25 MHz Quartz Clock Frequency configuration details required in IMX8 for ETH PHY

[Ramanathan]

Hi Tean,

we are trying to enable 25 MHz Quartz Clock Frequency in IMX8 for ETH PHY.

Please share the Frequency configuration details. 

CONFIG2 --> RMII mode (25 MHz crystal)

Following Register not listed in datasheet

Register Address: 

0x045B

0x0455

Thanks!!!

Regards,

 S.Ramanathan

[Dhruvit]

Hi @Ramanathan,

For the 25MHz crystal, could you please confirm if you are referring to the external crystal that is connected with the PHY?

For the RMII interface, the processor provides 50MHz REF_CLK, as shown in the below image.

Dhruvit_0-1664456333265.png

(Note: This is from the i.MX8MM reference manual.)

And regarding the register you mentioned, could you please provide me with more information related to the same? And also, which processor are you referring to?

Thank you.

Best regards,
Dhruvit.