This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LMX2571: Synchronizing multiple devices

Part Number: LMX2571
Other Parts Discussed in Thread: LMX2594, LMX2572

Tool/software:

Hello, I was wondering if there is a method to synchronize multiple LMX2571 devices across different boards if they are all clocked with the same Reference Oscillator.

Is there an order in which to program the SPI bus registers that would help with this? 

Is there a method to reset the fractional counters together?

What if they were programmed on the same exact SPI signals in parallel?

What if the devices are booted without the reference clock, programmed with SPI, then introduced the Reference Oscillator at the same time?

If all of the above methods will not synchronize the part, do you offer a similar synthesizer chip that has an external reset that can synchronize the fractional dividers?

I can see that my multiple LMX2571s are PLL locked with eachtoher, but they sometimes wake up out of phase. I have to issue full board reset to sometimes get lucky and have the devices wake up locked and in phase.