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ETHERNET COMMUNICATION MODULE
Ethernet Transmit Status register
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Register bit
assignment
Bits Access Mnemonic Reset Description
D31:16 N/A Reserved N/A N/A
D15 R TXOK 0x0 Frame transmitted OK
When set, indicates that the frame has been delivered to
and emptied from the transmit FIFO without problems.
D14 R TXBR 0x0 Broadcast frame transmitted
When set, indicates the frame’s destination address was
a broadcast address.
D13 R TXMC 0x0 Multicast frame transmitted
When set, indicates the frame’s destination address was
a multicast address.
D12 R TXAL 0x0 TX abort — late collision
When set, indicates that the frame was aborted due to a
collision that occurred beyond the collision window set
in the Collision Window/Retry register. If this bit is set,
the
TX_WR logic stops processing frames and sets the
TXERR bit in the Ethernet Interrupt Status register.
D11 R TXAED 0x0 TX abort — excessive deferral
When set, indicates that the frame was deferred in
excess of 6071 nibble times in 100 Mbps or 24,287
times in 0 Mbps mode. This causes the frame to be
aborted if the excessive deferral bit is set to 0 in MAC
Configuration Register #2. If TXAED is set, the
TX_WR logic stops processing frames and sets the
TXERR bit in the Ethernet Interrupt Status register.
D10 R TXAEC 0x0 TX abort — excessive collisions
When set, indicates that the frame was aborted because
the number of collisions exceeded the value set in the
Collision Window/Retry register. If this bit is set, the
TX_WR logic stops processing frames and sets the
TXERR bit in the Ethernet Interrupt Status register.
D09 R TXAUR 0x0 TX abort — underrun
When set, indicates that the frame was aborted because
the TX_FIFO had an underrun. If this bit is set, the
TX_WR logic stops processing frames and sets the
TXERR bit in the Ethernet Interrupt Status register.