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Re: [10GBT] Functional block diagram

Sanjay,
 
Looks good, but I have some more comments:
 
- Missing TXC<3:0> into PCS Transmit
- TX_EN has no source, I think you intended for PHY Control to be the source
- 10GBTreceive is not needed, in 1000BASE-T the '1000BTreceive' was used for carrier sense and collision detection.
- In my print out there are very faint remnants of lines from the original diagram that haven't been deleted. You can see these as objects when you ungroup the diagram.
 
Brett
-----Original Message-----
From: stds-802-3-10gbt@IEEE.ORG [mailto:stds-802-3-10gbt@IEEE.ORG]On Behalf Of Sanjay Kasturia
Sent: Thursday, July 08, 2004 11:17 PM
To: STDS-802-3-10GBT@listserv.ieee.org
Subject: Re: [10GBT] Functional block diagram

Brett,
 
See attached. I made the changes you suggested to reflect that the left side interface is now XGMII and not GMII. I also removed the Carrier Sense function since 10GBASE-T will not operate in half duplex mode.
 
I pulled the Transmit Enable function into the PCS Transmit block since the removal of the TX_EN signal left all inputs to this coming from the PCS transmit block so it can be detailed out in the description of the PCS Transmit function.
 
In the attached file I have also included the clause 48 and clause 49 figures so others can easily take a look at them. In one sense it doesn't matter what you start from. In the end, the functional diagram for 10GBASE-T has to stand on its own merits. I find that the the clause 40 figure provides more detail on the MDI interface and many of the functions in the PMA and MDI will operate logically as they did in 1000BASE-T and the structure of the interface primitives.
 
We will probably have to borrow some of the Synch, Frame and Deskew functions from .3ae from the clauses you suggested to describe operation of the XGMII to PCS operation.
 
Regards,
 
Sanjay Kasturia
Editor-in-chief, 802.3an
 
sanjay@teranetics.com
cell (650) 704-7686
office (408) 653-2235
 

From: stds-802-3-10gbt@IEEE.ORG [mailto:stds-802-3-10gbt@IEEE.ORG] On Behalf Of Brett McClellan
Sent: Tuesday, July 06, 2004 9:34 AM
To: STDS-802-3-10GBT@listserv.ieee.org
Subject: Re: [10GBT] Functional block diagram

Sanjay,
 
I'm wondering whether the 1000BASE-T diagram is the right starting point. Perhaps We should start with the clause 48 or 49 diagram and build on that.
Otherwise, your diagram need the following revisions:
 
- XGMII interface should be: TX_CLK, TXD<31:0>, TXC<3:0> and RX_CLK, RXD<31:0>,RXC<3:0>
- remove: COL, TX_EN, TX_ER, RX_DV, RX_ER, CRS (actually the entire carrier sense block should be removed)
 
Brett