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Participant ami.kum
Participant
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Registered: ‎11-08-2018

UltraScale IDELAY3 Calibration

I am using the IDELAYE3 primitive and was reading AR#66013.  In that article it talks about calulating the Alignment delay by using the DELAY_VALUE = 0 and reading the CNTVALUEOUT. It also mentioned to reset the IDELAYCTRL.

 

Can you please confrim if I need to keep the IDELAYCTRL in reset or not. 

 

The user guide UG571 (v1.12) page 183 does not refer to any such requirement.

Per the user guide I am using 2 instances for IDELAYE3 in TIME mode, One has the DELAY_VALUE = 0 and other has DELAY_VALUE = 50 ps.

 

Please advice what is the correct method for getting the Alignment Delay. Does the IDELAYCTRL needs to be reset while I read the CNTVALUEOUT?

 

Thanks,

A

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