TDA4VH-Q1: TDA4VH-Q1

Hanson Chen

Prodigy 10 points

Part Number: TDA4VH-Q1

Hi,

Document says it support 5Gb XFI.

>>Two ports support 5Gb, 10Gb USXGMII or 5Gb XFI

But XFI should only support 10Gb, right?

Could you please help confirm that XFI can support 5Gb?

Thanks

Best Regards,

Hanson

over 1 year ago

0 Tanmay Patil over 1 year ago

TI__Mastermind 38400 points

Hi Hanson,

Please refer to this thread : https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1214120/tda4vh-q1-usxgmii-xfi-difference#:~:text=Both%20will%20use%20the%20same,XFI%20will%20only%20support%2010G.&text=Thanks%20for%20your%20reply.

Let me know if you have any more questions.

Regards,
Tanmay

0 Hanson Chen over 1 year ago in reply to Tanmay Patil

Prodigy 10 points

Hi Tanmay，

>>Both will use the same serdes Tx+/- and Rx+/- signals. At 10g rates, both will use the same rate of 10.3125 Gbps and 64B/66B encoding. The difference is that USXGMII will be able to support multiple link rates (10M/100M/1000M/2.5G/5G/10G) while XFI will only support 10G

I think the above comment of reference thread is clear that XFI will only support 10G.

Why does the document says 5Gb XFI as below, is it a typo in the document?

>>Two ports support 5Gb, 10Gb USXGMII or 5Gb XFI

Thanks

Best Regards,

Hanson

0 Tanmay Patil over 1 year ago in reply to Hanson Chen

TI__Mastermind 38400 points

Hi Hanson,

XFI can also support 5G links. Please see the comments from hardware experts on this:

The XFI is both a IEEE and Cisco interface. 802.3-Clause-49 or USXGMII from Cisco.

It is the single serial MII for 10G MAC to Phy or SFP modules.

It is the 10GBase-R chip to chip interface, used between the controller and 10GBase copper/fiber Phys.

Cisco used the same interface with optional preamble stuff in the USXGMII interface.

Optical modules are connected to a host by either a XAUI (https://en.wikipedia.org/wiki/XAUI), XFI (https://en.wikipedia.org/wiki/XFI) or SerDes Framer Interface (https://en.wikipedia.org/wiki/SerDes_Framer_Interface) (SFI) interface.

XENPAK, X2, and XPAK modules use XAUI to connect to their hosts. XAUI (XGXS) uses a four-lane data channel and is specified in IEEE 802.3 Clause 47.

XFP modules use a XFI interface and SFP+ modules use an SFI interface. XFI and SFI use a single lane data channel and the 64b/66b encoding (https://en.wikipedia.org/wiki/64b/66b_encoding) specified in IEEE 802.3 Clause 49 at 10.3125Ghz.

Regards,
Tanmay

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TDA4VH-Q1: TDA4VH-Q1