JPH02232719A - Ic card system - Google Patents

Abstract

PURPOSE:To use not only a standard card but also a private IC card by sending initial data at a standard communication speed to initialize a device to a high communication speed at the time of inserting an IC card for quick read to a reading means. CONSTITUTION:When an IC card 5 is inserted to an IC card reader/writer 6, a picture control ECU 7 supplies power to the card 5. Then, a CPU in the card 5 executes the initial routine and transmits all commands of an answer-to- reset signal including a quick transducer switching command to automatically switch the communication rate to the high speed rate. Consequently, not only the standard IC card is read out but also the private IC card is read out at a high speed.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an IC card system.

[Conventional technology]

In recent years, the use of IC cards has been expanding, mainly for TD, and the general standard for IC cards is the 130 standard.

According to the ISO standard, reading and writing of data from a reader/writer to an IC card is performed at a relatively low speed via a read/write (R/W) shared terminal.

[Problem to be solved by the invention]

By the way, with the recent advances in LSI technology, there is a demand for using the above-mentioned IC cards exclusively as, for example, large-capacity storage media, but conventional IC card readers/writers can only read and write relatively slow standard IC cards. There was a problem.

The present invention is intended to solve these problems, and aims to provide an IC card system that allows high-speed reading of dedicated IC cards in addition to the use of standard IC cards.

[Means to solve the problem]

In order to achieve the above object, the present invention inserts a first IC card containing a first electronic memory storing predetermined data into a reading means, and reads the first RC card.
In an IC card system, communication between the card and the reading means is performed at a first communication speed, and data in the first electronic memory is sent to the reading means, comprising: a second electronic memory for high-speed reading; This second IC card has an IC card of
The card includes a second electronic memory storing data for predetermined high-speed reading, and initial data for setting the communication speed to a second communication speed higher than the first communication speed.
an initial setting means for transmitting the initial data to the reading means at a communication speed of 1, and a first communication speed for switching the communication speed between the reading means and the second communication speed after the initial setting means sends the initial data to the reading means; The reading means includes a second IC card that receives the initial data from the second IC card and switches and sets the communication speed with the second IC card to the second communication speed. It comprises a switching means, said 1st. After setting the second communication speed to be switched by the second switching means, the data in the second electronic memory is sent from the second IC card to the reading means by communication at the second communication speed. Adopt technical means to do so.

[Effect]

The operation of the above configuration will be explained.

By inserting an IC card for high-speed reading into the reading means, the IC card transmits initial data to the reading means at the first communication speed to set the communication speed for data transmission to the second communication speed. Send. By sending this initial data, the respective switching means in the IC card and the reading means change the communication speed between the IC card and the reading means to a second communication speed higher than the first communication speed. data in the electronic memory of the IC card is sent to the reading means through communication at the second communication speed.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention shown in the drawings will be described.

FIG. 1 is a block diagram showing a schematic configuration of a dedicated IC card for high-speed reading (hereinafter simply referred to as 10 card). 1st
In the figure, ■ is a serial communication port that is connected to an I/O terminal and converts parallel data and serial data, 2 is an instruction decoding/execution unit that decodes data from the serial communication port 1 and executes instructions, and 3 is a serial communication port that converts parallel data and serial data. A memory 4 for storing data is communication rate switching means for switching the communication rate in the serial communication board 1 by controlling clock pulses inputted through a clock terminal CLK. The above configuration of this IC card 5 includes a microprocessor (
CPLI) and memory.

Next, an example in which the present invention is applied to a vehicle navigation system (see FIG. 2) that uses the TC card 5 as a map storage memory will be described.

The navigation device has an image control all ECU 7, and the image control ECU 7 includes an IC card reader/writer 6,
Navigation ECU1 0, switch control ECU8,
A display device 9 is connected.

Navigation ECU1 O has GPS (Global Positioning System) reception all, Compass E
The CU 12 and the vehicle speed sensor 13 are connected as inputs, and the running position of the vehicle is sequentially calculated and sent to the image control ECU 7. The image control ECU 7 displays the traveling position on the display device 9, but prior to this, the image control ECU 7 displays the traveling position on the display device 9.
A necessary road map is read into U7.

This road map is read by setting the aforementioned map storage IC card 5 into the IC card reader/writer 6. In addition, when taking out the IC card 5 from the IC card reader/writer 6, press the EJECT switch 14 in FIG.
By inputting , switch system @ E C U 8
The ejection information is taken into the image control ECU.
Sent on 7.

The image system 11EcU7 sends out an EJECT signal to drive the eject mechanism of the IC card reader/writer 6, as shown in the block diagram of FIG. 3, and the IC card 5 is ejected from the IC card reader/writer 6.

Further, the switch control ECU 8 also controls an infrared touch switch on the front surface of the display device 9.

Next, the reading procedure from the IC card 5 will be sequentially explained using FIG.

