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ADF4355 Glitchless Frequency Change

Question asked by bpoladian on Jul 7, 2017
Latest reply on Aug 17, 2017 by icollins

Each time I write to the ADF4355 to change the divider values, there's a momentary clock interruption that causes my FPGA's PLLs to lose/reacquire lock.  This happens even if I'm not changing values, but just rewriting register 0 with identical values.  Is it possible to glitchlessly change frequency?  If so, what is the preferred sequence of register writes?  Thanks!

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