JPH06187195A - Setting control system - Google Patents

Abstract

PURPOSE:To perform the initial setting of an LSI by a few external terminals. CONSTITUTION:Basic setting data 41 which can not be rewritten to be set in an LSI 6, external setting enabling data 42 which can be rewritten by an external command, and maintenance data 43 of the LSI 6 are held in a backup memory 4. The memory 4 and the LSI 6 are provided in the same device. The external setting enabling data 4 in the memory 4 are changed according to the external instruction. The basic setting data 41 and the external setting enabling data 42 in the memory 4 are set in the LSI 6 in response to throwing-in of the power supply of the LSI 6. Thus, the setting of the SLI 6 can be attained by a few terminals, and the external setting enabling data 42 can be rewritten. And also, the LSI 6 and the maintenance data 43 are always existed in the same device, so that maintenance can be simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a setting control system, and more particularly to a setting control system for a large-scale integrated circuit (hereinafter referred to as LSI) generally used in digital signal processing devices.

[0002]

2. Description of the Related Art When implementing a digital signal processing circuit,
It is generally realized as a large-scale integrated circuit in which many functions are integrated.

Since LSI integrates many functions, it is often necessary to set or switch the functions and operations by externally setting the functions. There are two types of settings, one is universal as a device-specific setting when the device is started up and the other is that the setting is changed later depending on the usage conditions.

On the other hand, the apparatus has various maintenance data which should be kept in association with the apparatus as a history unique to the apparatus during the maintenance work.

As shown in FIG. 2, conventionally, regarding the setting unique to the device, the setting signal 8 is extracted outside the LSI 6 by the kind of the necessary setting, and the setting terminal 9 is connected or not connected. As a result, the logic of the setting signal 8 is specified, and the functions of the circuits 7-1 to 7-n in the LSI are determined.

Although this external setting is performed from the external control device 10 via the external control interface 3, the setting state in the LSI 6 is initialized by a power-on reset or the like, so that the external control device 10 is set in each LSI. The setting state was recorded in the backup memory 101 without omission, and downloaded when the device was started up.

Furthermore, the maintenance history and the like of each device must rely on the external control device, and when the device including this LSI is separated from the external control device 10 and installed in another place, the external control device The relationship with the history data unique to the apparatus recorded in the backup memory 101 in the device 10 was interrupted, and it was impossible to hold the history data unique to the apparatus in close contact with the apparatus.

Nowadays, as the digital signal processing device becomes more and more complex, the functions integrated in one LSI are becoming more and more. In addition, even with one device, it is necessary to change various settings after installation depending on the conditions used. Accordingly, the number of setting signals 8 in the above conventional example also tends to increase. Although the number of terminals as a whole increases as the density of LSIs increases, the increase in the number of terminals as an LSI is limited, and a device for reducing the number of necessary terminals has been expected.

Further, as the functions required of the device itself become more complicated, there is a demand to make the device economically effective by standardizing and sharing the device. This means that there will be more and more setting information and control information. For this reason, the functions required of the external control device at the time of startup of the device are becoming larger and larger, and it tends to be impossible to operate the device without a complicated external control device.

Further, the amount of data relating to the maintenance and management of complicated devices also becomes huge, and it becomes extremely difficult to associate the maintenance data with each device without a large-scale centralized management system. was there.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks, and an object thereof is to provide a setting control system capable of setting an LSI with a small number of terminals.

[0012]

A setting control system according to the present invention comprises a non-volatile memory for holding non-rewritable basic data to be set in an integrated circuit and settable data rewritable by an external command, and the memory according to the external command. And a setting control circuit for setting the data in the memory in the integrated circuit in response to power-on of the integrated circuit.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of an apparatus adopting the setting control system according to the present invention.
In the figure, the system according to the present embodiment includes an electrically erasable backup memory 4 and an external system that receives various setting data and maintenance data from an external system that monitors and controls the device and transfers them to a setting control circuit in the device. Interface 3 and
A power-on reset circuit 2 that outputs a reset signal,
Between the backup memory 4 and the interface 3 and between the backup memory 4 and the interface 3 and the timing generation circuit 5 for generating the data transfer timing signal 51 for transferring various setting data in the backup memory 4 to the LSI 6. And a setting control circuit 1 for controlling the data transfer in the above.

