QSPI FLASH Output Signal showing glitches?? Trying to detrmine what is causing it?

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matthej

Joined Oct 10, 2020
61
Hi,
I am testing a QSPI NOR FLASH device on a board I designed. Although it is working, I am seeing some glitches on the SDO (serial output of FLASH) line. All other signals (inputs look fine).
I believe it is working because glitch goes away before clock edge happens.

Looks like glitch is happening on a transition boundary (ie when the signal could switch from 1 to 0 or 0 to 1 but won't).

I have attached some photos showing this. Any idea on what could be causing this?

Thanks!
 

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