JPS637063A - Data backup system - Google Patents

Abstract

PURPOSE:To prevent a processing time from being delayed even when the frequency of the write of data to be taken as a backup, is increased, by taking the backup of inputted data for an EEPROM after once writing it in a RAM, CONSTITUTION:The data sent from a console 26 becomes the data regarding the setting of a hardware 28, and is stored transiently at a RAM14. The data stored in the RAM14 is always monitored by a RAMEEPROM control software 16, and the data is taken as the backup of an EEPROM12. In other words, the RAN-EEPROM control software 18 judges whether the data in the EEPROM 12 is the same data stored in the RAM14 at that time or not, and when they are the same data, the data is maintained, and when they are different, the data in the EEPROM12 is rewritten to the data stored in the RAM14. In such way, the latest data stored in the RAM14 is taken as the backup for the EEPROM12.

Description

[Detailed Description of the Invention] Overview In a system where externally input data is set in hardware, when backing up the data using an EEPROM, it is necessary to first transfer the data to a RAM with a short writing time. After writing, it is transferred to EEPROM, which means that the writing time is long.
Writing to OM is excluded from the main routine to enable quick processing.

INDUSTRIAL APPLICATION FIELD The present invention relates to a data backup method using an EEPROM.

Systems that configure hardware based on input data, such as channel banks in the field of communications, which have the function of sending multiple subscriber lines together to an exchange, are equipped with a system that configures hardware based on input data. Since it will be necessary to reconfigure data related to line conditions, etc., it is desirable to back up the latest input data. In recent years, EEPROM (ELE) has become a suitable element for such backup systems.
ctri-cally erasable progr
amable read'only memory:
Electrically erasable and writable ROM (ROM) is attracting attention, and optimal methods of use are being sought.

2. Description of the Related Art Conventionally, as shown in the concept of this type of backup system, as shown in FIG. was writing data. FIG. 5 shows an outline of a flowchart regarding this data writing. If it becomes necessary to back up this data during the main routine processing in which data is written to the hardware in step 100, this data is written directly to the EEPROM 12 in step 101. Since this writing normally requires 10+as per byte, the EEPROM fixing time is set in accordance with the amount of data to be read in step 102, and the process returns to step 1031--the original main routine processing.

Problems to be Solved by the Invention However, in the backup system described above, the EEPROM is
Since it is necessary to incorporate the writing time into the main routine, a large processing time delay may occur depending on the writing frequency.

This problem is particularly serious in the field of communication that requires high speed, such as channel banks.

The present invention was created in view of these circumstances, and aims to propose a data backup method that does not cause delays in processing time even if the frequency of writing data to be backed up increases. .

Means for Solving the Problems FIG. 1 shows a conceptual diagram of the present invention. 10 is setting management software having a main routine program for setting input data to hardware, and 14 is a RAM (random access memory) into which the input data from the software 10 is temporarily written. 12 is R
EE with storage capacity equal to or larger than AM14
PROM, and 16 compares the data written in the EEPROM 12 with the data written in the previous FJRAM 14, and when these data are different, the EE is
This is RAM-EEPROM management software that updates data in PROM 12 to data in RAM 14. Then, the configuration management software 10 and RAM-EEPR
Since the OM management software 16 is executed by the same microprocessor, for example, it is monitored by a real-time monitor 18 and time-sharing processing is performed.

According to the present invention, input data is once written to RAM and then back to EEPROM! Since the main routine process for setting data in hardware does not need to be written to the EEPROM, processing time delays are eliminated.

EXAMPLES Hereinafter, the present invention will be explained in more detail by showing preferred examples.

Referring to FIG. 2, a partial block diagram of a switching system to which the present invention can be applied is shown. 20
is a channel bank, a predetermined number of subscribers 22 such as telephones are connected to its input side, and an exchange 24 is connected to its output side. The channel bank 20 has the function of collectively sending signals from multiple subscribers 22 to the exchange 24, and normally its transmission characteristics, such as cable level and impedance, are determined by the hardware of the part corresponding to each subscriber 22. It is set by adjusting the clothing. This hardware setting can be performed directly within the channel bank 20, but in this embodiment, it can be remotely controlled using an external console 26.

FIG. 3 is a block diagram of the channel bank 20 and the console 26, and 28 is hardware that performs the above-described functions of the channel bank 20. The setting management software 10 for setting the hardware 28 to various conditions is divided into a sending/receiving task 30 and a setting task 32. The data sent from the console 26 is first removed from data used only for sending and receiving by the sending/receiving task 30, that is, becomes data related to the settings of the hardware 28, and is sent to the setting task 32. The configuration task 32 uses this data to configure the hardware 28.
In addition to setting the transmission characteristics etc. of the
14 to memorize it once.

The data stored in RAM14 is RAM-EEPRO
The M tube is constantly monitored by the software 16, and this data is buffered in the EEPROM 12. Soku no 5,
RAM-EEFROM management/'7ware 16 is EE
It is determined whether the data in PROM12 is the same as the data currently stored in RAM14, and if it is the same, the data is maintained; if it is different, it is
The data in EPROM12 is rewritten to the data stored in RAM14. By doing this, the EEPRO
The latest data stored in the RAM 14 is always backed up to Ml2.

In this case, writing electrical data to EEPROMl2 usually requires 10m5 per byte, so
RAM14 updated at intervals shorter than this time
Although the data in the EEPROM 12 will not be backed up to the EEPROM 12, this does not cause any problem because such frequent resetting of the hardware 28 is not normally performed in the case of a channel bank.

The functions of the channel bank 20 described above are achieved by using a conventional microprocessor, in which case:
The setting management software 10 and the RAM-EEFROM management software 16 are monitored by a real-time monitor 18, and normal TSS (time sharing system) processing is performed.

In this way, in this embodiment, the data backup processing to the EEPROM 12 is excluded from the main routine work of the channel bank 20, that is, the routine work for setting various data in the hardware 28. This eliminates problems caused by data fixation time.

As described in detail, the present invention has the effect of eliminating the delay in system processing time caused by backing up data to an EEPROM.

[Brief explanation of the drawing]

FIG. 1 is a conceptual explanatory diagram of the present invention; FIG. 2 is a block diagram of an exchange system to which the present invention is applied; FIG. 3 is a block diagram of a channel bank in FIG. 2; , a conceptual explanatory diagram of a conventional backup system, FIG. 5 is a 70-day diagram regarding data writing in the backup system. 10...Setting management software, 12...EEPROM, 14...RAM
. 16...RAM-EEPROM tube immediate software, 1
8... Real-time monitor, 20... Channel bank, 26... Console. Conceptual diagram of the present invention FIG. 1 Block configuration diagram of an exchange system to which the present invention is applied FIG. 2 Flowchart related to conventional data writing FIG. 5

Claims (1)

[Claims] In a system that sets data input from the outside into hardware, the latest input data is once written to a RAM (14), and the data is stored in a memory having the same size as or larger than that of the RAM (14). The data written in the capacitive electrically erasable and writable ROM (12) and the data written in the RAM (14) are compared, and if they are different, the data written in the ROM (12) is
) is updated to the data in the RAM (14), and this comparison update and data setting to the hardware are time-divisionally processed.