Can JTAG enable the SPNIDEN or SPIDEN signal in Juno board?

Hi all,

I found that the SPNIDEN and SPIDEN signal on the Juno board can be driven by the internal driver (SSC_DBGCFG_STAT register) or the debug authentication register in SCC. However, i cannot find the debug authentication register in SCC described in the board.txt, and also failed to get some information from the manual. I am interested in this two signals and try to understand how the signal works. Currently, i have two questions.

1. How can i modify the debug authentication register in the SCC?

2. If i disabled the SPNIDEN or SPIDEN signal by the SSC_DBGCFG_CLR or the SCC, is it possible for external debuggers like DS-5 and DStream to enable it again?

Thanks for any help and discussion!

Best Regards,

Zhenyu

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