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patmcn
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Participant
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Registered: ‎06-27-2019

JTAG TDO no transitions

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Hi, I have a custom board with a zcu2eg on board.  My PS Mode pins are all at 0 and I'm trying to get JTAG going using the platform USB cable II red JTAG pod to my board.  I have pull ups on each line, TDI, TDO, TCLK, TMS, and PS_SRST_B and I can see TCLK, TDI, and TMS clearly coming from the pod into the board, but I'm getting no response out of the mpsoc on the TDO line.  I have a series resistor coming out of the pin so I probed only seeing that it's pulled high with no transitions at all.

Booting into JTAG mode, INIT_B, PS_DONE, PS_ERROR_OUT, and PS_ERROR_STATUS are all not asserted.

Do I have any other options for measuring what could be causing my chip to not respond to JTAG?

Thanks

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patmcn
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Participant
416 Views
Registered: ‎06-27-2019

Turns out I had pins swapped on the custom PCB.

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patmcn
Participant
Participant
417 Views
Registered: ‎06-27-2019

Turns out I had pins swapped on the custom PCB.

View solution in original post