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Altera_Forum
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15 years ago

Help - nStatus won't release, EP3C5 custom board

I'm having trouble programming a Cyclone III on our custom board via JTAG. The nstatus pin won't release yet I can't find anything wrong with the voltages on the board. Could something else keep devi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I don't see anything wrong, except that you use 3.3V without protection for the JTAG interface, which isn't recommended and could destroy the FPGA.

Did you check the quality of the JTAG signals with an oscilloscope?