TDA4VH-Q1: SGMII interfaces support Clock recovery?

Peter Warnqvist37

Part Number: TDA4VH-Q1

Hello TI forum!

Could you confirm that the SGMII interfaces on TDA4VH-Q1 supports clock recovery from the SGMII receive data signal, i.e. do not require a separate SGMII receive clock signal from the external PHY for that?

4 months ago

0 ShreyasRao 4 months ago

TI__Guru 64010 points

Hi Peter,

Yes, SoC RX supports clock data recovery without using an external signal. It also supports internal 100MHz reference clock.

0 Peter Warnqvist37 3 months ago in reply to ShreyasRao

Prodigy 190 points

Hello!

Thank you for your answer!

Could you elaborate a bit about the internal 100MHz clock you mention? What is it used or intended for now when it is established that the SoC itself has built -in clock recovery? Or is this internal reference clock a part of the SoC´s standalone clock recovery functionality?

0 ShreyasRao 3 months ago in reply to Peter Warnqvist37

TI__Guru 64010 points

Hi Peter,

This is the internal reference clock which is required to generate the required transmitter baud rate of the protocol in the high speed SERDES.

It can also be driven out of the SERDES_REFCLK pins to sync b/w the SoC and the PHY if needed instead of using an external oscillator or ext reference clock.

0 Peter Warnqvist37 3 months ago in reply to ShreyasRao

Prodigy 190 points

Ok, thanks for the clarification!

Best regards,
Peter

Processors

Processors forum

TDA4VH-Q1: SGMII interfaces support Clock recovery?