dm9000b Davicom Semiconductor, Inc., dm9000b Datasheet - Page 29

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

8.2 Basic Mode Status Register (BMSR) - 01
Final
Version: DM9000B-13-DS-F02
June 4, 2009
1.10-1.7
1.15
1.14
1.13
1.12
1.11
1.6
1.5
1.4
1.3
1.2
Bit
Auto-negotiation
Auto-negotiation
100BASE-TX
100BASE-TX
MF preamble
100BASE-T4
Remote fault
suppression
half-duplex
half-duplex
10BASE-T
10BASE-T
Link status
full-duplex
full-duplex
Bit Name
Reserved
Complete
ability
0, RO/LH
0,RO/LL
Default
0,RO/P
1,RO/P
1,RO/P
1,RO/P
1,RO/P
1,RO/P
0,RO
1,RO
0,RO
100BASE-T4 Capable
1 = DM9000B is able to perform in 100BASE-T4 mode
0 = DM9000B is not able to perform in 100BASE-T4 mode
100BASE-TX Full Duplex Capable
1 = DM9000B is able to perform 100BASE-TX in full duplex mode
0 = DM9000B is not able to perform 100BASE-TX in full duplex
mode
100BASE-TX Half Duplex Capable
1 = DM9000B is able to perform 100BASE-TX in half duplex mode
0 = DM9000B is not able to perform 100BASE-TX in half duplex
mode
10BASE-T Full Duplex Capable
1 = DM9000B is able to perform 10BASE-T in full duplex mode
0 = DM9000B is not able to perform 10BASE-TX in full duplex mode
10BASE-T Half Duplex Capable
1 = DM9000B is able to perform 10BASE-T in half duplex mode
0 = DM9000B is not able to perform 10BASE-T in half duplex mode
Reserved
Read as 0, ignore on write
Frame Preamble Suppression
1 = PHY will accept management frames with preamble suppressed
0 = PHY will not accept management frames with preamble
suppressed
Auto-negotiation Complete
1 = Auto-negotiation process completed
0 = Auto-negotiation process not completed
Remote Fault
1 = Remote fault condition detected (cleared on read or by a chip
reset). Fault criteria and detection method is DM9000B
implementation specific. This bit will set after the RF bit in the
ANLPAR (bit 13, register address 05) is set
0 = No remote fault condition detected
Auto Configuration Ability
1 = DM9000B is able to perform auto-negotiation
0 = DM9000B is not able to perform auto-negotiation
Link Status
1 = Valid link is established (for either 10Mbps or 100Mbps
operation)
0 = Link is not established
The link status bit is implemented with a latching function, so that the
occurrence of a link failure condition causes the link status bit to be
cleared and remain cleared until it is read via the management
interface
Ethernet Controller with General Processor Interface
Description
DM9000B
29