherein the communication control unit and the host control unit are connected to each other. DPRAM for bidirectionally exchanging data, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit. , An interface capable of exchanging through the DPRAM in a predetermined handshake procedure, and in the handshake procedure, setting the reception waiting time of the command data of the communication control unit within a predetermined range according to the type of each command data. The host control unit sets a plurality of the waiting times for the interface means according to the type of each command data to any value within the predetermined range settable by the interface means. A facsimile communication apparatus comprising: a control unit for controlling the facsimile communication. 4. A method of controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit and the host control unit. DPRAM for bidirectionally exchanging data with the above, command data sent from the upper control unit to the communication control unit, and command data sent from the communication control unit to the higher control unit An interface means for exchanging response data through the DPRAM in a predetermined handshake procedure is provided, and the upper control unit, via the interface means, sets the values of parameters required for a preset group 3 facsimile communication function. Is notified to the communication control unit. 5. A facsimile communication device comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, wherein the communication control unit and the host control unit are connected to each other. DPRAM for bidirectionally exchanging data, command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit. , An interface capable of exchanging through the DPRAM in a predetermined handshake procedure, and in the handshake procedure, setting the reception waiting time of the command data of the communication control unit within a predetermined range according to the type of each command data. The host control unit sets a plurality of the waiting times for the interface means according to the type of each command data to any value within the predetermined range settable by the interface means. In addition, the facsimile communication apparatus further comprises control means for notifying the communication control unit of the value of the parameter required for the preset group 3 facsimile communication function via the interface means. 6. A facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, wherein the communication control unit is connected to the host control unit. DPRAM for bidirectional data exchange
And the command data received from the upper control unit and the response data sent to the upper control unit are exchanged in a predetermined handshake procedure via the DPRAM, and the command data is received in the handshake procedure. The host control unit is provided with interface means capable of setting the waiting time in multiple stages, and the upper control unit is provided with control means for setting the waiting time to any value that can be set by the interface means. A facsimile communication device characterized by the above. 7. A facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, wherein the communication control unit is connected to the host control unit. DPRAM for bidirectional data exchange
And the command data sent from the upper control unit to the communication control unit, and the response data sent from the communication control unit to the higher control unit, through the DPRAM in a predetermined handshake procedure. In addition, in the handshake procedure, the communication control unit is provided with interface means capable of setting the reception waiting time of the command data within a predetermined range, and the upper control unit sets the waiting time to the interface means. A facsimile communication apparatus comprising control means for setting an arbitrary value within the predetermined range settable by the interface means. 8. A facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, wherein the communication control unit is connected to the host control unit. DPRAM for bidirectional data exchange
And the command data sent from the upper control unit to the communication control unit, and the response data sent from the communication control unit to the higher control unit, through the DPRAM in a predetermined handshake procedure. Further, in the handshake procedure, the communication control unit is provided with interface means capable of setting a command data reception waiting time within a predetermined range according to the type of each command data, And a control means for setting a plurality of waiting times corresponding to respective command data types to arbitrary values within the predetermined range settable by the interface means. Communication device. 9. A method of controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, wherein the communication control unit is the host control unit. DPRAM for bi-directional data exchange with the unit
And the command data sent from the upper control unit to the communication control unit, and the response data sent from the communication control unit to the higher control unit, through the DPRAM in a predetermined handshake procedure. Facsimile communication, characterized in that the upper control unit notifies the communication control unit of parameter values required for a preset Group 3 facsimile communication function via the interface unit. Device control method. 10. A facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, wherein the communication control unit is connected to the host control unit. DPRAM for bidirectional data exchange
