JPH01156683A - Self-diagnosing system for electronic circuit package - Google Patents

Abstract

PURPOSE:To surely select a fault package and to independently execute a diagnosis irrespective of whether other package exists or not and a fault by providing a self-diagnosing circuit of a package on each of electronic circuit packages. CONSTITUTION:Each of electronic circuit packages is provided with an external interface part 4 for executing a detection of a diagnosis executing instruction and a report of a result of diagnosis, a data part 6 for holding a diagnostic input data and an expected value data, a comparing part 12 for comparing a diagnostic output from a diagnostic object circuit 5 and the expected value data, and a diagnosis result detecting part 15 for detecting a result of comparison. Also, said package is constituted so that at the time of diagnosis, a switching part 13 and 14 are controlled by a control part 16, a diagnostic data of the data part 6 is inputted to the diagnostic object circuit 5, and also, the output is connected to the comparing part 12. In such a way, the package can be diagnosed independently from whether other package exists or not, and a fault.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an electronic circuit package self-diagnosis method.

[Conventional technology]

Conventionally, in this type of diagnostic method, a control package including a control circuit and memory actually operates other controlled packages, reads the operation results, and executes a program to compare them with expected values prepared in advance. I am doing it.

[Problem that the invention seeks to solve]

In the conventional diagnostic method described above, in order to cause the controlled package, that is, the package to be diagnosed, to perform an actual functional operation, when the function extends to multiple packages,
There are multiple suspect packages. Further, when the interface between the control package and the controlled package becomes a failure, it is not possible to select which package is the failure. Furthermore, the control package itself cannot be diagnosed. Further, when a failure occurs that makes it impossible to execute the program of the control package, the controlled package cannot be diagnosed.

[Means for solving problems]

The electronic circuit package self-diagnosis method of the present invention includes, for each of a plurality of electronic circuit packages constituting an electronic device, an external interface unit that detects a diagnosis execution instruction from outside the package and reports the diagnosis result to the outside of the package. a data section that holds input data to a circuit to be diagnosed in a package and expected value data of an output from the circuit to be diagnosed; an input section for inputting data to the circuit to be diagnosed; and an output from the circuit to be diagnosed. a comparison unit that compares data and expected value data; a switching unit that switches between connecting the input and output of the circuit to be diagnosed to another package, the input unit, and the comparison unit; This configuration includes a diagnosis result detection section that detects the comparison result of the comparison section, and a control section that controls the operation of each of the sections.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

Referring to FIG. 1 showing one embodiment, a diagnosis instruction key 1 is a key for instructing the package to perform self-diagnosis from outside the package. Display parts 2 and 3 indicate whether the diagnosis result is good or not.
Show defects. The external interface section 4 detects a diagnosis instruction from the diagnosis instruction key 1 and instructs the display section 2.3 to display the diagnosis result. The circuit to be diagnosed 5 is a circuit to be diagnosed within the package, and usually controls a predetermined function of the electronic device. The data section 6 holds expected value data of input data and output data for diagnosing the diagnosis target time i5. Input signal 7 is an input signal from another package.

Output signal 8 is an output signal to other packages. The receiving section receives the input signal 7. The transmitter 10 transmits an output signal 8. The input section 11 reads input data from the data section 6 and inputs it to the circuit 5 to be diagnosed. The comparison section 12 performs a comparison check between the expected value data of the data section 6 and the output data of the circuit to be diagnosed 5. The switching unit 13 switches which of the receiving unit 9 and the input unit 11 the input to the circuit to be diagnosed 5 is connected to. The switching unit 14 transmits the output of the circuit 5 to be diagnosed to the transmitting unit 1.
0 or comparison unit 12. The diagnosis result detection unit 15 is the final input data detection and comparison unit 1
Detect discrepancies in the comparison results in step 2. The control section 16 controls the operation of each section.

During normal operation, that is, when no diagnosis is being performed, the circuit to be diagnosed 5 is connected to other packages via the receiving section 9 and the transmitting section 10, and performs a predetermined function of the electronic device. When diagnosis instruction key 1 is turned on at the time of starting diagnosis, external interface section 4 detects a diagnosis start instruction and transmits it to control section 16 . When the control unit 16 detects a diagnosis start instruction from the external interface unit 4, it sends a switching instruction to the switching unit 13 and the switching unit 14, and transfers the input of the circuit to be diagnosed 5 from the receiving unit 9 to the input unit 11, and The output is switched from the transmitter 10 to the comparator 12. After that, the control section 16 controls the input section 11
Then, the comparator 12 is activated, and the circuit 5 to be diagnosed is diagnosed using the data in the data section 6. Diagnosis result detection unit 15
When detecting the final diagnostic data or detecting a data mismatch in the comparison section 12, it transmits the detection result to the control section 16.

The control unit 16 sends the detection results to the external interface unit 4.
The external interface section 4 lights up the display section 2 during normal conditions and lights up the display section 3 during abnormal conditions.

FIG. 2 shows an example of an electronic device having a plurality of packages configured as described above. In the figure, electronic device 2
1 includes a plurality of packages 22, 23, and 24. These packages 22, 23, 24 have signal lines 25, 26
．． 27, respectively.

〔Effect of the invention〕

As described above, according to the present invention, a faulty package can be reliably selected by self-diagnosing each electronic circuit package. In addition, diagnosis can be performed independently regardless of the presence or absence of other packages or failures.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 are diagrams showing one embodiment of the present invention. 1...Diagnosis instruction key, 2.3...Display section, 4...
External interface section, 5...Diagnostic heavy circuit, 6.
...data section, 7...input signal, 8...output signal,
9... Receiving section, 11... Input section, 12... Comparing section, 13.14... Switching section, 15... Diagnosis result detection section, 16... Control section, 21... electronic equipment, 22, 23
．． 24...Package. Agent Patent Attorney Uchihara Oto Figure 1

Claims (1)

[Claims] Each of the multiple electronic circuit packages that make up the electronic device has an external interface section that detects a diagnosis execution instruction from outside the package and reports the diagnosis results to the outside of the package, and an external interface section that receives input data to the circuit to be diagnosed inside the package. and an input section for inputting data to the circuit to be diagnosed; and a comparison for comparing the output data from the circuit to be diagnosed and the expected value data. a switching unit that switches between connecting the input and output of the circuit to be diagnosed to another package, the input unit, and the comparison unit; and a diagnosis result that detects the end of the diagnosis and the comparison result of the comparison unit. An electronic circuit package self-diagnosis method comprising: a detection section; and a control section that controls the operation of each of the sections.