Rainbow Electronics W90P710CDG User Manual
Page 105
W90P710CD/W90P710CDG
Publication Release Date: September 19, 2006
- 105 -
Revision B2
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.