dm9000b Davicom Semiconductor, Inc., dm9000b Datasheet - Page 15

• Manufacturer Part Number: dm9000b
• Description: Ethernet Controller With General Processor Interface
• Manufacturer: Davicom Semiconductor, Inc.

6.2 Network Status Register (01H)
6.3 TX Control Register (02H)
6.4 TX Status Register I ( 03H ) for packet index I
Final
Version: DM9000B-13-DS-F02
June 4, 2009
Bit
Bit
1:0
Bit
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
RESERVED
RESERVED
RESERVED
RESERVED
CRC_DIS2
CRC_DIS1
PAD_DIS2
PAD_DIS1
WAKEST
EXCECM
TX2END
TX1END
SPEED
LINKST
TXREQ
RXOV
Name
Name
TJDIS
Name
TJTO
COL
NC
EC
LC
LC
PS0,RO
Default
RW/C1
RW/C1
RW/C1
PS0,RO
PS0,RO
PS0,RO
PS0,RO
PS0,RO
PS0,RO
Default
PS0,RW
PS0,RW
PS0,RW
PS0,RW
PS0,RW
PS0,RW
PS0,RW
X,RO
X,RO
0,RO
0,RO
Default
PS0,
PS0,
0,RO
P0,
0,RO
Media Speed 0:100Mbps 1:10Mbps, when Internal PHY is used. This bit has no
meaning when LINKST=0
Link Status 0:link failed 1:link OK,
Wakeup Event Status. Clears by read or write 1 (work in 8-bit mode)
This bit will not be affected after software reset
Reserved
TX Packet 2 Complete Status. Clears by read or write 1
Transmit completion of packet index 2
TX Packet 1 Complete status. Clears by read or write 1
Transmit completion of packet index 1
RX FIFO Overflow
Reserved
Transmit Jabber Time Out
It is set to indicate that the transmitted frame is truncated due to more than 2048
bytes are transmitted
Loss of Carrier
It is set to indicate the loss of carrier during the frame transmission. It is not valid in
internal Loop-back mode
No Carrier
It is set to indicate that there is no carrier signal during the frame transmission. It is
not valid in internal Loop-back mode
Late Collision
It is set when a collision occurs after the collision window of 64 bytes
Collision Packet
It is set to indicate that the collision occurs during transmission
Excessive Collision
It is set to indicate that the transmission is aborted due to 16 excessive collisions
Reserved
Reserved
Transmit Jabber Disable
When set, the transmit Jabber Timer (2048 bytes) is disabled. Otherwise it is
Enable
Excessive Collision Mode Control : 0:aborts this packet when excessive collision
counts more than 15, 1: still tries to transmit this packet
PAD Appends Disable for Packet Index 2
CRC Appends Disable for Packet Index 2
PAD Appends Disable for Packet Index 1
CRC Appends Disable for Packet Index 1
TX Request. Auto clears after sending completely
Ethernet Controller with General Processor Interface
Description
Description
Description
DM9000B
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