CN201589993U

CN201589993U - Real-time clock system and mainboard and computer using same

Info

Publication number: CN201589993U
Application number: CN2009202127054U
Authority: CN
Inventors: 邹永平
Original assignee: SHANGHAI YANXIANG INTELLIGENT TECHNOLOGY Co Ltd
Current assignee: SHANGHAI YANXIANG INTELLIGENT TECHNOLOGY Co Ltd
Priority date: 2009-12-08
Filing date: 2009-12-08
Publication date: 2010-09-22
Anticipated expiration: 2019-12-08

Abstract

The utility model provides a real-time clock system, comprising a CMOS, an electric wave receiving device and a device for backing up CMOS data, wherein the electric wave receiving device is connected with the CMOS and can receive a standard clock signal, and the device for backing up CMOS data is connected with the CMOS. The electric wave receiving device is connected with the CMOS and calibrates the clock of the CMOS in starting-up each time. The utility model also provides a mainboard and a computer which use the real-time clock system. The real-time clock system overcomes the defect that the data stored by the CMOS is lost as the existing RTC module powers down or the clock is inaccurate as a crystal oscillator is adopted.

Description

A kind of real-time clock system and use mainboard, the computing machine of this system

Technical field

The utility model relates to a kind of real-time clock system, relates in particular to a kind of mainboard and computing machine that is used for the real-time clock system of computing machine and uses this system.

Background technology

Present stage, used computer system all was to carry out work by the operating system that Basic Input or Output System (BIOS) (BIOS, Basic InputOutput System) guiding enters in the External memory equipment.

In computing machine, utilize parameters such as complementary metal oxide semiconductor (CMOS) (CMOS, Complementary MetalOxide Semiconductor) writing time, date and BIOS such as device initialize information, user to set information that data are set.Real-time clock (RTC in the computing machine, Real Time Clock) module provides system clock and cmos data storage space for computing machine, its external circuit comprises power-supplying circuit, reset circuit, crystal oscillating circuit, and its inside comprises clock generating module, cmos data memory module.

When the power down of RTC modular power source, the BIOS that is recorded in the cmos data memory module is provided with data and will loses.These are provided with the basic setting that data are being maintained whole computer system, in case lose, system can't operate as normal.The user must could recover user's initial set value of computer system be provided with item by item from the setting picture that is advanced into BIOS behind the computer booting next time.

The RTC module of computer motherboard generally adopts the powered battery mode at present, and its internal time is produced by crystal oscillating circuit.Because factors such as environmental impact, misoperation can cause the CMOS power down, cause the temporal information of RTC inside, the loss of data of CMOS storage, thereby influence the normal use of computing machine.In the RTC module, the CMOS time is produced by crystal oscillator, because the physical characteristics of crystal oscillator makes it the life period error, and error can constantly add up, and this can't satisfy for the situation that needs precise time.Simultaneously, in the RTC module, because be the powered battery mode, the user need take computing machine apart and change battery when dead battery, and is very inconvenient.

The utility model content

The utility model is for solving the above-mentioned problem of mentioning, and a kind of real-time clock system is provided and used mainboard, the computing machine of this system, and its technical scheme that adopts is as described below.

A kind of real-time clock system comprises CMOS, also comprises the radio wave receiver that is connected with CMOS respectively and the device of backup of CMOS data.

Wherein, described radio wave receiver is the device that can receive the standard clock signal that the time service center sent and this clock signal demodulation can be sent to CMOS.

Wherein, the device of described backup of CMOS data is non-volatile flash memories.

Wherein, described radio wave receiver is arranged on the mainboard of computing machine and by bus and links to each other with CMOS.

Wherein, the device of described backup of CMOS data is arranged on the mainboard of computing machine and by bus and links to each other with CMOS.

Wherein, described radio wave receiver is a slice circuit of single-chip integrated.

Another purpose of the present utility model provides the mainboard and the computing machine of this real-time clock system of application.

The utility model provides a kind of real-time clock system, and this system comprises CMOS, but and the device of the radio wave receiver of the acceptance criteria clock signal that is connected with CMOS respectively and backup of CMOS data.This radio wave receiver connects CMOS and calibrate the clock of CMOS when each start.The utility model also provides the mainboard and the computing machine of this real-time clock system of application.Use the utility model to overcome existing RTC module because power down causes the loss of data of CMOS storage or adopts crystal oscillator to cause the defective of inaccurate clock.

Description of drawings

Fig. 1 is the synoptic diagram of the real-time clock system among the utility model embodiment.

Fig. 2 is the workflow diagram of backup of CMOS 3 interior data among the utility model embodiment.