A command analyzing means 11 for identifying a command request and a power-on reset request from the external interface 3 is provided in the setting control circuit 1, and an address is generated when each data in the backup memory 4 is transferred. Address generating means 12 for 1
Reference numeral 4 is a setting control data bus, and 40 is an LSI setting data bus.

Furthermore, the basic setting data of the LSI 6,
The externally settable data 42 and the maintenance data 43 are divided and stored in different addresses in the same backup memory 4. The backup memory 4
Has a backup power supply (not shown) and has a function as a non-volatile memory for holding the stored contents.

That is, in this example, an electrically erasable backup memory (hereinafter, simply referred to as a backup memory) 4 is installed in the apparatus, and in this backup memory 4, initial basic settings unique to the apparatus and universal basic settings are made. Data 41
And externally settable data 42 which has initial setting values, but which is changed by a maintenance person later depending on the operating conditions of the device,
Further, the address and the maintenance data 43 for recording the maintenance management data and the maintenance history of each device are recorded separately.

The basic setting data 41 is data which is recorded at the time of manufacturing the device and is not changed in operation thereafter. The externally settable data 42 is data updated by the setting control circuit 1 by a setting command via the external control interface 3. The maintenance data 43 is also data that is recorded and read out at any time during the maintenance process via the external control interface 3.

In such a configuration, in the case of normal power-on, the power-on reset circuit 2 operates and requests the setting control circuit 1 to download the basic setting data 41 and the externally settable data 42. The setting control circuit 1 recognizes the request from the power-on reset circuit 2 by the command analysis means 11, activates the timing generation circuit 5 and the address generation means 12 in response to this request, and sets the basic setting data 41 in the backup memory 4. By outputting the address signal 13 corresponding to the area in which the externally settable data 42 are stored, these setting data are written in the LSI 6 via the bus 40.

The externally settable data 42 in the backup memory 4 is input via the external control interface 3 in the apparatus by data transfer from a monitoring / control system (not shown) and written by the operation of the setting control circuit 1. At the same time, it is set in the LSI 6. This externally configurable data 4
2 is stored by the backup memory 4 in the device even if the power supply to the device is cut off. Therefore, at the time of subsequent power-on reset, the device 6 can be operated independently by the power-on reset operation without intervention of the monitoring / control system. Can be reset.

In response to a data transfer request from the external control interface, the setting control circuit 1 outputs only the address corresponding to the recording area of the externally settable data 42 of the backup memory 4, so that the basic setting data 41 unique to the apparatus is universal. Is never rewritten.

The maintenance data 43 is the externally settable data 42.
Similarly, write control and read control from the monitoring / control system allow downloading and uploading from the monitoring / control system. The maintenance data 43 and the externally settable data 42 are identified by a command from the monitoring / control system. That is, when the command analysis unit 11 in the setting control circuit 1 analyzes the command and the address generation unit 12 generates the address to be read / written, only the address in the recording range corresponding to each control is output.

As described above, the basic setting data of the LSI,
By providing a memory for externally settable data and maintenance data in the device, a large amount of setting operation required for the device can be performed by the LSI.
It can be realized without increasing the number of setting terminals. In addition to setting data unique to each device, setting data from the outside can be stored in the device, and device startup can be completed without relying on an external monitoring / control device.

Further, the maintenance history of each device, which could not be realized without a centralized and large-scale device management system,
By handling equipment management such as inventory as maintenance data attached to each device, detailed device management and maintenance management becomes possible. That is, according to the present invention, each setting data required for the LSI and the maintenance data to be recorded accompanying the device in maintenance operation can be recorded by one backup memory mounted in the device.

[0025]

As described above, according to the present invention, setting data is held in the non-volatile memory, and this data is set in the integrated circuit when the integrated circuit is powered on. There is an effect that the setting data can be set and the latest setting data can always be held. Further, by providing the integrated circuit and the non-volatile memory holding the maintenance data in the same device, there is an effect that maintenance management becomes easy.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a setting control system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a conventional setting control system.

[Explanation of symbols]

 1 Setting control circuit 4 Backup memory 6 LSI

Claims (2)

[Claims] 1. A non-volatile memory for holding non-rewritable basic data to be set in an integrated circuit and settable data rewritable by an external command, and changing the settable data in the memory according to the external command. A setting control system comprising: a changing unit; and a setting control circuit that sets data in the memory in the integrated circuit in response to power-on of the integrated circuit. 2. A setting control system comprising an integrated circuit and a non-volatile memory for holding setting data to be set in the integrated circuit and maintenance data for the integrated circuit in the same device.