JPH0634713A - Inspection device for module operation - Google Patents

Abstract

PURPOSE:To facilitate confirmation of inferior function of parts after the parts are mounted on a substrate, shorten inspection time, save a memory exclusively for confirmation program, and reduce cost. CONSTITUTION:A program for confirming operation which confirms function of a DSP module 6 to be measured which is stored in MPU3 by a mode setting device 1 is selected and transferred to the MPU3. It is transferred to the DSP module 6 through a data communication signal line 7 from the MPU3, and when it is received by the DSP module 6, the control for confirming operation of the DSP module 6 which corresponds to the contents of the program for confirming operation is executed by the MPU3. The function of the DSP module 6 is confirmed and inspected by the MPU3 based on the contents of the program for confirming operation, and the results of the inspection are output an external output device 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection device for inspecting a function of a digital signal processing module, which is an object to be measured, of a predetermined measurement signal.

[0002]

2. Description of the Related Art Conventionally, board wiring of a DSP module, erroneous mounting of parts, defective soldering, DSPIC device, memory I
When confirming the operation of the C device, when confirming the operation in the inspection process of the assembly substrate on which these electronic components are mounted, a continuity test using a continuity checker on this substrate is performed, or an internal ROM is used. I had a self-diagnosis by a test program. That is, the operation of the entire system in which various electronic components are mounted on the board has been confirmed. Further, it is known that a memory built in the product body has a program for operation confirmation.

[0003]

However, with the method using the continuity tester as described above, it is difficult to find a defect inside the memory IC, which causes a system defect, resulting in a system product. Has also become a factor that deteriorates the yield of. In addition, it is difficult to insert a test pin of the continuity tester into a board with a high-density design, which makes the test impossible.

Further, when there are a large number of test points, it takes a long time to move the test pins, and it is impossible to shorten the inspection time. In addition, in the case where the memory built in the product body is provided with a program for operation confirmation to perform self-diagnosis of the product body, a program memory is necessary. Therefore, there is a drawback that the cost becomes high.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to easily confirm a defect in the function of an electronic component mounted on a board, shorten the inspection time, and save the memory for the confirmation program. It is an object of the present invention to provide a module operation inspection device that enables cost reduction and reduction of defective products due to the above.

[0006]

In order to achieve the above object, the present invention selects the predetermined program mode of the operation confirmation program for confirming the operation function of the digital signal processing module and selects the digital signal processing module. A program selection and transfer means for transferring to the digital signal module, and a program judgment section for judging whether or not the predetermined program mode selected by the program selection and transfer means is accepted by the digital signal module, and a result of judgment by the program judgment section, If it is determined that the predetermined program mode is accepted by the digital signal processing module, confirmation operation control is executed according to the content of the predetermined program mode, and as a result of the determination, the predetermined program mode is Received by the digital signal processing module When it is determined that the predetermined program mode is accepted, the operation confirmation control unit that outputs the determination result from the program determination unit, and the predetermined program mode when it is determined that the predetermined program mode is accepted by the program determination unit On the basis of the above contents, the operation check program control means for checking and checking the operation function of the digital processing module and outputting the check result is configured.

[0007]

The program determining unit of the present invention determines whether or not the predetermined program mode is transferred to the digital signal processing module, and as a result of the determination, it is determined that the predetermined program mode is accepted by the digital signal processing module. In this case, the operation confirmation control unit executes the operation confirmation control of the digital signal processing module according to the contents of the predetermined program mode, and the operation confirmation program control means executes the operation function of the digital signal processing module by the predetermined program. Confirmation inspection is performed based on the contents of the mode, and the inspection result is output.

If it is determined by the program determination unit that the predetermined program mode is not accepted by the digital signal processing unit, the operation confirmation control unit outputs the determination result from the program determination unit.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an inspection apparatus for module operation of a digital signal processing module (hereinafter referred to as "DSP module") of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the embodiment. In FIG. 1, the mode setting device 1 selects one of a plurality of operation confirmation programs for confirming the output of a power-on command and the operation function of the DSP module 6.
It has a function of selecting a predetermined program mode and transferring it to the MPU 3, and serves as a program selection transfer means.
When the mode setting device 1 outputs a power-on command to the MPU 3, the MPU 3 outputs this command to the constant voltage device 4.

