TWI759380B - Pin of connector slot of circuit board conduction detection system and method thereof - Google Patents

Abstract

A pin of connector slot of circuit board conduction detection system and a method thereof are provided. A connector slot detection circuit board is plug on correspond a connector slot of detected circuit board and different kinds of connector slot of connector slot detection circuit boards are concatenated. A JTAG chip is set to boundary scan mode by a TAP controller to read a detection signal of detection pin of connector slot connector through ADC, microcontroller, or switch to detect conduction for pin of connector slot. Therefore, the improve efficiency of detecting connector slot of circuit board may be achieved.

Description

Circuit board connector slot pin conduction detection system and method

A detection system and a method thereof, in particular, a continuity detection system and a method for simultaneously providing serial connection of different types of connector slots.

For the continuity detection of the slot on the circuit board, currently, the test circuit board corresponding to the connector slot is inserted into the corresponding connector slot, for example: the test circuit board with DIMM inserted in the DIMM slot, the PCI- A test circuit board for testing PCI-E is inserted into the E slot, etc., and the continuity detection of the slot on the circuit board is performed through the boundary scan technology.

However, for different connector slots, the corresponding test circuit boards are somewhat different in design, that is, during the detection process through boundary scan, there will be different detection methods. Generally, the same type of connection Boundary scan test is performed after the device slots are connected in series. However, when the test ports provided by the TAP controller are limited, there will still be insufficient test ports provided by the TAP controller, which not only affects the test efficiency, but also affects the test efficiency. will affect the test coverage.

To sum up, it can be seen that in the prior art, there has been a long-standing problem of insufficient test efficiency and coverage for connector socket testing on existing circuit boards. Therefore, it is necessary to propose improved technical means to solve this problem.

In view of the problem of insufficient test efficiency and coverage in the prior art of the existing connector socket test, the present invention discloses a connector socket pin continuity detection system and method for a circuit board, wherein:

The connector socket pin continuity detection system for a circuit board disclosed in the present invention includes: a circuit board to be tested with at least one connector socket, at least one connector socket detection circuit board, and a test access port (test access port). access port, TAP) controller.

The connector slot detection circuit board has a connector slot connector, an input joint test action group (JTAG) connector, an output JTAG connector, a JTAG chip, and at least an analog to digital converter (Analog to digital converter). converter, ADC), microprocessor (MCU) or switch (switch), ADC or microprocessor is respectively electrically connected with the connector socket connector and JTAG chip, or the switch is respectively connected with the connector The socket connector, the JTAG chip and the input JTAG connector are electrically connected, and the input JTAG connector is electrically connected with the JTAG chip and the output JTAG connector respectively.

The TAP controller is electrically connected to the input JTAG connector of one of the connector slot detection circuit boards.

The output JTAG connector is electrically connected to the input JTAG connector of one of the other connector socket detection circuit boards; and the TAP controller controls the JTAG chip to set the boundary scan working mode and sends corresponding control signals To the corresponding JTAG chip to read the detection signal of the detection pin of the corresponding connector socket by one of the ADC, microprocessor or switch, the TAP controller uses the detection signal provided by the JTAG chip to correspond Continuity detection of connector socket pins.

The method for detecting the continuity of the connector socket pins of the circuit board disclosed in the present invention includes the following steps:

First, provide a circuit board to be tested with at least one connector slot; then, provide a connector with a connector slot, an input joint test action group (JTAG) connector, an output JTAG connector, a JTAG connector A chip and at least one connector slot of at least one of an analog to digital converter (Analog to digital converter, ADC), a microprocessor (microcontroller, MCU), or a switch (switch) detect the circuit board, ADC or microprocessor The connector is respectively electrically connected with the connector socket connector and the JTAG chip, or the switch is electrically connected with the connector socket connector, the JTAG chip and the input JTAG connector respectively, and the input JTAG connector is respectively connected with the JTAG chip and the output JTAG The device is electrically connected; then, a test access port (TAP) controller is provided, and the TAP controller is electrically connected to the input JTAG connector of one of the connector socket detection circuit boards; then, the output The JTAG connector is electrically connected to the input JTAG connector of one of the other connector socket detection circuit boards; finally, the TAP controller controls the JTAG chip to set the boundary scan working mode, and sends the corresponding control signal to the corresponding The JTAG chip is used to read the detection signal of the detection pin of the corresponding connector socket connector by one of ADC, microprocessor or switch, and the TAP controller uses the detection signal provided by the JTAG chip to carry out the corresponding connector. Continuity detection of socket pins.

