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DM9601
USB to Ethernet MAC Controller with Integrated 10/100 PHY
20
Final
Version: DM9601-DS-F01
June 22, 2002
10.3 TX Control Register (02H)
Bit
Name
Default
Description
7
RESERVED
0,RO
Reserved
6
TJDIS
0,RW
Transmit Jabber Disable
When set, the transmit Jabber Timer(2048 bytes) is disabled. Otherwise it is
enabled
5
EXCECM
0,RW
Excessive Collision Mode Control
0 = abort this packet when excessive collision count more than 15
1 = still try to transmit this packet
4
PAD_DIS2
0,RW
PAD appends disable for packet index 2.
3
CRC_DIS2
0,RW
CRC appends disable for packet index 2
2
PAD_DIS1
0,RW
PAD appends disable for packet index 1
1
CRC_DIS1
0,RW
CRC appends disable for packet index 1
0
RESERVED
0,RO
Reserved
10.4 TX Status Register I ( 03H ) for packet index 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 there is 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 that 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 that the transmission is aborted due to 16 excessive collisions.
1:0
RESERVED
0,RO
Reserved
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