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Altera_Forum
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16 years ago

Bad Pins

I am a rookie. I am working on my fourth MAX II design. I am using Quartus II Version 9 SP2. The problem I am having is that several pins on EPM1270 do not work. For example. I have four test...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

At this point I am humbled but mostly lost. I have cut out most of the logic and am now down to "glue" that amounts to about 45 LEs. I have four test pins that I reserved for debugging. Device is EPM1270.

If I build a new design that has no logic and just ties the clock input pin directly to all four test pins, it works. (The clock appears on all four test pins.) If I open the 45 LE project above and tie the four pins to the clock, I don't get the clock signal on any of the four outputs.

Here are the things that I have tried:

- I have tried this on two different computers.

- I have replaced the FPGA

- I have redrawn the logic

- I have deleted the DB folder

- I have re-installed Quartus II on my computer.

- Device does not get warm.

- I have checked all pin numbers

- VCC = 3.331

I can't come up with a strategy to solve this. I do get some warnings, nothing that looks significant.

I welcome any suggestions.

Regards- John