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kadafato
Observer
Observer
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Registered: ‎09-24-2018

Using PJTAG on ZCU102 and Enabling DAP

Hi,

I'm using a ZCU102 board.

I would use PJTAG pin to connect a debugger. Into chapter 39 of UG108 v1.9 Zynq UltraScale+ Device TRM I read that for using PJTAG it's necessary that

"Arm DAP is not on the JTAG chain" (pag 1138)  but on PJTAG interface chain (pag 1144).

How to do this (connecting DAP on PJTAG)?

At pag 1136 manual says to do configuration using JTAG_DAP_CFG register, but seeing it's description into UG1087 Register reference I don't know how.

I only found jtag_chain_status for status.

Thank a lot

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abommera
Xilinx Employee
Xilinx Employee
617 Views
Registered: ‎10-12-2018

Hi @kadafato,

Since the ARM DAP and the PL TAP are part of the same JTAG chain, it is possible to
connect to the ARM DAP using the PL TAP port.

Could you please check the table 39-2 & 39-3 for JTAG chain configuration registers?

Please use the below command to read the JTAG_DAP_CFG status.

xsdb% mrd 0xFFCA003C

Thanks & Regards

Anil B

Thanks & Regards
Anil B
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