DP83869HM: RGMII to 1000Base-KX design for i.MX8MP

Part Number: DP83869HM
Other Parts Discussed in Thread: TLK10232, DP83869

Hello,

We are considering the following design approach for i.MX8MP to work for a 1000Base-kx.

This approach involves two ICs. The first IC (PN: DP83869HM) is tasked with converting RGMII signals to SGMII, while the second IC (PN: TLK10232) is responsible for handling SMGII signals and transitioning them to 1000BASE-KX, as illustrated in the accompanying image.

We know that the first IC (PN: DP83869HM) can be used as a bridge (RGMII-SGMII), but we haven't seen detail hardware design guidelines. Do you think this is viable? if so, can you give us the required information to proceed with this design?

By the way, the reason we chose this design is because the i.MX8MP doesn't support either SGMII or SERDES (1000Base-kx).

Thanks,

over 1 year ago

0 Hillman Lin over 1 year ago

TI__Mastermind 25955 points

Hi,

Thank you for sharing the information. Yes, DP83869 could perform RGMII to SGMII bridge mode. As long as DP83869 is strap or program into the required stage and SGMII and RGMII connection is good. DP83869 could run RGMII to SGMII really easily.

We do have schematic checklist on DP83869 that could help you with your design:

DP83869_Schematic_Checklist (public).xlsx

Regards,

Hillman Lin

0 AT over 1 year ago in reply to Hillman Lin

Prodigy 10 points

Hi Hillman,

Thank you for the quick reply. That's very helpful.

When we use it as a bridge mode (RGMII-SGMII), what are the requirements for the second part (PN: TLK10232) to convert the SGMII signal to 1000Base-KX? Is there a hardware and software guidelines that we can follow?

Again, thank you for your help.

0 Hillman Lin over 1 year ago in reply to AT

TI__Mastermind 25955 points

Hi,

I think this question would be better if you reach out to TLK10232. Unfortunately, we do not have guideline regarding to this.

Sincerely,

Hillman Lin

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DP83869HM: RGMII to 1000Base-KX design for i.MX8MP