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Alanjiang
Adept I

Genoa SP3 boundary scan test

Hi,

When boundary scanning with SP3, EPYC Genoa CPU, IDCODE can response correctly with 0000 0000 0000 0010 1011 0000 0000 0011, aka 0x0002b003, but the response of SAMPLE/PRELOAD command is always all low, this is wrong.

Is the PRELOAD code wrong?

"SAMPLE (00011011),"& -- 8'h1b
"PRELOAD (00011011),"& -- 8'h1b

Is a SVF or SIR to be executed to access boundary scan registers first?

I found 2 special instructions from BSDL file.

"SELECTDIE (00000011),"& -- 8'h03
"PINTEST (00011000),"& -- 8'h18

Do we have to execute the 2 SIR to access boundary scan register?

 

 

Thank you verify much.

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5 Replies
Alanjiang
Adept I

corrected the CPU is SP5 series.

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Try posting at AMD SERVER GURUS which deals with everything to do with AMD EPYC Processors from here: https://community.amd.com/t5/server-gurus/ct-p/amd-server-gurus

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got it, thanks.

the message was left you forum and we didn't get a response. Thank you very much.

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For your information only here is AMD Tech Documentation that might be helpful concerning the EPYC processors: https://www.amd.com/en/support/tech-docs?keyword=epyc

Screenshot 2023-03-08 204116.png

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thanks for you reply. you message is helpful to solve the problem.

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