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
cell (650) 704-7686
office (408)
653-2235
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
functional2.rtf