DP83869HM: RGMII interface VIH/VIL

Hello Andrew

Thank you for the reply. 

The internal LDO is for the analog.

Do you have a schematics or information on the supplies connected to the DP83869.

Regards,

Sreenivasa

Hi Sreenivasa,

Thanks for feedback.

Customer is not yet drawing sch, they are wondering if a level shift is required for RGMII interface?

Or anything we need to pay attention to when provide power to DP83869?

Thanks!

Andrew

Hello Andrew

Thank you for the reply.

I assume customer will be using 1.8V for the VDDIO. he PHY does not allow 1.5V.

It depend on the output level and the loading including the trace length.

The PHY will output 1.8V on the output for Rx and i am not sue if this is OK for the I.MX ? 

If you add a level shifter, these have to be on both directions.

Regard,

Sreenivasa

Thank you! Sreenivasa.

So, RGMII interface needs auto bi-directional level shift like TXB? TXB BW is around 100Mbps to 140Mbps, and RGMII is also 100Mbps bus, is my understanding correct?

Thanks!

Andrew