DP83867IR: RGMII v1.3, v2.0

Taketo Sato

Part Number: DP83867IR

Hello team,

I have a question about RGMII PHY DP83867IRRGZ.

Does the device have internal delay on data and clock?

According to controller's PCB wiring instruction, for RGMII v1.3 1.5ns~2ns delay is required on clock to data by PCB trace routing, and for RGMII v2.0 it should be less than 50ps by equal length wiring.

Which should we follow for DP83867IRRGZ?

Best regards,

over 3 years ago

+1 Kallikuppa Sreenivasa over 3 years ago

TI__Guru**** 192339 points

Hello Taketo Sato,

hank you for the query.

The DP83867 provides TX and RX clock delay control. We have a range to program and this needs to be tested.

Regards,

Sreenivasa

0 Taketo Sato over 3 years ago in reply to Kallikuppa Sreenivasa

TI__Genius 10325 points

Hello Sreenivasa-san,

Thank you for your comment.

So the DP83867 can support both RGMII v1.3 and v2.0 by adjusting delay control via register setting or strap setting, correct?

Best regards,

+1 Kallikuppa Sreenivasa over 3 years ago in reply to Taketo Sato

TI__Guru**** 192339 points

Hello Taketo Sato,

Thank you for the reply.

You can adjust the delay between 0.25nS to 4nS depending on the interface and the layout.

Regards,

Sreenivasa

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DP83867IR: RGMII v1.3, v2.0