DP83620: Need MDC Frequency wrt RMII

Palanikumar E

Part Number: DP83620

Hi Experts,

We are using DP83620 Ethernet PHY Transceiver in our design. In datasheet, section 4.7 AC Specifications — MII Serial Management Timing table MDC Clock Frequency provided. We need MDC Clock Frequency of the same wrt to RMII Interface. Please provide the Frequency of the same.

Regards,

Palanikumar E

11 months ago

0 Gerome Cacho 11 months ago

TI__Mastermind 32485 points

Hello,

Thank you for your response. Please note the US offices are closed for Thanksgiving Holiday and will look to reopen next week.

Sincerely,

Gerome

0 Gerome Cacho 11 months ago in reply to Gerome Cacho

TI__Mastermind 32485 points

Hello,

MDC frequency is independent of RMII. Please operate the SMI bus at the frequency noted in the datasheet.

Sincerely,

Gerome

0 Palanikumar E 11 months ago in reply to Gerome Cacho

Prodigy 50 points

Hi Gerome,

Understood. In datasheet SMI Bus Frequency need to be operated Typ 2.5MHz to 25MHz. Is there any way to configure that from Processor. We also raised query regarding this in e2e. I have attached link for your reference.

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1295623/am625-changing-mdio-interface-clock-frequency-on-am625-processor

Regards,

Palanikumar E

0 Gerome Cacho 11 months ago in reply to Palanikumar E

TI__Mastermind 32485 points

Hello,

Unfortunately, this is a question best served by the processor team. From a PHY standpoint, so long as you give the PHY the datasheet outline parameters, then the device should operate as expected.

Sincerely,

Gerome

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DP83620: Need MDC Frequency wrt RMII