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Switch reference clock input of AD9549

Question asked by jluqueq on Mar 24, 2016
Latest reply on Mar 24, 2016 by neilw


I am trying to switch the reference clock input from REF_B to REF_A, but the chip continues locking with the REFA Clock.

The registers have been set with these values below.


Reg : Value

0100 : 30 -- enable single tone, close loop off

01C0 : 04 --automatic control on

01C1 : 00 --disable auto switch-over, select REF A

0100 : 11 --disable single tone and close loop on


The REFSELECT (Pin 56) is not used.


Is there any other register to be configured?


Kind regards,