From the above points, DeferLatched can never be asserted.So, the

Hi Igor,

When simulating for Tx half duplex mode, i noticed that though
DeferIndication signal is asserted by eth_txethmac,this is not
being used
to update the Tx BD status.
As I could notice,
In eth_macstatus module,DeferLatched is asserted :
if(DeferIndication & TxUsedData)
DeferLatched However,
TxUsedData (output of eth_txmac) is asserted if StartData(output of
tx
state machine) is asserted.In other words,TxUsedData is asserted
only
if Tx State machine is in StatePreamble or StateData[o] or
StateData[1].
And,DeferIndication signal is asserted by the eth_txstatem when the
state machine is in StateIdle.

the
eth_wishbone module,which uses DeferLatched for writing the BD
status
can never update the defer status.
Pl comment.
regards
Sandhya