Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
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
Icon for Honored Contributor rankHonored Contributor
15 years ago

I'm dealing with the same issue. Cyclone III stuck in POR.

All rails are present that should be present. Rail timing/sequencing is not an issue per the handbook. It just stays in Reset until all required rails are in the required ranges.

My nSTATUS line is pulled up with a 10k to 3.3V, but the chip side of the resistor is measuring to be ground.

I've looked over my design for two days since receiving my new boards. I've checked my pinout in the schematic, checked my pinout in the layout, checked for proper orientation of the chip, checked the part number of the installed chip, checked all voltage rails, etc.

I can't wait to figure this one out.

Rick