First, when the IC card 5 is inserted into the IC card reader/writer 6, an IC card IN signal is sent from the IC card reader/writer 6 to the image control ECU 7. Then image control E
The CU 7 generates a VccON signal and supplies the power Vcc to the IC card 5 via a regulator (not shown) inside the IC card reader/writer 6. As a result, the power-on sequence shown in FIG. 4 is started. That is, after Vcc rises to 5■ in Figure 4 (1), Figure 4 (
The clock signal shown in 2) is at least 10 to 100 ns.
After the ec, a RESET signal is input from the oscillation circuit 6a of the IC card reader/writer 6 to the CLK terminal, and after a predetermined number of clock pulses or more are manually inputted, the image control ECU 7 activates the CPU in the tC card 5 after a minimum of 101 Isec. ((3) in FIG. 4) is input via the RESET@ child not shown in FIG. As a result, the CPU in the IC card 5 starts operating, and the initial routine of the operating program shown in the flowchart of FIG. 5 is executed.

In FIG. 5, step 501 of the initial routine
While the CPU is running, the CPU's internal registers, etc. are set, so the transmission terminal Natsu/0 terminal is set for 10 μs.
Communication is disabled between ec and 10rasec.

Next, the CPU in the IC card 5 outputs various commands as a serial signal to the I/O terminal as an answer-to-reset signal (shown at A in FIG. 4 (4)).
Step 502 in the diagram). Note that the answer-to-reset signal is for sending predetermined information in the IC card 5.
0 standard. The command group of the answer-to-reset signal includes a high-speed transfer switching command. Therefore, this IC card 5 is an answer to
After all commands of the reset signal are sent to the image control ECU 7, the communication rate is automatically switched to a high speed rate in step 504 (in this embodiment, from 9600 bps to 7
6. 8 Kbps). Note that during switching of this communication rate, that is, during the processing of steps 503 to 506, transmission and reception are disabled for approximately 350 ssec. When this communication rate switching process is completed, all subsequent commands and data transmission and reception (step 506 in FIG. 5) are performed in this example. It runs at 8 Kbps. For example, when the image control ECU 7 sends a command to ``send the number map data'', the IC card 5 decodes the command and sends the data corresponding to the map to the 7
6. Transmit at 8 Kbps.

The switching of the communication rate on the image system III E CUT side shown in FIG. 3 is performed according to the flowchart shown in FIG. Normally, after the initial settings (step 601), the low-speed serial port 7a is used in step 602 (high-speed serial port 7b interrupts are prohibited), but the answer tool of the IC card 5 - When a reset signal is received (step 603), interrupts to the low-speed serial baud}7a are prohibited (step 604), and interrupts to the high-speed serial baud 1-7b are enabled (step 603).
05), then a high speed 76. 8KbpsT:I
It communicates with the C card 5.

In addition, in FIG. 2, when a standard IC card containing information such as expressway interchange information and ferry timetables is inserted into the IC car 1' reader/writer 6, the standard IC card contains 76. Since the command to switch to 8 Kbps is not included, communication between the IC card and the image control ECU 7 is performed at 9600 bps.

In this embodiment, the reading means is the navigation device, the initial setting means is the answer-to-reset signal, and the I switching means is the communication rate switching means and the fifth
Step 504 in the figure, the second switching means are steps 604 and 605 in Figure 6, the first communication speed is 960
0bρS, and the second communication speed is 76.8κbps.

〔Effect of the invention〕

As described above, in the present invention, when a dedicated IC card is inserted into the reading means, the initial setting means switches the communication speed for data transmission from the first communication speed to the second communication speed higher than the first communication speed. Data is sent to the reading means at the first communication speed, and by sending this initial data, each switching means in the IC card and the reading means changes the communication speed between the IC card and the reading means to the second communication speed. Since the data in the electronic memory in the IC card is transmitted at the second communication speed, the dedicated IC card can be read at high speed, and a standard IC card can be inserted into the reading means. There is an excellent effect that reading is possible even when the data is read.

[Brief explanation of the drawings] Figure 1 is a block diagram showing the schematic configuration of a dedicated IC card.
FIG. 2 is a configuration diagram of the vehicle navigation device, FIG. 3 is a system block diagram, FIG. 4 is a diagram showing the power-on sequence of the IC card, and FIG. 5 is a flowchart showing the initial routine of the IC card. FIG. 6 is a flowchart showing the communication rate switching routine of the image control ECU. DESCRIPTION OF SYMBOLS 1... Serial communication boat, 2... Instruction decoding execution means, 3... Memory, 4... Communication rate switching means, 5
...IC card, 6...IC card reader writer,
7... Image control ECU.

Claims (1)

[Scope of Claims] A first IC card having a built-in first electronic memory storing predetermined data is inserted into the reading means, and the first IC card is read.
In an IC card system, communication between the C card and the reading means is performed at a first communication speed, and data in the first electronic memory is sent to the reading means, comprising: a second communication speed for high-speed reading; The second IC card has a second electronic memory that stores data for predetermined high-speed reading, and a second electronic memory that stores data for predetermined high-speed reading, and a second electronic memory that stores data for predetermined high-speed reading, and a
initial setting means for sending initial data to the reading means at the first communication speed to set a second communication speed higher than the communication speed; and after sending the initial data by the initial setting means, the reading means The communication speed between
the reading means receives the initial data from the second IC card and changes the communication speed with the second IC card to the second IC card. and a second switching means for switching to a communication speed of the second communication speed, and after the first and second switching means switch to the second communication speed, the data in the second electronic memory is transferred to the second communication speed. I characterized in that the information is sent from the second IC card to the reading means through communication at a communication speed.
C card system.