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iMX8M PCIe Reference Clock

Question asked by nathan.zuber@astronics.com on Nov 27, 2018
Latest reply on Nov 29, 2018 by igorpadykov

The datasheet for the PCIE reference clock input specifies a max cycle to cycle jitter of 35ps.  

The hardware developers guide indicates using the IDT 9FGV0241 will work in this application

However, this datasheet's maximum cycle to cycle jitter is specified at 50ps

 

35ps seems like a pretty tight spec based on looking at some other PCIe parts, so I assume it has been specified because something breaks when jitter gets beyond that.

 

What happens to the PCIe link if the jitter spec is violated (how was that spec determined)?

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