XGMII interface

Tue Mar 29 12:36:09 UTC 2011

check your xgmii specs...

it's ddr  so there is a bit on both clock rise and fall.

http://en.wikipedia.org/wiki/10_Gigabit_Media_Independent_Interface

On 3/29/11 5:27 AM, yifeng zhou wrote:
> Dears:
> 
> As in IEEE 802.3 clause 46, in 10G Ethernet, RS and PCS may use XGMII
> interface to inter-connect.
> 
> XGMII interface is a 32-bit wide, transmit & receive data path, working on
> frequency of 156.25HZ. So, for transmit direction, the total transmit rate
> should be 32*156.25=5Gbps, how 10G works with this interface?
> 
> Further, on PMA,  the transmit rate become 312.5M characters per lane.. how
> done this number come?
> 
> thanks!
> 