JPH04123140A - Operation setting information backup circuit - Google Patents

Abstract

PURPOSE:To prevent the reference value from being lost at the time when a device is started first by holding operation setting information which is set at the time of initialization of the device and becomes a reference in a ROM, and making the contents of the ROM freely writable in a nonvolatile memory and a RAM. CONSTITUTION:The present state operation value of operation setting information to each function unit 2-1 is held in a RAM 13, and the contents of a nonvolatile memory 12 for backing up the operation setting information to each function unit 2-1 are made freely writable in the RAM 13. Accordingly, the contents of the RAM 13 not only can be set to the same as the backup contents of the nonvolatile memory 12 but also can be made different therefrom, therefore, management of the nonvolatile memory 12 to erroneous setting, etc., can be executed delicately. Also, operation setting information of default is held on a ROM 11, and the contents of the ROM 11 are made freely writable in the nonvolatile memory 12 and the RAM 13. In such a way, it can be prevented that a reference value at the time when the device is started first is lost.

Description

TECHNICAL FIELD The present invention relates to an operation setting information backup circuit, and more particularly to a method for backing up operation setting information set in a plurality of functions constituting an information processing apparatus.

Prior Art Conventionally, in this type of operation setting information backup method (as shown in FIG. 2, the terminal 3 connected to the device
to each functional unit 2-1 (i-01, . . . , N) (
For example, operation setting information set in a communication unit, etc.) is registered in a readable/writable nonvolatile memory (E2 FROM) 41 of the central processing unit 4.

In such a conventional backup method of operation setting information, the operation setting information for each functional unit 2-1 and the contents of the nonvolatile memory 41 are always transferred, so it is temporarily saved during testing when starting up the device. There is a drawback that the operation setting information set in 1 is retained in the nonvolatile memory 41, and the reference value (default value) when the device is first started up is lost.

Purpose of the Invention The present invention has been made in order to eliminate the drawbacks of the conventional ones as described above, and provides a backup method for operation setting information that can prevent reference values from being lost when the device is first started up. The purpose is to provide circuits.

Composition of the Invention The operation setting information backup circuit according to the present invention is an operation setting information backup circuit for an information processing apparatus that is constituted by a plurality of functional units each operating according to set operation setting information, a read-only non-volatile memory for storing reference operation setting information set at the time of setting; a storage means for temporarily storing the operation setting information set from the outside; and a read-only non-volatile memory for storing the reference information. a readable/writable non-volatile memory that stores the operation setting information of the storage means and the operation setting information of the storage means as backup information; A control means for controlling writing to the storage means and the readable and writable nonvolatile memory, and writing of the operation setting information of the storage means to the readable and writable nonvolatile memory. shall be.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In the figure, each functional unit 2-1 (i-0, 1,
. . . , N), the default value of the operation setting information is registered.

Nonvolatile memory that can be read and written (E' FROM)
12 backs up the operation setting information set in each functional unit 2-1, and a RAM (random access memory) 13 holds current information of the operation setting information of each functional unit 2-1.

Control program 14 includes ROMI 1 and non-volatile memory 1
2 and RAMI 3 respectively.

The bus interface 15 transfers the contents of the RAM 13 to the bus 10.
0 to each functional unit 2-1.

The operation of one embodiment of the present invention will be explained using FIG.

The control program 14 of the central processing unit 1 manages writing to the ROM II, nonvolatile memory 12, and RAM 13 when changing the operation settings for each functional unit 2-1 in accordance with an operation setting information change request from the terminal 3.

That is, the control program 14 changes settings for the operation setting information in the RAM 13, makes settings for each functional unit 2-11, copies the operation setting information held in the RAM 13 to the nonvolatile memory 12, and changes the settings for the operation setting information stored in the RAM 13.
Copying the operation setting information held in the RAM 13,
Controls copying of default values of operation setting information registered in ROMII to RAM 13 and nonvolatile memory 12.

The non-volatile memory 12 is controlled by the control program 14 to change settings for the operation setting information of the RAM 13 and to make settings for each functional unit 2-1.
The settings of each functional unit 2-1 can be changed without changing the operation setting information held in the function unit 2-1.

Further, by controlling the control program 14 to copy the operation setting information held in the RAM 13 to the nonvolatile memory 12, the operation setting information set on the RAM 13 can be registered in the nonvolatile memory 12.

Thereby, the backup contents of the nonvolatile memory 12 can be changed when the final result is determined.

Furthermore, the non-volatile memory 12 is controlled by the control program 14.
By controlling the operation setting information held in the RAM 13 to be copied to the RAM 13, the operation setting information for each functional unit 2-I set on the RAM 13 is transferred to the nonvolatile memory 1.
2, and the settings for each functional unit 2-1 can also be returned to the backup contents of the nonvolatile memory 120.

On the other hand, by controlling the control program 14 to copy the default values of the operation setting information registered in the ROMI 1 to the RAM 13 and the nonvolatile memory 12, the operation settings of the device can be changed to the settings when the device is started up for the first time.
That is, the settings can be easily returned to default values.

In this way, the current operating values of the operation setting information for each functional unit 2-1 are held in the RAM 13, and the contents of the nonvolatile memory 12 for backing up the operation setting information for each functional unit 2-1 can be freely written to the RAM 13. By doing this, it is possible to make the contents of the RAM 13 the same as the backup contents of the non-volatile memory 12, or to make them different, so it is possible to carefully manage the non-volatile memory 12 against misconfigurations, etc. I can do it.

In addition, default operation setting information is held on ROMI l, and the contents of ROMII are stored in non-volatile memory 12 and R
By making AM13 writeable,
It is possible to prevent the reference value from being lost when the device is first started up.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, as described in detail, the current operating values of the operation setting information for each functional unit are held in the RAM, and the contents of the nonvolatile memory for backing up the operation setting information for each functional unit are written to the RAM. In addition, the standard operation setting information set at the time of initial setup of the device is stored in the ROM, and the contents of the ROM can be freely written to the non-volatile memory and RAM. This has the effect of preventing loss of the reference value at startup.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of a conventional example. Explanation of symbols of main parts 1...Central processing unit 2-1 to 2-N...Functional unit 3...
・Terminal 11...ROM 12...Nonvolatile memory 13...RAM 14...Control program

Claims (1)

[Claims] (1) An operation setting information backup circuit for an information processing device that is composed of a plurality of functional units that each operate according to set operation setting information, the operation setting being a standard set at the time of initial setting of the information processing device. a read-only nonvolatile memory for storing information; a storage means for temporarily storing the operation setting information set from the outside; and a storage means for temporarily storing the operation setting information set from the outside; a readable/writable nonvolatile memory for storing operation setting information as backup information; a storage means for the operation setting information serving as the reference for the read-only nonvolatile memory in accordance with an external instruction; and the readable/writable nonvolatile memory. 1. An operation setting information backup circuit comprising: control means for controlling writing to a static memory and writing of the operation setting information of the storage means to the readable and writable nonvolatile memory.