zhuifeng0426 at gmail.com
Tue Mar 29 07:52:28 CDT 2011
Thanks Joel. Now i can understand :)
2011/3/29 Joel Jaeggli <joelja at bogus.com>
> check your xgmii specs...
> it's ddr so there is a bit on both clock rise and fall.
> 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
> > frequency of 156.25HZ. So, for transmit direction, the total transmit
> > should be 32*156.25=5Gbps, how 10G works with this interface?
> > Further, on PMA, the transmit rate become 312.5M characters per lane..
> > done this number come?
> > thanks!
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