Forum Discussion
CheepinC_altera
Regular Contributor
5 years agoHi,
Sorry for the delay. Regarding your inquiry on the clocks, please see my comment as following:
1. There is not specific requirement that the XCVR reconfig IP refclk need to be at the same frequency or clock with the reset controller.
2. Note that normally to ease the connection, I will tied the clocks for reset controller and reconfig controller. You can give it a try as well.
3. For the XCVR reconfig clock, it is mandatory to have it sourced directly from a free-running and stable clock source. This is to ensure successful power up offset cancellation. It is also recommneded for the Native PHY refclk to be free-running as well.
Please let me know if there is any concern. Thank you.