JPH03292542A - Information processor - Google Patents

Abstract

PURPOSE:To prevent the increase of the signal lines and the complication of wiring in an information processor by selecting the data stored in a register forming a scan path, the data given from a circuit of the precedent stage, or the intra-module information excluding the data held in the register and sending the selected data to a circuit of the next stage as the scan-out data. CONSTITUTION:The selection circuits 12 and 22 of the modules 1 and 2 select the data given from the scan paths 10 and 20, the data given from the output circuits 11 and 21, or the data given from the communication paths 100 and 101 in response to the request signals received from a diagnostic processor 3. Then the selected data are outputted as the scan-out data. Therefore the intra-module information excluding the scan path data on both modules 1 and 2 can be transferred to the processor 3 via the communication paths 101 and 102 connected to the paths 10 and 20. Thus it is possible to prevent the increase of the number of signal lines set between the modules 1/2 and the processor 3 and to evade the complication of the wiring for an information processor.

Description

TECHNICAL FIELD The present invention relates to an information processing apparatus, and more particularly to data transfer between a diagnostic processor and a module in an information processing apparatus composed of a plurality of modules.

BACKGROUND ART Conventionally, in this type of information processing apparatus, a scan canvas is provided in which all the registers in the apparatus are connected in series, and data in each register is read out by this scan canvas.

In an information processing device having the above-described scan path configuration, when intra-module information other than scan path data, such as information such as temperature abnormality within a module, is transferred between each module and the diagnostic processor, each module and the diagnostic processor This was done using a dedicated communication means for data transfer provided between the two locations.

In such conventional information processing devices, the transfer of information within the module other than scan path data between each module composing the device and the diagnostic processor was achieved using a communication means dedicated to data transfer. The disadvantage is that the number of signal lines increases and the wiring becomes complicated.

Purpose of the Invention The present invention was made in order to eliminate the drawbacks of the conventional ones as described above, and an object of the present invention is to provide an information processing device that can prevent an increase in the number of signal lines in the device and a complicated wiring. .

Configuration of the Invention An information processing device according to the present invention is an information processing device having a scan canvas configured of a plurality of registers in a plurality of modules, and which holds information within the module other than data held in the plurality of registers. a retaining means for
Selection of selecting one of the data from the preceding circuit, the data from the plurality of registers, and the module internal information held in the holding means, and sending the selected data to the subsequent circuit as scan-out data. means is provided in each of the plurality of modules.

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, within modules 1 and 2, there is a scan canvas 10.
20, an intra-module information output circuit (hereinafter referred to as an output circuit) IL 21 that outputs internal module information other than the data of this scan canvas 10.20 to the outside, and data input via the communication bus 100.101. , the data from the scan canvas 10.20 and the data from the output circuit 11.21 are selected in response to the request signals 103, 104 from the diagnostic processor 3, and the selected data is sent to the module 1, Selection circuit 12.2 outputs to communication buses 101 and 102 as scan-out data of 2.
2 is provided.

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

When the diagnostic processor 3 requests the scan canvas data in the modules 1 and 2, the selection circuit 12.22 in the module 1.2 receives the request signal 10 from the diagnostic processor 3.
3 and 104 respectively select data from scan canvas 10.20.

Therefore, data in the scan canvas 10 of the module 1 passes through the selection circuit 12 and the communication bus 101 to the module 2.
The data is transferred to the scan canvas 20 of the module 2 via the selection circuit 22 and the communication bus 102 to the diagnostic processor 3 following the data in the scan canvas 20 of the module 2.

Next, when the diagnostic processor 3 requests module information other than the scan path data of the module 1, the selection circuit 12 in the module 1 selects the data from the output circuit 11 based on the request signal 103 from the diagnostic processor 3. The selection circuit 22 in the module 2 is connected to the diagnostic processor 3.
A pig input via the communication bus 101 is selected in response to a request signal 104 from the communication bus 101 .

Therefore, data from the output circuit 11 of the module 1 passes through the selection circuit 12 and the communication bus 101 to the module 2.
is input.

At this time, the selection circuit 22 of the module 2
1, the data from the output circuit 11 of module 1 is sent to scan canvas 2.
0 and is sent to the diagnostic processor 3 via the selection circuit 22 and the communication bus 102.

As a result, the intra-module information other than the scan path data of module 1 is transferred to the diagnostic processor 3, bypassing the scan path 20 of module 2.

Note that information in the module other than the scan path data of the module 2 can also be processed in the same manner as described above by causing the selection circuit 22 to select data from the output circuit 21 in response to the request signal 104 from the diagnostic processor 3. It can also be transferred to the diagnostic processor 3.

In this way, the selection circuits 12.22 of the modules 1, 2 communicate data from the scan canvas 10.20 and data from the output circuit 11.21 in response to request signals 103.104 from the diagnostic processor 3. By selecting one of the data input from buses 100 and 101 and outputting it as scan path out data, the information in the module other than the scan path data of module 1.2 can be transferred to scan path 10.20. can be transferred to the diagnostic processor 3 via a communication bus 101.102 connected to the diagnostic processor 3.

Therefore, it is possible to prevent the number of signal lines between the modules 1 and 2 and the diagnostic processor 3 from increasing and from complicating the wiring.

As described in detail, according to the present invention, one of data from a register configuring a scan path, data from a preceding circuit, and information within a module other than the data held in the register. By selecting the data and sending the data to the subsequent circuit as scan-out data, it is possible to prevent an increase in the number of signal lines within the device and to prevent the wiring from becoming complicated.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. Explanation of symbols of main parts 1.2...Module 3...Diagnostic processor 10.20...Scan path 11.12...Module internal information output circuit 12
．． 22...Selection circuit

Claims (1)

[Claims] (1) An information processing device having a scan path configured by a plurality of registers in a plurality of modules, including a holding means for holding information within the module other than data held in the plurality of registers, and a preceding circuit. , data from the plurality of registers, and intra-module information held in the holding means,
An information processing apparatus characterized in that each of the plurality of modules is provided with a selection means for sending the data as scan-out data to a subsequent circuit.