DS580 Datasheet, PDF (7/42 Pages) Xilinx, Inc – Optional MDIO interface for PHY access

LogiCORE IP XPS Ethernet Lite Media Access Controller
Transmit Flow
The flow chart in Figure 3 shows the high level flow followed for packet transmission.
X-Ref Target - Figure 3
Start
Transmit
F _Transmit
Enable?
T
T
Deferring?
F
Start
Transmission
Half duplex T
& Collision?
Send
Jam
F
Too
T
Many
F _Transmission
Attempts?
Done?
F
T
Done; Excessive
Deferral Error
Compute
Done;
Backoff
Transmit OK
Figure 3: Transmit Flow
Wait
Backoff
Time
DS580_03_041910
DS580 September 21, 2010
www.xilinx.com
7
Product Specification