When the constant voltage device 4 receives this command from the MPU 3, the constant voltage device 4 generates a constant voltage and applies the constant voltage to the DSP module 6. The constant voltage device 4 is adapted to be supplied with electric power by the stabilized power supply 5. By stabilizing the output power of this power source stabilization 5, D
A constant voltage is supplied to the SP module 6 to operate the DSP module 6.

The settings of the operation confirmation program for confirming the operation function of the DSP module 6 by the mode setting device 1 include "audio signal static characteristic measurement program", "white noise output program", and "memory IC internal function". One of the predetermined program modes of the "confirmation program" is set. The predetermined program mode set by the mode setting device 1 is MPU3.
To be transferred to.

Further, the MPU 3 includes a program judging section, an operation confirmation control section, and an operation confirmation program control means. Among these, the program determination unit determines whether or not the predetermined program mode selected by the mode setting device 1 and transferred to the MPU 3 is accepted by the DSP module 6.

When it is determined that the determination result by the program determination unit is accepted by the DSP module 6, the operation confirmation control unit controls the operation confirmation of the DSP module 6 according to the contents of the predetermined program mode. And a function of controlling the program determination unit of the MPU 3 to output the determination result to the external output device 2 when it is determined that the predetermined program mode is not accepted by the DSP module 6. have.

The operation confirmation program control means of the MPU 3 is configured to perform a confirmation inspection of the operation function of the DSP module 6 based on the contents of a predetermined program mode, and output the inspection result to the external output device 2. .

When the predetermined program mode selected by the mode setting device 1 is transferred to the DSP module 6, it is transferred from the MPU 3 to the DSP module 6 via the data communication signal line 7. At this time, the DSP module 6 reads a predetermined program mode. Whether or not it is accepted is determined by MPU3.
It is designed to be performed by the program determination unit.

In the above-mentioned predetermined program mode, that is, when the "audio signal static characteristic measurement program" of the operation confirmation program is set, the oscillator 8 causes the DS
The signal input to the P module 6 is transferred to the DSP module 6
The data is output to the measuring instrument 9 without any data conversion inside. In addition, among the operation confirmation programs,
When the “white noise output program” is set, white noise is generated inside the DSP module 6 and output to the measuring instrument 9. Further, when the "memory IC internal function confirmation program" is set, the DSPIC 12 and the RAM are stored inside the DSP module 6 as shown in FIG.
The function of the memory IC is confirmed between the terminals 13 and 14, and it is determined whether the predetermined program mode resulting from the communication signal line 7 is accepted or not accepted.
It outputs to U3, and MPU3 outputs the result to the external output device 2.

The switching of these three types of programs is performed by the mode setting device, and the result of the switching is the MPU3.
The data is transmitted from the data communication signal line 7 to the DSP module 6, and the program transmitted in the DSP module 6 is switched.

Next, the internal structure of the DSP module 6 will be described with reference to FIG. The output signal of the oscillator 8 shown in FIG. 1 is input to the input terminal T1, and the output signal of the oscillator 8 is input from the input terminal T1 through a low-pass filter (hereinafter referred to as LPF) 10 to perform analog / digital ( Hereinafter referred to as A / D) converter 1
1 and then converted to a digital signal and converted to DS
It is designed to be input to the PIC12.

The DSPIC 12 performs a predetermined signal processing, and the function of the memory IC is confirmed between the DSPIC 12 and the RAMs 13 and 14 which are the internal memories of the DSP module 6, and the RAMs 13 and 1 from the data communication signal line 7 are checked.
The result of the function confirmation of No. 4, that is, the pass / fail is output to the MPU 3 via the data communication signal line 7.

