DM9008AEP_06 Datasheet, PDF (15/50 Pages) Davicom Semiconductor, Inc. – Ethernet Controller with General Processor Interface

DM9008AEP
Ethernet Controller with General Processor Interface
6.5 TX Status Register II ( 04H ) for packet index I I
Bit
Name
Default
Description
Transmit Jabber Time Out
7
TJTO
PHS0,RO It is set to indicate that the transmitted frame is truncated due to more than 2048
bytes are transmitted
Loss of Carrier
6
LC
PHS0,RO It is set to indicate the loss of carrier during the frame transmission. It is not valid in
internal loopback mode
No Carrier
5
NC
PHS0,RO 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
PHS0,RO
Late Collision
It is set when a collision occurs after the collision window of 64 bytes
3
COL
PHS0,RO Collision packet, collision occurs during transmission
2
EC
PHS0,RO
Excessive Collision
It is set to indicate that the transmission is aborted due to 16 excessive collisions
1:0 RESERVED 0,RO Reserved
6.6 RX Control Register ( 05H )
Bit
Name
Default
7 RESERVED PHS0,RW
6
WTDIS PHS0,RW
5 DIS_LONG PHS0,RW
4 DIS_CRC PHS0,RW
3
ALL
PHS0,RW
2
RUNT PHS0,RW
1
PRMSC PHS0,RW
0
RXEN PHS0,RW
Description
Reserved
Watchdog Timer Disable
When set, the Watchdog Timer (2048 bytes) is disabled. Otherwise it is enabled
Discard Long Packet
Packet length is over 1522byte
Discard CRC Error Packet
Pass All Multicast
Pass Runt Packet
Promiscuous Mode
RX Enable
6.7 RX Status Register ( 06H )
Bit
Name
Default
7
RF
PHS0,RO
6
MF
PHS0,RO
5
LCS
PHS0,RO
4
RWTO PHS0,RO
3
PLE
PHS0,RO
2
AE
PHS0,RO
1
CE
PHS0,RO
0
FOE
PHS0,RO
Description
Runt Frame
It is set to indicate that the size of the received frame is smaller than 64 bytes
Multicast Frame
It is set to indicate that the received frame has a multicast address
Late Collision Seen
It is set to indicate that a late collision is found during the frame reception
Receive Watchdog Time-Out
It is set to indicate that it receives more than 2048 bytes
Physical Layer Error
It is set to indicate that a physical layer error is found during the frame reception
Alignment Error
It is set to indicate that the received frame ends with a non-byte boundary
CRC Error
It is set to indicate that the received frame ends with a CRC error
FIFO Overflow Error
It is set to indicate that a FIFO overflow error happens during the frame reception
Preliminary
15
Version: DM9008AEP-DS-P03
Dec. 14, 2006