10-22-2020 12:26 PM
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?