Rainbow Electronics W90N745CDG - Manual (Page 105)

W90N745CD/W90N745CDG
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Tx Descriptor Word 2
31 30 29 28 27 26 25 24
CCNT Reserved SQE PAU TXHA
23 22 21 20 19 18 17 16
LC TXABT NCS EXDEF TXCP Reserved DEF TXINTR
15 14 13 12 11 10 9 8
TBC
7 6 5 4 3 2 1 0
TBC
CCNT [31:28]: Collision Count
The CCNT indicates the how many collision occurred consecutively during a packet transmission. If
the packet incurred 16 consecutive collisions during transmission, the CCNT will be 4’h0 and bit
TXABT will be set to 1.
SQE [26]: SQE Error
The SQE indicates the SQE error found at end of packet transmission on 10Mbps half-duplex mode.
The SQE error check will only be done while both bit EnSQE of MCMDR is enabled and EMC is
operating on 10Mbps half-duplex mode.
1’b0: No SQE error found at end of packet transmission.
1’b0: SQE error found at end of packet transmission.
PAU [25]: Transmission Paused
THE PAU INDICATES THE NEXT NORMAL PACKET transmission process will be paused temporally
because EMC received a PAUSE control frame, or S/W set bit SDPZ of MCMDR and make EMC to
transmit a PAUSE control frame out.
1’b0: Next normal packet transmission process will go on.
1’b1: Next normal packet transmission process will be paused.
TXHA [24]: Transmission Halted
The TXHA indicates the next normal packet transmission process will be halted because the bit TXON
of MCMDR is disabled be S/W.
1’b0: Next normal packet transmission process will go on.
1’b1: Next normal packet transmission process will be halted.