The system and method disclosed in the present invention are as above, and the difference between the system and the prior art is that a corresponding connector slot detection circuit board is inserted into the connector slot of the circuit board to be detected, and different types of connector sockets are connected in series at the same time. The connector slot detection circuit board of the slot, controls the JTAG chip to set the boundary scan through the TAP controller, and reads the detection signal corresponding to the detection pin of the connector slot by one of the ADC, the microprocessor or the switch. , The TAP controller conducts the conduction detection of the corresponding connector socket pins through the detection signal provided by the JTAG chip.

Through the above technical means, the present invention can achieve the technical effect of improving the testing efficiency and coverage of the connector socket on the circuit board.

The embodiments of the present invention will be described in detail below with the drawings and examples, so as to fully understand and implement the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects.

Hereinafter, an embodiment will be used to illustrate the operation system and method of the embodiment of the present invention, and please refer to "Fig. 1", "Fig. 2", and "Fig. 3A" to "Fig. 3C" at the same time, " Figure 1" shows the system block diagram of the connector socket pin continuity detection system of the circuit board of the present invention; "Figure 2" shows the method of the connector socket pin continuity detection method of the circuit board of the present invention Flow charts; "FIG. 3A" to "FIG. 3C" are block diagrams of the connector socket detection circuit board for the connector socket pin conduction detection of the circuit board of the present invention.

The connector socket pin conduction detection system for a circuit board disclosed in the present invention includes: a circuit board to be tested 10 having at least one connector socket 11 (step 101 ), and at least one connector socket detection circuit board 20 and a test access port (TAP) controller 30, the connector slot 11 includes a dual in-line memory module (DIMM) slot, a fast peripheral interconnect standard The (peripheral component interconnect express, PCI-E) slot and the universal serial bus (universal serial bus, USB) slot, etc., are only illustrative here, and are not intended to limit the scope of application of the present invention.

As shown in "FIG. 3A", the connector socket connector 21 of the connector socket detection circuit board 20 is a DIMM connector, and the connector socket detection circuit board 20 has a connector socket connector 21, an input joint test A joint test action group (JTAG) connector 22 , an output JTAG connector 23 , a JTAG chip 24 , and a microprocessor (MCU) 25 (step 102 ).

The connector socket detection circuit board 20 is inserted into the connector socket 11 of the circuit board 10 to be tested through the connector socket connector 21 , and the microprocessor 25 is respectively connected to the connector socket connector 21 and the JTAG chip 24 is electrically connected, and the input JTAG connector 22 is electrically connected to the JTAG chip 24 and the output JTAG connector 23 respectively (step 102 ).

As shown in FIG. 3B, the connector slot connector 21 of the connector slot detection circuit board 20 is a PCI-E connector, and the connector slot detection circuit board 20 has a connector slot connector 21, an input The JTAG connector 22 , the output JTAG connector 23 , the JTAG chip 24 , and at least an analog to digital converter (ADC) 26 (step 102 ).

The connector socket detection circuit board 20 is inserted into the connector socket 11 of the circuit board 10 to be tested through the connector socket connector 21 , and the ADC26 is electrically connected to the connector socket connector 21 and the JTAG chip 24 respectively. To connect, the input JTAG connector 22 is electrically connected to the JTAG chip 24 and the output JTAG connector 23 respectively (step 102 ).

As shown in FIG. 3C, the connector socket connector 21 of the connector socket detection circuit board 20 is a USB connector, and the connector socket detection circuit board 20 has a connector socket connector 21, an input JTAG connection 22, output JTAG connector 23, JTAG die 24, and switch 27 (step 102).

The connector socket detection circuit board 20 is inserted into the connector socket 11 of the circuit board 10 to be tested through the connector socket connector 21 , and the switch 27 is respectively connected with the connector socket connector 21 , the JTAG chip 24 and the The input JTAG connector 22 is electrically connected, and the input JTAG connector 22 is electrically connected to the JTAG chip 24 and the output JTAG connector 23 respectively (step 102 ).

The TAP controller 30 is electrically connected to the input JTAG connector 22 of one of the connector socket detection circuit boards 20 (step 103 ), and the output JTAG connector 23 of the connector socket detection circuit board 20 is connected to the other connectors The input JTAG connector 22 of one of the socket detection circuit boards 20 is electrically connected (step 104).

