DM9601
USB to Ethernet MAC Controller with Integrated 10/100 PHY
Final
21
Version: DM9601-DS-F01
June 22, 2002
10.5 TX Status Register II ( 04H ) for packet index I I
Bit
Name
Default
Description
7
TJTO
0,RO
Transmit Jabber Time Out
It is set to indicate the transmitted frame is truncated due to more than 2048 bytes
are transmitted
6
LC
0,RO
Loss of Carrier
It is set to indicate the loss of carrier during the frame transmission. It is not valid in
internal loopback mode
5NC
0,RO
No Carrier
It is set to indicate that no carrier signal during the frame transmission. It is not valid
in internal loopback mode
4
LC
0,RO
Late Collision
It is set to indicate a collision occurs after the collision window of 64 bytes
3
COL
0,RO
Collision Packet
Collision occurs during transmission
2
EC
0,RO
Excessive collision
It is set to indicate the transmission is aborted due to 16 excessive collisions
1:0
RESERVED
0,RO
Reserved
10.6 RX Control Register ( 05H )
Bit
Name
Default
Description
7
RESERVED
0,RO
Reserved
6
WTDIS
0,RW
Watchdog Timer Disable
When set, the Watchdog Timer (2048 bytes) is disabled. Otherwise it is enabled
5
DIS_LONG
0,RW
Discard Long Packet, packet length over 1522byte
4
DIS_CRC
0,RW
Discard CRC Error Packet
3
ALL
0,RW
Pass All Multicast
2
RUNT
0,RW
Pass Runt Packet
1
PRMSC
0,RW
Promiscuous Mode
0
RXEN
0,RW
RX Enable
10.7 RX Status Register ( 06H )
Bit
Name
Default
Description
7
RF
0,RO
Runt Frame
It is set to indicate the received frame has the size smaller than 64 bytes.
6
MF
0,RO
Multicast Frame
It is set to indicate the received frame has a multicast address.
5
LCS
0,RO
Late Collision Seen
It is set to indicate that a late collision found during the frame reception.
4
RWTO
0,RO
Receive Watchdog Time-Out
It is set to indicate that receive more than 2048 bytes.
3
PLE
0,RO
Physical Layer Error
It is set to indicate that a physical layer error found during the frame reception.
2
AE
0,RO
Alignment Error
It is set to indicate that the received frame ends with a non-byte boundary.
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