JPH06249927A - Electronic circuit device - Google Patents

Abstract

PURPOSE:To provide an electronic circuit device wherein the time required for inspecting a function and an inspection jig are reduced. CONSTITUTION:An electronic circuit device 1 is constituted by connecting a jumper switch means 4 which selects whether a self-diagnostic mode and an ordinary operating mode can be changed over, an electrically reqritable erasable storage means 3 which has stored data corresponding to the self-diagnosis mode and the ordinary operating mode and a display means 5 which displays the result of a self-diagnosis by the self-diagnosis mode to a selection and execution means 2. The selection and execution means 2 discriminates whether the two modes can be changed over or not depending on the connection state of the jumper switch means 4, it expands an access range with reference to the electrically rewritable erasable storage means when they can be changed over, it narrows the access range when they cannot be changed over, it accesses data from the electrically rewritable erasable storage means, and it selects and executes either the self-diagnosis mode or the ordinary operating mode by using the accessed data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic circuit device having a self-diagnosis function.

[0002]

2. Description of the Related Art Generally, it is necessary for an electronic circuit device to carry out a function test for confirming whether or not there is a defect in normal operation after completion of the device.

[0003]

However, there is a problem that a great amount of time and a jig for inspection are required to perform the above-mentioned function inspection. The present invention has been made in view of the above problems, and an object of the present invention is to provide an electronic circuit device that reduces the time required for the function inspection and the inspection jig.

[0004]

In order to achieve the above object, the present invention provides jumper switch means for selecting whether to switch between a self-diagnosis mode and a normal operation mode, and a self-diagnosis mode and a normal operation mode. Electrically rewritable and erasable storage means storing corresponding data, display means for displaying a self-diagnosis result in the self-diagnosis mode, and whether or not the self-diagnosis mode and the normal operation mode can be switched depending on the connection state of the jumper switch means. When the switch is possible, the calling range for the electrically rewritable and erasable storage means is widened, and when the switch is not possible, the calling range is narrowed.
Recall data from storage means that can be electrically rewritten,
An electronic circuit device comprising selection execution means for selecting and executing either a self-diagnosis mode or a normal operation mode according to the called data, wherein the selection execution means is a result of self-diagnosis in the self-diagnosis mode. Is displayed on the display means, and if there is no problem, the stored contents of the electrically rewritable erasable storage means are rewritten to data corresponding to the normal operation mode.

[0005]

In the configuration of the present invention, jumper switch means for selecting whether to switch between the self-diagnosis mode and the normal operation mode, and the electric rewritable and erasable data storing the data corresponding to the self-diagnosis mode and the normal operation mode can be erased. The storage means, the display means for displaying the self-diagnosis result in the self-diagnosis mode, and the jumper switch means are connected to determine whether the self-diagnosis mode and the normal operation mode can be switched. The call range for the rewritable and erasable storage means is widened, and the call range is narrowed when switching is not possible. Data is called from the electrically rewritable and erasable storage means, and the self-diagnosis mode and the normal operation mode are selected according to the called data. An electronic circuit device comprising a selection executing unit for selecting and executing any one of the selection units, wherein the selection executing unit is a self-diagnosis module. The result of self-diagnosis by the computer is displayed on the display means, and if there is no problem, the contents stored in the electrically rewritable storage means are rewritten to the data corresponding to the normal operation mode. The self-diagnosis mode and the normal operation mode can be selected and executed from the connection state of the switch means and the data called from the electrically rewritable and erasable storage means. That is, the electronic circuit device operates in the self-diagnosis mode in the function test to perform the function test of itself, and operates in the normal operation mode after the function test is completed, thereby reducing the time required for the function test and the inspection jig. can do. Also, after confirming that there is no malfunction in the electronic circuit device by self-diagnosis, by always turning off the connection state of the jumper switch means, the electronic circuit device can be operated in the normal operation mode without fail. Even if the connection state of the jumper switch means is not turned off at the time of reset, since the stored contents of the electrically rewritable and erasable storage means are rewritten to the data corresponding to the normal operation mode, the electronic circuit device must be It works in the normal operation mode and prevents accidentally operating in the self-diagnosis mode.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a system block diagram in this embodiment. The electronic circuit device 1 includes a selection executing means 2, an electrically rewritable and erasable storage means 3, a jumper switch means 4 and a display means 5, and has two operation modes of a self-diagnosis mode and a normal operation mode. The actual electronic circuit device 1 has an electronic circuit board unit 1 including a microcomputer 6 as shown in FIG. 2, for example.
Further, the selection executing means 2 is constituted by the microcomputer 6 for performing various control / processing of the electronic circuit board unit 1, and EEPRO is used as the electrically rewritable and erasable storage means 3.
M is used as the jumper switch means 4, a jumper wire is used, and the display means 5 is, for example, a liquid crystal display device. Further, the electronic circuit board unit 1 is equipped with a setting switch section 7 for setting various specification data and an input / output section 8 for receiving a signal from the outside or sending a signal to the outside. There is. A program for executing various kinds of control / processing performed by the selection executing means 2 is built in the microcomputer 6 in advance.

The operation of the electronic circuit board unit 1 based on the program stored in the microcomputer 6 will be described with reference to the flowchart of FIG. First, in the electronic circuit board unit 1 to be subjected to the function inspection, a jig for function inspection is connected to the input / output section 8. Then, power is supplied to the electronic circuit board unit 1 to reset it (step 1), and the microcomputer 6 performs initial setting (step 2). Next, the microcomputer 6 checks the connection state of the jumper switch means 4 (step 3), and thereby switches the access range to the electrically rewritable and erasable storage means 3 composed of the EEPROM (steps 4 and 5).