The TAP controller 30 controls the JTAG chip 24 in the connector socket detection circuit board 20 to set the boundary scan operation mode (step 105 ), and assumes that the connector socket of the connector socket detection circuit board 20 is under test When the connector 21 is a PCI-E connector, the JTAG chip 24 of the connector slot detection circuit board 20 is further set to the EXTEST mode, and the remaining untested connector slots detect the JTAG chip 24 in the circuit board 20 will be further set to BYPASS mode.

After the above setting, the TAP controller 30 sends the corresponding control signal to the corresponding JTAG chip 24 to read the detection pin ( The detection pins are, for example, power pins, ground pins, input and output pins, and differential input and output pins, etc., which are only illustrative and are not intended to limit the scope of application of the present invention). The TAP controller 30 uses the detection signal provided by the JTAG chip 24 to perform the conduction detection of the pin corresponding to the connector socket 11 (step 105 ).

When searching the schematic diagram of the motherboard and determining the test target pins, all the interfaces on the entire scan chain are processed uniformly; when collecting parameters and testing, they are still classified by type; when testing, the management of the scan chain that does not participate in the test is processed. With the use of boundary scan BYPASS instruction. In this way, it can be ensured that all test fixtures mixed in one scan chain are tested with high coverage rate, and test time is saved, and the test efficiency is the same as that of splitting into multi-chain tests.

To sum up, it can be seen that the difference between the present invention and the prior art lies in that a corresponding connector slot detection circuit board is inserted into the connector slot of the circuit board to be detected, and the connectors of different types of connector slots are connected in series at the same time. The connector socket detection circuit board controls the JTAG chip to set the boundary scan through the TAP controller to read the detection signal corresponding to the detection pin of the connector socket by one of the ADC, the microprocessor or the switch, TAP The controller uses the detection signal provided by the JTAG chip to perform the conduction detection of the corresponding connector socket pins.

This technical means can solve the problem of insufficient test efficiency and coverage in the prior art for connector socket testing on the existing circuit board, thereby achieving a technology for improving the testing efficiency and coverage of the connector socket on the circuit board. effect.

Although the embodiments disclosed in the present invention are as above, the above-mentioned contents are not used to directly limit the scope of the patent protection of the present invention. Anyone with ordinary knowledge in the technical field to which the present invention pertains can make some changes in the form and details of the implementation without departing from the spirit and scope of the present invention. The scope of patent protection of the present invention shall still be defined by the appended patent application scope.

10‧‧‧Circuit board to be tested 11‧‧‧Connector socket 20‧‧‧Connector socket detection circuit board 21‧‧‧Connector socket Connector 22‧‧‧Input JTAG connector 23‧‧‧Output JTAG Connector 24‧‧‧JTAG Chip 25‧‧‧Microprocessor 26‧‧‧ADC27‧‧‧Switch 30‧‧‧TAP Controller Step 101‧‧‧Provide a circuit board to be tested with at least one connector socket Step 102‧‧‧Provide at least one connector slot detection circuit board having a connector slot connector, an input JTAG connector, an output JTAG connector, a JTAG chip, and at least one of an ADC, a microprocessor, or a switch , the ADC or the microprocessor is respectively electrically connected with the connector socket connector and the JTAG chip, or the switch is respectively electrically connected with the connector socket connector, the JTAG chip and the input JTAG connector, and the input JTAG connector is respectively connected with The JTAG chip and the output JTAG connector are electrically connected. Step 103‧‧‧Provide a TAP controller, and the TAP controller is electrically connected to the input JTAG connector of one of the connector socket detection circuit boards. Step 104‧‧‧Output JTAG connection The connector is electrically connected to the input JTAG connector of one of the other connector socket detection circuit boards. Step 105. The TAP controller controls the JTAG chip to set the boundary scan working mode, and sends the corresponding control signal to the corresponding JTAG chip to The detection signal of the detection pin of the corresponding connector socket is read by one of the ADC, microprocessor or switch, and the TAP controller uses the detection signal provided by the JTAG chip to correspond to the socket pin of the connector. Continuity detection of

FIG. 1 is a system block diagram of the connector socket pin continuity detection system of the circuit board of the present invention. FIG. 2 is a flow chart of the method for detecting the continuity of the connector socket pins of the circuit board according to the present invention. FIG. 3A to FIG. 3C are block diagrams of the connector socket detection circuit board for detecting the continuity of the connector socket pins of the circuit board of the present invention.

