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DmitryKo's avatar
DmitryKo
Icon for New Contributor rankNew Contributor
3 years ago

Signal Tap does not see differential signal REFCLK

Hi all, I am working with SOM board with Arria 10 SX on it. Signal Tap does not see differential clock signal from external freq generator. In the same time I see frequencies on external generator ...
Hdl
sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
3 years ago

So you're trying to tap signals operating at about 1 MHz and about 2.7 MHz? Then you have the opposite problem of what I mentioned. The signals are so slow that they don't appear in the time seen in the capture buffer. What is your trigger condition? If you trigger on these divided signals themselves, you should be able to see them.