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DP83640: some issues

Amy Luo
Expert 6895 points
Part Number: DP83640

Hi team,

One of our customer's issues, I'm forwarding it below, could you please provide some troubleshooting suggestions? And I am not familiar with Ethernet, if there are any inaccuracies in the translation, please do not hesitate to ask.

issues:

Do I need an external synchronous Ethernet chip and a phase-locked loop circuit in the synchronous Ethernet mode of the DP83640?

How does the main clock send the time code information, and how does it accept the time code information when slave clock enables synchronous Ethernet mode? Is there an official reference code for Synchronous Ethernet?

Or can synchronous Ethernet mode be achieved using the DP83840 chip alone?

Best Regards,

Amy Luo