cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 
Highlighted
Observer
Observer
469 Views
Registered: ‎10-01-2019

Ethernet 10g

Jump to solution

In ethernet 10g base R ,how gearbox is converting 66 bit encoded bits to 16 bits..any materials to know abt  functions of gearbox,Gearbox working..

10g.jpg
0 Kudos
1 Solution

Accepted Solutions
Highlighted
Xilinx Employee
Xilinx Employee
386 Views
Registered: ‎04-16-2008

10G Ethernet uses 64/66B encoding.  The TX Gearbox combines the 64/66B payload(64-bits) and header(2-bits).  The RX Gearbox seperates the 64/66B payload and header.  In US/US+ most core option use the asynchronous gearbox in the GT so the clock domain crossing from the 64-bit clock to 66-bit clock is done in the GT.  In 7-Series the core uses the synchronous geabox in the GT and the cross domain crossing is done in fabric.  More information can be found in the specific GT UG for the transceiver you are planning to target.

-------------------------------------------------------------------------
Don’t forget to reply, kudo, and accept as solution.
-------------------------------------------------------------------------

View solution in original post

1 Reply
Highlighted
Xilinx Employee
Xilinx Employee
387 Views
Registered: ‎04-16-2008

10G Ethernet uses 64/66B encoding.  The TX Gearbox combines the 64/66B payload(64-bits) and header(2-bits).  The RX Gearbox seperates the 64/66B payload and header.  In US/US+ most core option use the asynchronous gearbox in the GT so the clock domain crossing from the 64-bit clock to 66-bit clock is done in the GT.  In 7-Series the core uses the synchronous geabox in the GT and the cross domain crossing is done in fabric.  More information can be found in the specific GT UG for the transceiver you are planning to target.

-------------------------------------------------------------------------
Don’t forget to reply, kudo, and accept as solution.
-------------------------------------------------------------------------

View solution in original post