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Adventurer
Adventurer
262 Views
Registered: ‎03-28-2014

Phase Sync ZCU111 to external 10MHz reference

I'm trying to use an external 10MHz reference as the input to the LMK04208 chip on the ZCU111 and have the  resulting clock be synced in phase relative to the reference clock. I've gotten to the point where I can generate a stable output off of the external 10MHz reference, but it seems like phase syncing requires using CLKin1 as a feedback clock instead of an input source.

Is there any way to do an internal feedback (instead of external) with the 0-Delay setting and have the device phase synced to the input clock?

TICS Pro .tcs file renamed to .tcs.txt due to forum restrictions....

 

dcwhitehead_0-1598286719060.png

 

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Moderator
Moderator
111 Views
Registered: ‎04-18-2011

probably more of a question for the TI forum. 

i've used clkout5 here to synch to an external instrument before but i've not used an external input to clock this PLL.

I heard a proposal to use a 10mhz input let me check to see if i have a TicsPro profile that does this. 

Keith

 

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Adventurer
Adventurer
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Registered: ‎03-28-2014

Thanks Keith.

The posted configuration will successfully take in a 10MHz reference and generate the proper clocks, but I am trying to get the clock phase synced so I can sample on two different ZCU111 boards with the same phase relationship.

Right now, every power cycle the clocks on the two boards come up with different phase relationships. I think this should be doable but still have not figured it out.
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