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Ethernet Module
D11 R TXAED 0 Transmit abort — excessive deferral
Set to 1 to indicate that the last Ethernet packet
was not transmitted successfully; packet
transmission was aborted due to excessive
deferral. Excessive deferral means that there was a
receive carrier on the Ethernet channel for a long
period of time, making it impossible for the
transmitter to try to transmit.
When this bit is set, the transmit frame is
automatically flushed from the transmit FIFO.
TXREGE and TXFIFOH in the Ethernet General
Status register become active when the FIFO is
ready to start receiving the next packet.
TXBC in the Ethernet General Status register
becomes active when TXAED is set.
D10 R TXAEC 0 Transmit abort — excessive collisions
Set to 1 to indicate that the last Ethernet packet
was not transmitted successfully; packet
transmission was aborted due to an excessive
number of collisions. The maximum number of
collisions allowed is determined by the RETRY field
in the Collisions Window/Collision Retry register.
When this bit is set, the transmit frame is
automatically flushed from the transmit FIFO.
TXREGE and TXFIFOH in the Ethernet General
Status register become active when the FIFO is
ready to start receiving the next packet.
TXBC in the Ethernet General Status register
becomes active when TXAEC is set.
Bits Access Mnemonic Reset Description
Table 58: Ethernet Transmit Status register bit definition