The outputs of the DSPIC 12 are digital / analog (hereinafter referred to as D / A) converter 1 respectively.
It is transferred to 5, 16 and is converted into an analog signal there.

The output of the D / A converter 15 is divided into two systems and is output to the output terminals T2 and T3 via the LPFs 17 and 18. Similarly, the output of the D / A converter 16 is divided into two systems and output to the output terminals T4 and T5 via the LPFs 19 and 20. These output terminals T2 to T5 are respectively connected to the input terminals of the measuring device 9 in FIG.

Next, the operation of the configuration of this embodiment will be described. FIG. 3 is an operation flowchart of the operation confirmation program of the DSP module 6. First, when the inspection device for this module operation is started and the initial setting process in which the program is transferred from the MPU 3 to the DSP module 6 is started (step S1). 4, the process proceeds to the process shown in the control flowchart of the MPU 3 shown in FIG. 4, the mode setting device 1 turns on the switch (step S21), the power setting command is output from the mode setting device 1 to the MPU 3, and the mode LED (light emitting diode). Is turned off (step S22), the check LED is also turned off (step S23), and the MPU3
The MPU 3 which has received this command outputs a power-on command to the constant voltage device 4.

As a result, the constant voltage device 4 is stabilized by the stabilizing power source 5.
The output voltage of is used as an input voltage to generate a constant voltage. This constant voltage supplies a constant voltage to the DSP module 6,
The SP module 6 becomes operable. In this state, from the mode setting device 1, "audio signal static characteristic measurement program" (predetermined program mode 1), "white noise output program" (predetermined program mode 2), "memory IC internal function confirmation program" (predetermined program mode 3) First, when the predetermined program mode 1 is set (step S24), the predetermined program mode 1 is transferred from the mode setting device 1 to the MPU 3 (step S25).

When this predetermined program mode 1 is transferred to the MPU 3, it is transferred from the MPU 3 to the DSP module 6 through the data communication signal line 7. The program determination unit in the MPU 3 determines whether or not the DSP module 6 has accepted the predetermined program mode 1 (step S26). As a result of this determination, if the DSP module 6 determines that the predetermined program mode 1 cannot be accepted,
The process returns to step S21. When the DSP module 6 determines that the predetermined program mode 1 can be accepted, the mode LED is turned on (step S2).
7).

When the "white noise output program", that is, the predetermined program mode 2 is selected by the mode setting device 1 instead of the predetermined program mode 1 in step S24 (step S28), the above step S2 is performed.
The predetermined program mode 2 is transferred from the mode setting device 1 to the MPU 3 in the same processing procedure as steps 5 to S27 (step S29).

When this predetermined program mode 2 is transferred to the MPU 3, it is transferred from the MPU 3 to the DSP module 6 through the data communication signal line 7. The program determination unit of the MPU 3 determines whether or not the predetermined program mode 2 is accepted by the DSP module 6 (step S
30). As a result of this determination, when the DSP module 6 determines that the predetermined program mode 2 cannot be accepted, the process returns to step S21. When the DSP module 6 determines that the predetermined program mode 2 can be accepted, the mode LED is turned on (step S31).

Further, when the "memory IC internal function confirmation program", that is, the predetermined program mode 3 is selected by the mode setting device 1 in step S28 (step S32), the predetermined program mode 1 is selected. The predetermined program mode 3 is transferred from the mode setting device 1 to the MPU 3 in the same manner as when selecting the predetermined program mode 2 (step S3).
3).

When this predetermined program mode 3 is transferred to the MPU 3, it is transferred from the MPU 3 to the DSP module 6 through the data communication signal line 7. The program determination unit determines whether the predetermined program mode 3 is accepted by the DSP module 6 (step S34).
If the result of this determination is that the DSP module 6 cannot accept the predetermined program mode 3, then step S2
Return to processing of 1. When the DSP module 6 determines that the predetermined program mode 3 can be accepted, the mode LED is turned on (step S35).

