DP83822IF: RMII mater / Slave mode selection

Hi Eby,

The RMII master or slave configuration is decided based on availability of clocks.

In RMII Master operation, the device operates off of either a 25-MHz oscillator connected to XI pin or a 25-MHz crystal connected across XI and XO pins. In RMII Slave operation, the device operates off of a 50-MHz oscillator connected to the XI pin and shares the same clock as the MAC. Figures 8-5 and 8-6 in the datasheet show the difference in implementation. 

Thanks,

David

HI

So the Master / Slave assignment is just based on the clock source and there is no other operational difference right ?

Regards 

Eby

Hi Eby, 

That is correct. 

Thanks,

David

Thanks for the confirmation

You are welcome. Do you have any additional questions? If not, I will close this thread.

Thanks,

David