29 Mar
2011
29 Mar
'11
8:36 a.m.
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!