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What is the most reliable way for clocking multiple devices

Question asked by Velasquez.Maziel on May 5, 2017
Latest reply on May 5, 2017 by Velasquez.Maziel

I have a SMT32F7 for control one STM32F4 for comms (ETH MII) and the ETH PHY and I was thinking either one of these (Inclining for number 3):

But I'm not an expert and would like to know what is the most reliable of these:

Or should I use 3 different clocks?

 

Thank for your help.

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