And the command data sent from the upper control unit to the communication control unit, and the response data sent from the communication control unit to the higher control unit, through the DPRAM in a predetermined handshake procedure. In addition, in the handshake procedure, the communication control unit is provided with interface means capable of setting a command data reception waiting time within a predetermined range according to the type of each command data. For each of the means, the plurality of waiting times corresponding to the respective types of command data are set to arbitrary values within the predetermined range settable by the interface means, and are set in advance via the interface means. Is a guru Facsimile communication apparatus the values of parameters required to flop 3 facsimile communication function characterized by comprising a control means for notifying the communication control unit. 11. A method of controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit and the host control unit. DPRAM for bidirectionally exchanging data with the above, command data sent from the upper control unit to the communication control unit, and command data sent from the communication control unit to the higher control unit The response data is exchanged through the DPRAM in a predetermined handshake procedure, and in the handshake procedure, the reception waiting time of the command data of the communication control unit is set within a predetermined range according to the type of each command data. Possible Interface means, and the upper control unit, for the interface means, a plurality of the waiting time according to the type of each command data, to any value within the predetermined range that can be set by the interface means. The communication control unit is provided with control means for setting and notifying the value of the parameter required for the preset group 3 facsimile communication function to the communication control unit via the interface means, and the communication control unit is the upper control unit. A method of controlling a facsimile communication apparatus, comprising forming reception capability information to be notified to a partner terminal when image information is received, based on the value of the parameter notified from the. 12. A method for controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, wherein the communication control unit is the host control unit. DPRAM for bi-directional data exchange with the unit
And the command data sent from the upper control unit to the communication control unit, and the response data sent from the communication control unit to the higher control unit, through the DPRAM in a predetermined handshake procedure. Further, in the handshake procedure, the communication control unit is provided with interface means capable of setting a command data reception waiting time within a predetermined range according to the type of each command data, For each of the means, the plurality of waiting times corresponding to the respective types of command data are set to arbitrary values within the predetermined range settable by the interface means, and are set in advance via the interface means. Is a guru Control means for notifying the communication control unit of the value of the parameter required for the type 3 facsimile communication function, and the communication control unit is based on the value of the parameter notified from the upper control unit when receiving image information. A method for controlling a facsimile communication apparatus, comprising forming reception capability information to be notified to a partner terminal. 13. A method of controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, the communication control unit and the host control unit. DPRAM for bidirectionally exchanging data with the above, command data sent from the upper control unit to the communication control unit, and command data sent from the communication control unit to the higher control unit The response data is exchanged through the DPRAM in a predetermined handshake procedure, and in the handshake procedure, the reception waiting time of the command data of the communication control unit is set within a predetermined range according to the type of each command data. Possible Interface means, and the upper control unit, for the interface means, a plurality of the waiting time according to the type of each command data, to any value within the predetermined range that can be set by the interface means. The communication control unit is provided with control means for setting and setting the parameter values required for the preset group 3 facsimile communication function to the communication control unit via the interface means. , The value of the parameter notified from the upper control unit, and
A control method for a facsimile communication apparatus, characterized in that a transmission function applied at that time is set based on reception capability information notified from a partner terminal. 14. A method of controlling a facsimile communication apparatus comprising a communication control unit having at least a group 3 facsimile communication function and a host control unit having at least an image data creating function, wherein the communication control unit is the host control unit. DPRAM for bi-directional data exchange with the unit
And command data sent from the upper control unit to the communication control unit, and response data sent from the communication control unit to the higher control unit, via the DPRAM in a predetermined handshake procedure. In addition, in the handshake procedure, the communication control unit is provided with interface means capable of setting a command data reception waiting time within a predetermined range according to the type of each command data. For each of the means, the plurality of waiting times according to the respective types of command data are set to arbitrary values within the predetermined range settable by the interface means, and are set in advance via the interface means. Is a guru A control means for notifying the value of the parameters required to flop 3 facsimile communication function to the communication control unit, when transmitting image information, the communication control unit, the value of the parameter reported from the upper level control unit and,
A control method for a facsimile communication apparatus, characterized in that a transmission function applied at that time is set based on reception capability information notified from a partner terminal.