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

Ramanathan — Mon, 26 Sep 2022 06:25:16 GMT

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

0x045B

0x0455

Thanks!!!

Regards,

S.Ramanathan

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

Dhruvit — Thu, 29 Sep 2022 13:02:52 GMT

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.

Processor Expert SoftwareのトピックRe: 25 MHz Quartz Clock Frequency configuration details required in IMX8 for ETH PHY

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

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