Next, the RAM 1 of the DSP module 6
The program determination unit determines whether or not the function confirmation checks 3 and 14 can be performed (step S36). If the determination result cannot be obtained, the process returns to step S21. The LED is turned on (step S37). After the initialization processing in step S1 of FIG. 3, the control processing of the MPU 3 as shown in FIG.

In FIG. 4, as a result of the determination in step S26, the predetermined program mode 1 is the DSP module 6
Is determined not to be accepted by the DSP module 6, the predetermined program mode 2 in step S30 is determined not to be accepted by the DSP module 6, and the predetermined program mode 3 in step S34 is determined by the DSP module 6. When it is determined that the DSP module 6 is not accepted, the operation confirmation control unit externally informs the program determination unit that the DSP module 6 has not accepted one of the predetermined program mode 1 to the predetermined program mode 3 by the external. The output device 2 is made to output.

When the predetermined program mode 1 to the predetermined program mode 3 are transferred to the DSP module 6 as described above, the DSP module 6 discriminates the predetermined program mode 1 to the predetermined program mode 3 from each other. In, for example, it is determined whether or not the flag "1" is set (step S2 in FIG. 3). If it is determined that the flag "1" is set as a result of this determination, it is determined to be the predetermined program mode 1 or the predetermined program mode 2 (step S).
3).

As a result of this judgment, the predetermined program mode 1
If it is determined that the MPU 3 is accepted by the DSP module 6, the predetermined program mode 1 (“audio signal static characteristic measurement program”) is transferred from the mode setting device 1 to the MPU 3 (step S4), and the operation confirmation control unit of this MPU 3 is also transmitted. Control of the operation confirmation according to the contents of the predetermined program mode 1 is executed (step S5),
Based on the contents of the predetermined program mode 1 of the DSP module 6 by the operation confirmation program control means 3 of FIG. 3, the processing routine shown in FIG.

In FIG. 5, the "audio signal static characteristic program" based on the contents of the predetermined program mode 1 is executed, and the output signal of the oscillator 8 is measured in the DSP module 6 without changing the data. The process of outputting to 9 is performed. That is, the operation control program control means of the MPU 3 sets CR and SR (step S41), clears the contents stored in the RAMs 13 and 14 (step S42), and sets the external D-RAM (not shown) to the initial address. After setting (step S43), a series of initial setting processing is performed.

Next, it is determined whether or not "airdy" (command name) is "1" by checking the presence or absence of the flag "1". If the flag "1" is set, the oscillator 8 inputs it to the input terminal T1. When it is determined that the signal (audio data) to be reproduced is synchronized (step S44), and when it is determined that this signal is synchronized, this input signal is stored in the external D-RAM (step S45). , This external D-
The RAM address is updated (step S46), and the data written in the external D-RAM is read with a delay of 100 ms (step S47).
After converting the digital signal into an analog signal by 5 and 16, respectively, the output of the D / A converter 15 is output from the output terminals T2 and T3 through the LPFs 17 and 18, and the output of the D / A converter 16 is output through the LPFs 19 and 20. It is taken out from T4 and T5 (step S48).

Next, a description will be given of the processing for checking the operating function of the DSP module 6 based on the contents of the predetermined program mode 2 by the operation checking program control means of the MPU 3. In this case, in the flowchart of FIG. 3, when it is determined that the predetermined program mode 2 is accepted by the DSP module 6 as a result of the determination in step S3, the predetermined program mode 2, that is, the “white noise output program” is set to the mode. The data is transferred from the setting device 1 to the MPU 3, transferred from the MPU 3 to the DSP module 6 via the data communication signal line 7 (step S6), and the operation confirmation control of the DSP module 6 according to the contents of the predetermined program mode 2 is executed. (Step S7), in order to execute the confirmation inspection of the operation function based on the contents of the predetermined program mode 2 of the DSP module 6 by the operation confirmation program control means of the MPU 3,
The routine for the test tone output processing shown in FIG. 6 is entered.

