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DRA821U: USXGMII interface match with external switch function through LVDS <-> CML mode use which method?

Tao Han
Expert 6415 points
Part Number: DRA821U

Hi experts:

Now we meet design compatible request that DRA821U match Realteck switch. 

The compatible design VBB power supply use VDDA_0P8_SERDES0 or VDDA_1P8_SERDES0? Based on TDA4VM: Ethernet CML connection - SGMII 2.5Gbpbs - Processors forum - Processors - TI E2E support forums use 1P8_SERDES0 but from datasheet maybe use serdes0 analog power supply 0V8 maybe more resonable. 

Match circuit follow those notes. (www.ti.com/.../scaa059c.pdf)

Please help us double confirm it.

Best Regards!

Han Tao