Since the jumper switch means 4 remains connected until the electronic circuit board unit 1 is completed and the function inspection is completed, the microcomputer 6 sets a wide access range (step 4), and the set access range is set. The data is called from the electrically rewritable and erasable storage means 3 in accordance with (step 6), and either the self-diagnosis mode or the normal operation mode corresponding to the operation of the product in which the electronic circuit board unit 1 is finally incorporated is called by the called data Is selected (step 7). At the time when the function test is first performed, the electrically rewritable and erasable storage means 3 stores data corresponding to each of the self-diagnosis mode and the normal operation mode, and the microcomputer 6 stores the data in a wide access range. When called, the self-diagnosis mode is selected and the self-diagnosis of the electronic circuit board unit 1 is executed (step 8).

Electronic circuit board unit 1 by self-diagnosis
The presence / absence of the defect is checked (step 9), and if there is a defect, it is displayed on the display means 5 composed of a liquid crystal display device (step 10). If there is no problem, the stored contents of the electrically rewritable and erasable storage means 3 are rewritten to the data corresponding to the normal operation mode (step 11), and the completion of the self-diagnosis is displayed on the display means 5. (Step 12) End the self-diagnosis.

If it can be confirmed that there is no defect as a result of the self-diagnosis, it is not necessary to perform the self-diagnosis thereafter. Therefore, by disconnecting the jumper wire which is the jumper switch means 4, the access range to the electrically rewritable and erasable storage means 3 is set to be narrow every time the power is reset next time (step 5), and the microcomputer 6 is set. When the data is called in the narrow access range, the normal operation mode is selected and the normal operation mode is operated (step 13). Therefore, the electronic circuit board unit 1 always operates in the normal operation mode. . In the normal operation mode, an access range for calling the data for performing the normal operation from the electrically rewritable and erasable storage means 3 is set (step 14).

Further, when the function inspection of the electronic circuit board unit 1 is completed and it is confirmed that there is no malfunction, the power is reset again when the jumper wire which is the jumper switch means 4 is not disconnected. However, since the stored contents of the electrically rewritable and erasable storage means 3 are rewritten with the data corresponding to the normal operation mode, the electronic circuit board unit 1 always operates in the normal operation mode.

The concept of the present invention can be applied not only to the electronic circuit board unit as in the present embodiment, but also to all electronic circuit devices including an electronic circuit having a microcomputer as a constituent element. .

[0013]

According to the present invention, jumper switch means for selecting whether to switch between the self-diagnosis mode and the normal operation mode, and the electric rewritable and erasable data storing the data corresponding to the self-diagnosis mode and the normal operation mode can be erased. The storage means, the display means for displaying the self-diagnosis result in the self-diagnosis mode, and the jumper switch means are connected to determine whether the self-diagnosis mode and the normal operation mode can be switched. The call range for the rewritable and erasable storage means is widened, and the call range is narrowed when switching is not possible. Data is called from the electrically rewritable and erasable storage means, and the self-diagnosis mode and the normal operation mode are selected according to the called data. An electronic circuit device comprising: selection executing means for selecting and executing any one of the electronic circuit devices, wherein the selecting executing means is a self-diagnosis mode. The result of self-diagnosis is displayed on the display means and the stored contents of the electrically rewritable and erasable storage means are rewritten to the data corresponding to the normal operation mode if there is no problem. It becomes possible to select and execute the self-diagnosis mode and the normal operation mode from the connection state of the means and the data called from the electrically rewritable erasable storage means, and the electronic circuit device executes the self-diagnosis in the self-diagnosis mode. By performing the function inspection of itself by itself, there is an effect that a great inspection time required for the function inspection, an inspection jig and the like can be reduced.

After confirming that the electronic circuit device has no problem by self-diagnosis, the connection state of the jumper switch means is always turned off so that the electronic circuit device always operates in the normal operation mode. Even if the connection state of the jumper switch means is not turned off at the time of reset, since the stored contents of the electrically rewritable and erasable storage means are rewritten to the data corresponding to the normal operation mode, the electronic circuit device must be It operates in the normal operation mode. As a result, it is possible to prevent the electronic circuit device from accidentally entering the self-diagnosis mode after confirming that there is no malfunction as a result of the self-diagnosis.

[Brief description of drawings]

FIG. 1 is a system block diagram of the present invention.

FIG. 2 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 3 is a flowchart illustrating an operation of the above.

[Explanation of symbols]

 1 electronic circuit device 2 selection execution means 3 electrical rewritable erasable storage means 4 jumper switch means 5 display means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoaki Izumimoto 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (1)

[Claims] 1. A jumper switch means for selecting whether to switch between a self-diagnosis mode and a normal operation mode, and an electrically rewritable and erasable storage means for storing data corresponding to the self-diagnosis mode and the normal operation mode. Whether the self-diagnosis mode and the normal operation mode can be switched or not is determined by the connection state of the display means for displaying the self-diagnosis result in the self-diagnosis mode and the jumper switch means, and when the switching is possible, the electric rewriting can be erased. The call range to the storage means is widened, and the call range is narrowed when switching is not possible, data is called from the electrically rewritable and erasable storage means, and either the self-diagnosis mode or the normal operation mode is selected depending on the called data. And a selection execution unit that executes the self-diagnosis mode. The electronic circuit device is characterized in that the stored contents of the electrically rewritable and erasable storage means are rewritten to data corresponding to the normal operation mode when there is no problem.