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Altera_Forum's avatar
Altera_Forum
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15 years ago

Cyclone III stuck at POR?

Hi, I have problems to get a custom board work, the FPGA seems to be stuck in POR. It's a PCIe card with a EP3C10F256C7N. I attached an excerpt of the schematic to this post. I have 10 pro...
Altera_Forum's avatar
Altera_Forum
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15 years ago

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There isn't a JTAG reset pin, so you should always be able to access the JTAG chain.

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At least C III, but I guess other Altera FPGAs too, are actually blocking JTAG access when a reset condition exists, e.g. one of the monitored supply voltages is below it's POR threshold.