In FIG. 6, the "white noise output program" is executed on the basis of the contents of the predetermined program mode 2, and D inside the DSP module 6 is executed.
White noise is generated by the SPIC 12 and output to the measuring device 9. That is, the operation control program control means of the MPU 3 sets CR and SR (step S5).
1), the contents stored in the RAMs 13 and 14 are cleared (step S52), the TMP and C-RAM are initialized (step S53), and a series of initialization processing is performed.

Next, it is judged whether or not "airdy" (command name) is "1" by checking the presence or absence of the flag "1". If the flag "1" is set (step S54), the M-sequence random number is determined. Generate and output random number data (step S5)
5). This random number data is written in the RAMs 13 and 14 (step S56), and then the write addresses of the RAMs 13 and 14 are updated (step S57), and the RAM 1
The random number data written in 3 and 14 are converted into analog signals by the D / A converters 15 and 16, respectively, and the LPF is converted.
White noise is output from output terminals T2 and T3, and T4 and T5 via 17 and 18 and LPFs 19 and 20, respectively (step S58).

Next, a description will be given of the processing for checking the operation function of the DSP module 6 by the operation checking program control means of the MPU 3 based on the contents of the predetermined program mode 3. In this case, in the flowchart of FIG.
If it is determined that the flag “1” is not set as a result of the determination in 2, the D is determined based on the content of the “memory IC internal function confirmation program”, that is, the predetermined program mode 3.
Execution processing of the confirmation inspection of the operation function of the SP module 6 is started, and the RAMs 13 and 14 are initialized (step S
8).

In the execution process of this "memory IC function confirmation program", as shown in FIG.
Since the case where two RAMs 13 and 14 are used as the memory IC is shown, it is necessary to individually check the operation functions of the RAMs 13 and 14.

Therefore, in steps S8, the RAMs 13 and 14 are
When the initialization is performed, first, the process of checking the operation function of the RAM 13 is started (step S9), and a predetermined program mode 3, that is, the "memory IC function check 1 program" is transferred from the mode setting device 1 to the MPU 3. MP
DSP module 6 from U3 via data communication signal line 7
Transferred to this "memory IC function confirmation 1 program"
The control for confirming the operation of the operation function of the RAM 13 is executed according to the contents of (step S10), and when the confirmation is completed (step S11), the predetermined program mode 3 of the DSP module 6 by the program control means for operation confirmation of the MPU 3 ( Based on the content of the "memory IC function confirmation 1 program"), the processing routine shown in FIG. 7 for executing the confirmation inspection of the operation function of the memory IC is entered.

In FIG. 7, CR and SR settings are made by the operation confirmation program control means of the MPU 3 based on the contents of the "memory IC function confirmation 1 program" (step S61), and the contents stored in the RAMs 13 and 14 are stored. Clear (step S62), clear the external D-RAM (step S63), write "5555H" in RAM13,
The reading is checked (step S64), and this "555
If the result of the “5H” data writing / reading check is successful (step S65), “A” in the RAM 13 is read.
"AAAH" data writing and reading check are performed (step S66).

Next, it is judged whether or not the result of this "AAAAAH" data writing / reading check is acceptable (step S
67) As a result of the determination, if the result is acceptable, address data writing / reading of the RAM 13 is checked (step S68). As a result of this check, if it is determined to be pass (step S69), the end output (PT1 = L), O
The K output (PT1 = L) is output from the operation control program control means of the MPU 3 to the external output device 2 (step S).
70).

Further, in steps S65, S67,
If the result of each determination in step S69 is that the check fails, the operation confirmation program control means of the MPU 3 outputs an end output (PT1 = L) and an NG output (PT1 = H) to the external output device 2 ( Step S71).