10‧‧‧Circuit board to be tested

11‧‧‧Connector slot

20‧‧‧Connector socket detection circuit board

21‧‧‧Connector Slot Connector

22‧‧‧Input JTAG connector

23‧‧‧Output JTAG connector

30‧‧‧TAP Controller

Claims (10)

A connector slot pin conduction detection system for a circuit board, comprising: a circuit board to be detected, the detection circuit board has at least one connector slot; at least one connector slot detection circuit board has a connector socket connector, an input joint test action group (JTAG) connector, an output JTAG connector, a JTAG chip, and at least an analog to digital converter (ADC), a micro A processor (microcontroller, MCU) or one of a switch (switch), the ADC or the microprocessor is respectively electrically connected to the connector socket connector and the JTAG chip or the The switch is respectively electrically connected with the connector socket connector, the JTAG chip and the input JTAG connector, and the input JTAG connector is respectively electrically connected with the JTAG chip and the output JTAG connector connection; a test access port (TAP) controller, the TAP controller is electrically connected to the input JTAG connector of one of the connector socket detection circuit boards; wherein, the The output JTAG connector is electrically connected to the input JTAG connector of one of the other connector socket detection circuit boards; and the TAP controller controls the JTAG chip to set a boundary scan working mode, And send the corresponding control signal to the corresponding JTAG chip to read the detection signal corresponding to the detection pin of the connector socket by the ADC, the microprocessor or the switch. The TAP controller performs conduction detection corresponding to the pin position of the connector socket through the detection signal provided by the JTAG chip. The connector socket pin continuity detection system for a circuit board as claimed in claim 1, wherein the connector socket includes a dual in-line memory module (DIMM) slot, peripheral component interconnect express (PCI-E) slot, and universal serial bus (USB) slot. The connector slot pin connection detection system of the circuit board according to the claim 1, wherein the connector slot connector comprises a DIMM connector, a PCI-E connector and a USB connector. The connector socket pin continuity detection system for a circuit board as claimed in claim 1, wherein the detection pins of the connector socket connector include power pins, ground pins, input and output pins, and Differential input and output pins. The connector socket pin continuity detection system of the circuit board according to the claim 1 of the patent application scope, wherein when the connector socket detection circuit board is being tested, the JTAG chip is further set to the EXTEST mode, so When the connector socket detection circuit board is not tested, the JTAG chip is further set to the BYPASS mode. A connector slot pin conduction detection method for a circuit board, comprising: providing a circuit board to be tested having at least one connector slot; providing a connector slot connector and an input joint test work group ( joint test action group, JTAG) connector, an output JTAG connector, a JTAG chip and at least an analog to digital converter (Analog to digital converter, ADC), a microprocessor (microcontroller, MCU) or a switch (switch) ) one of the at least one connector socket detection circuit board, the ADC or the microprocessor is respectively electrically connected with the connector socket connector and the JTAG chip or the switch is respectively connected with the connector socket connector, the JTAG chip and the input JTAG connector are electrically connected, and the input JTAG connector is electrically connected with the JTAG chip and the output JTAG connector respectively; providing a test access port (TAP) controller, the TAP controller is electrically connected to the input JTAG connector of one of the connector socket detection circuit boards; wherein the output JTAG The connector is electrically connected to the input JTAG connector of one of the other connector socket detection circuit boards; and the TAP controller controls the JTAG chip to set a boundary scan working mode, and sends The corresponding control signal is sent to the corresponding JTAG chip to read the detection signal corresponding to the detection pin of the connector socket by one of the ADC, the microprocessor or the switch, the TAP The controller performs conduction detection corresponding to the pin position of the connector socket through the detection signal provided by the JTAG chip. The method for detecting pin continuity of a connector socket of a circuit board as claimed in claim 6, wherein the connector socket includes a dual in-line memory module (DIMM) slot, peripheral component interconnect express (PCI-E) slot, and universal serial bus (USB) slot. The method for detecting pin continuity of a connector slot of a circuit board according to the sixth claim, wherein the connector slot connector includes a DIMM connector, a PCI-E connector and a USB connector. The method for detecting the continuity of the connector socket pins of the circuit board according to the claim 6 of the patent application scope, wherein the detection pins of the connector socket connector include power pins, ground pins, input and output pins, and Differential input and output pins. The method for detecting the continuity of the connector socket pins of the circuit board according to the claim 6, wherein when the connector socket detection circuit board is being tested, the JTAG chip is further set to the EXTEST mode, so When the connector socket detection circuit board is not tested, the JTAG chip is further set to the BYPASS mode.

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