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Altera_Forum
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15 years ago

Trouble programming Cyclone III with USB Blaster (Can't recognize Silicon ID)

I was able to Program/Verify my FPGA many times until my PC crashed this morning while programming. Since then I'm unable to successfully program, erase or verify. I get the following mes...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Unstable operation of the JTAG interface is usually caused by signal quality problems, particularly related to TCK. The problem even existed with some development kits and should be assumed as a likely reason with your own hardware design.