NUC910ABN Datasheet, PDF (101/669 Pages) Nuvoton Technology Corporation – 32-bit ARM926EJ-S Based Microcontroller

NUC910ABN
Tx Descriptor Word 2
31
30
29
CCNT
23
22
21
LC
TXABT
NCS
15
14
13
7
6
5
32-BIT ARM926EJ-S BASED MCU
28
27
Reserved
20
19
EXDEF
TXCP
12
11
TBC
4
3
TBC
26
SQE
18
Reserved
10
2
25
PAU
17
DEF
9
1
24
TXHA
16
TXINTR
8
0
Bits
Descriptions
[31:28] CCNT
[26]
SQE
[25]
PAU
[24]
TXHA
[23]
LC
Collision Count
The CCNT indicates the how many collisions 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 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.
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.
P 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.
Late Collision
The LC indicates the collision occurred in the outside of 64 bytes collision
window. This means after the 64 bytes of a frame has transmitted out to
the network, the collision still occurred. The late collision check will only
be done while EMC is operating on half-duplex mode.
1’b0: No collision occurred in the outside of 64 bytes collision window.
1’b1: Collision occurred in the outside of 64 bytes collision window.
Publication Release Date: Jun. 18, 2010
101
Revision: A4