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Altera_Forum's avatar
Altera_Forum
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8 years ago

Read CHIP ID from JTAG

Is there a JTAG IR code that reads back the unique chip ID? I'm hoping to read the chip ID back with a code like this: device_ir_shift -ir_value <CHIP-ID-IR> -no_captured_ir_value device_dr_s...
Altera_Forum's avatar
Altera_Forum
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8 years ago

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So this is something only a few of the newer devices support: https://www.altera.com/en_us/pdfs/literature/ug/altchipid.pdf

There is a note that the ID is accessible thru JTAG for the Arria 10 and Cyclone 10 GX, but it appears you still need to instantiate the IP block.

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That note is a bit vague, but I believe it means you cannot have a pending master transaction over JTAG while CHIP ID is being read. Which leads me to believe that CHIPID IP, underneath, is actually using JTAG to retrieve the unique 64-bit number. So I believe there must be a way to read the number from JTAG directly. Unless it's deliberately closed off.

You are correct however, CHIPID is not available for all devices.

cheers,