Distinguishing 5CGXFC5C6F23 and 5CGTFD5C5F23 via JTAG

Question

I've seen that these seem to be pin compatible so I could use them on the same board for a cost/performance trade-off.

Obviously I want different bitstreams here, and ideally a check that I'm using the right one for the board in question. According to the BSDL files, both use the same IDCODE, so my expectation would be that the check embedded in the SVF would succeed.

Is there a way to find out what IC I'm talking to, or do I have to add an extra shift register to read out a jumper?

yuanli_s_intel · Answer

Hi Simon,You may consider this CHIP ID IP Core, it may yield different chip id for device identification.https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/ug/archives/altchipid-18-0.pdfRegards,Bruce

simonrichter · Answer

Hi,

That would be at runtime though -- what I'd need is a safety check during programming so I don't write a bitstream for a GT device to a GX device -- presumably that would be unsafe.

Simon

yuanli_s_intel · Answer

Yea, IDCODE is the only thing you can check before the device is in user mode.

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Distinguishing 5CGXFC5C6F23 and 5CGTFD5C5F23 via JTAG

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