Main symbol implication:

1, radio wave receiver 2, Flash Rom

3、CMOS

Embodiment

Now, the utility model is further described according to accompanying drawing and in conjunction with embodiment.

Embodiment

Referring to shown in Figure 1, a preferred embodiment of the present utility model provides a kind of real-time clock system that is used for computing machine, this system comprises radio wave receiver 1 and Flash Rom 2 (flash memory 2) at least, described radio wave receiver 1 and Flash Rom 2 all are arranged on the mainboard of computing machine, wherein radio wave receiver 1 is the device that can receive the time reference signal that the time service center sent and this signal demodulation can be sent to CMOS 3, preferably, this radio wave receiver 1 is realized above-mentioned function with the form of a slice single-chip.

The principle of work of radio wave receiver is: by standard time clock time service center standard clock signal is encoded, utilize low frequency (such as 20KHz-80KHz) carrier system that standard clock signal is launched with ratio long wave.Radio wave receiver 1 receives this low frequency signal by the built-in miniature wireless aerial, clock signal after the demodulation.By such process, make all devices that receive this standard clock signal all keep high level of synchronization with the standard time clock at standard time clock time service center.

Flash Rom 2 is nonvolatile memories that do not rely on electric power, and it is connected with CMOS 3 by data bus, and its function is the data of back-up storage in CMOS 3.The workflow of data is referring to shown in Figure 2 in the backup of CMOS 3 in Flash Rom 2, and after computing machine was opened, bios program was carried out the oneself and detected 1 action, judges whether mistake of CMOS 3 data then, if not, then forwards the start oneself to and detects 2 modules; If, then further misjudgment mode bit.Carry out the data that will be kept among the Flash Rom 2 respectively according to the judgement of error condition position and be written into CMOS 3 or be written into the default definite value of BIOS, carry out the start oneself then and detect 2 modules.Starting up self examination 2 modules judge whether to revise data among the CMOS 3, if not, then the data of current C MOS 3 are returned and deposit among the Flash Rom 2; If, then revise the setting value of CMOS 3 and amended value returned and deposit among the Flash Rom 2, continue to carry out boot program at last.

Especially, present embodiment is changed CMOS3 power supply mode in the past, original powered battery mode is changed into by the power module of mainboard directly power.After can causing the computer main frame panel power-off although it is so, because of not having back-up source to cause BIOS setting data among the former CMOS of leaving in 3 to be lost for CMOS 3 power supply and the RTC internal clocking quits work.But CMOS 3 data of when starting shooting for the second time, utilizing aforesaid Flash Rom 2 to be backed up, when starting shooting for the second time, Backup Data is loaded among the CMOS 3 again, and by radio wave receiver 1, when starting shooting for the second time, read the standard clock signal that sends at standard time clock time service center with calibration.The mode that CMOS 3 adopts motherboard power supply directly to power has avoided long-term powered battery need change the problem of battery.

The workflow of the real-time clock system in the present embodiment is to receive and by its inner chip demodulation by the standard clock signal that radio wave receiver 1 sends standard time clock time service center, and then clock signal, clock signal can be sent to CMOS 3 by data bus.During computer booting, bios program is carried out when the oneself detects and can clock signal be read in and be written among the CMOS 3 by data bus.User application in the computer operating system environment can read the clock signal of radio wave receiver 1 equally by data bus simultaneously, and is accurate with the clock height that guarantees computing machine.

The above only is preferred embodiment of the present utility model, when not limiting the scope that the utility model is implemented with this.Be that all equalizations of being done according to the utility model claims change and modification, all should still belong in the utility model scope of patent protection.

Claims

1. a real-time clock system comprises CMOS, it is characterized in that, also comprises the radio wave receiver that is connected with CMOS respectively and the device of backup of CMOS data.

2. real-time clock as claimed in claim 1 system is characterized in that, described radio wave receiver is to receive standard clock signal that the time service center sent and the device that this clock signal demodulation can be sent to CMOS.

3. real-time clock as claimed in claim 1 system is characterized in that the device of described backup of CMOS data is non-volatile flash memories.

4. real-time clock as claimed in claim 1 system is characterized in that, described radio wave receiver is arranged on the mainboard of computing machine and by bus and links to each other with CMOS.

5. real-time clock as claimed in claim 1 system is characterized in that, the device of described backup of CMOS data is arranged on the mainboard of computing machine and by bus and links to each other with CMOS.

6. real-time clock as claimed in claim 4 system is characterized in that described radio wave receiver is a slice circuit of single-chip integrated.

7. a mainboard is characterized in that, described mainboard comprises each described real-time clock system of claim 1-6.

8. a computing machine is characterized in that, described computing machine comprises the described mainboard of claim 7.