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I have tried enabling SignalTap and
probing the output pins during the write operation, SignalTap reports
correct operation but the outputs, as measured on a real logic
analyser, are wrong.
E.g. for CHANNEL=1, eeprom_en='0', path=0 I should get 0,0,0,0,B,A,
3,2, I actually get 0,0,0,0,9,8,3,2
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When even SignalTap reports correct behavior, it looks like a problem that is related to your hardware somehow, e.g. an incorrect pin-out, bad soldering-joint or a short-circuit between two pins, etc. Have you measured also with a scope to see if you get clean logic-levels on the outputs?
Thomas
Honored Contributor
