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Altera_Forum
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18 years ago

Cyclone III AS Configuration

Hello, I am having some problems getting AS configuration working with my Cyclone III FPGA. I am using an EPCS16 for the configuration chip and the C3 is a EP3C25F324C8N on a custom board. Th...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

I agree that the signals look pretty bad, but I don't know if it's a measurement problem with my oscilloscope. I have 9pF probes and when I measure signals from the JTAG header that programs the FPGA directly they look ok. I guess my question is, do you guys know what might be causing these bad signals? Has anyone had personal experience with the setup I described (JTAG and AS)? If so, are there issues in layout or component selection I should be aware of?

Thanks,

Andrew