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Altera_Forum's avatar
Altera_Forum
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17 years ago

Cyclone 3 problem: Holding nConfig low

I am having a really weird problem with a really simple board. Using an EP3C25E144C8N, active serial configuration mode with an EPCS16, MSEL[2:0] = 010. I can successfully erase and program the con...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

I have a simple answer to your verbose description: nConfig is an input pin according to the Cyclone III device handbook (unconditionally, as with all other FPGA). If you observe it pulled low, something is wrong with your hardware.