DP83869HM: Please help check the product application

Anita Wei

Part Number: DP83869HM

Dear,

Here is a question about TI PHY chip DY83869.

I am going to use this chip as RGMII-SGMII bridge mode, while not connecting to an ethernet PHY. It will connect to an Ethernet switch with SGMII port. Like below pic.,

Q1, I guess it works, right?

Q2, Anything special I need take care of for the application like this?

Thank you.

1 month ago

0 Gerome Cacho 1 month ago

TI__Mastermind 43015 points

Hi Anita,

Please ensure the PHY is properly strapped to RGMII-SGMII bridge. Other than that, everything should be okay. I would recommend SMI access if in case there is optimizations to be had on your application.

Sincerely,
Gerome

0 Anita Wei 1 month ago in reply to Gerome Cacho

Prodigy 50 points

Hi Gerome,

So at least following strape I shall make, right?

0 Gerome Cacho 1 month ago in reply to Anita Wei

TI__Mastermind 43015 points

Hello,

This is correct. Please ensure for bridge mode that the latter MAC interface is setting the speed (SGMII in your highlighted case). The RGMII will follow based upon what the SGMII has auto-negotiated to.

Sincerely,

Gerome

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DP83869HM: Please help check the product application