Method and equipment for detecting single plate by JTAG
A technology of testing equipment and testing methods, which is applied in the direction of detecting faulty computer hardware, etc., can solve the problems of high cost, achieve the effects of avoiding losses, improving the correct rate of diagnosis, and reducing the difficulty of operation
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[0012] figure 1 A schematic view showing the test equipment according to the present invention.
[0013] According to the present invention, in order to test the single board 2, a chip 201 supporting JTAG function (hereinafter referred to as JTAG chip) is required on the single board 2. The JTAG chip 201 includes a TAP (Test Access Port) controller 220, and the TAP controls The TAP control signals provided by the device 220 include:
[0014] TCK: Test Clock (input)
[0015] TDI: Test Data In test data input (input)
[0016] TMS: Test Mode Select test mode selection (input)
[0017] TDO: Test Data Out test data output (output)
[0018] TRST: Test Reset (input) (optional).
[0019] The above-mentioned TAP control signal is derived from the TAP controller 220 located on the JTAG chip for the present invention to test the single board under test.
[0020] Such as figure 1 As shown, in order to test the single board 2 with the JTAG chip 201, the test device 1 of the present inventio...
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