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DmitryKo's avatar
DmitryKo
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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
FvM's avatar
FvM
Icon for Super Contributor rankSuper Contributor
3 years ago
Hi,
GXB transceiver are dedicated hardware and not part of the FPGA fabric. Their refclk input can't be tapped by Signaltap.
DmitryKo's avatar
DmitryKo
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3 years ago

Hi, FvM

Thank you for reply.

I tapped not REFCLK input immediately, but output of counter which feed from REFCLK. Or does it not matter?