In this way, the pass / fail judgment is made by confirming the operation function of the RAM 13 (step S1 in FIG. 3).
2) In the case of failure, the failure is output as described in step S71 of FIG. 7 (step S18). Also,
As a result of the pass / fail determination in step S12 of FIG. 3, when it is determined as pass (that is, when the pass output is output in step S70 of FIG. 7), the contents of the “memory IC function confirmation 2 program” of the RAM 14 are changed. Based on this RAM1
The process of checking the operation function of step 4 is started (step S1).
3), a predetermined program mode 3, that is, "memory IC function confirmation 2 program" is transmitted from the mode setting device 1 to M
The data is transferred to the PU 3 and then transferred from the MPU 3 to the DSP module 6 via the data communication signal line 7.
The control for confirming the operation function of the RAM 14 according to the contents of the "function confirmation 2 program" is executed (step S14),
When the confirmation is completed (step S15), the predetermined program mode 3 ("memory IC function confirmation 2" of the DSP module 6 by the operation confirmation program control means of the MPU 3 is performed.
Based on the contents of "program"), the processing routine shown in FIG.

The processing routine of FIG. 7 has already been described based on the contents of the "memory IC function confirmation 1 program".
As for the processing of “program”, in the description of the processing procedure of “memory IC function confirmation 1 program”, “RAM 13” is replaced with “R”.
AM14 ”is simply read and description thereof is omitted.

In this way, the operation function of the RAM 14 is confirmed and the pass / fail judgment is made (step S1 in FIG. 3).
6) In the case of failure, the failure is output as described in step S71 of FIG. 7 (step S18). Also,
As a result of the pass / fail determination in step S16 of FIG. 3, when it is determined as pass (that is, when the pass output in step S70 of FIG. 7 is output), the operation check program control means 3c causes the external output device 2 to operate. To pass the output (step S17).

[0047]

As described above, according to the present invention, the DS
This operation confirmation program is set in the MPU having the operation confirmation program of the P module by an external mode setting device, and the MPU is set to the DSP module to be measured.
The operation check program is transferred to the device and the operation of devices such as DSP module board wiring, component mismounting, solder failure, DSPIC, and memory IC is checked by the transferred operation check program. It is no longer necessary to have a dedicated program for operation confirmation. Along with this, the memory can be saved, and the cost can be reduced.

Further, the inspection time can be shortened as compared with the conventional method using a hardware continuity tester, and not only is it possible to support a high-density-designed board, but also the function confirmation of a single component after component mounting can be performed. It will be possible.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a module operation inspection device of the present invention.

FIG. 2 is a block diagram showing an internal configuration of a DSP module in the embodiment.

FIG. 3 is a flowchart of a DSP module operation confirmation program for explaining the operation of the above embodiment.

FIG. 4 is a flowchart for explaining control of the MPU in the above-mentioned embodiment.

FIG. 5 is a flowchart showing an execution processing procedure of an audio data non-conversion output program applied to the embodiment.

FIG. 6 is a flowchart showing an execution processing procedure of a white noise output program applied to the embodiment.

FIG. 7 is a flowchart showing an execution processing procedure of a memory IC function confirmation program applied to the embodiment.

[Explanation of symbols]

 1 Mode Setting Device 2 External Output Device 3 MPU 4 Constant Voltage Device 5 Stabilized Power Supply 6 DSP Module 7 Data Communication Signal Line 8 Oscillator 12 DSPIC 13 RAM 14 RAM

Claims (1)

[Claims] 1. An inspection device for a digital signal processing module to be measured, which performs a predetermined operation when a predetermined measurement signal is input and outputs the operation signal, for confirming an operation function of the digital signal processing module. Program selection and transfer means for selecting a predetermined program mode in the program and transferring it to the digital signal processing module, and whether or not the predetermined program mode selected by the program selection and transfer means is accepted by the digital signal module. A program determining section for determining, and as a result of the determination by the program determining section, if it is determined that the predetermined program mode is accepted by the digital signal processing module, confirmation operation control according to the content of the predetermined program mode. Run the
In addition, as a result of the determination, if it is determined that the predetermined program mode is not accepted by the digital signal processing module, the operation confirmation control unit that outputs the determination result from the program determination unit, and the program determination unit When it is determined that the predetermined program mode is accepted, based on the contents of the predetermined program mode, an operation confirmation program control means for performing a confirmation inspection of the operation function of the digital processing module and outputting the inspection result. A module operation inspection device equipped.