dm9000b Davicom Semiconductor, Inc., dm9000b Datasheet - Page 31

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

8.5 Auto-negotiation Advertisement Register (ANAR) - 04
This register contains the advertised abilities of this DM9000B device as they will be transmitted to its link partner
during Auto-negotiation.
Final
Version: DM9000B-13-DS-F02
June 4, 2009
4.4-4.0
-4.11
4.15
4.14
4.13
4.12
4.10
4.9
4.8
4.7
4.6
4.5
Bit
Bit Name
Reserved
TX_HDX
TX_FDX
10_FDX
10_HDX
Selector
ACK
FCS
NP
RF
T4
<00001>, RW Protocol Selection Bits
0, RO/P
Default
0,RO/P
X, RW
0, RW
0, RW
1, RW
1, RW
1, RW
1, RW
0,RO
Next page Indication
1 = Next page available
0 = No next page available
The DM9000B has no next page, so this bit is permanently set to 0
Acknowledge
1 = Link partner ability data reception acknowledged
0 = Not acknowledged
The DM9000B's auto-negotiation state machine will automatically
control this bit in the outgoing FLP bursts and set it at the
appropriate time during the auto-negotiation process. Software
should not attempt to write to this bit.
Remote Fault
1 = Local device senses a fault condition
0 = No fault detected
Reserved
Write as 0, ignore on read
Flow Control Support
1 = Controller chip supports flow control ability
0 = Controller chip doesn’t support flow control ability
100BASE-T4 Support
1 = 100BASE-T4 is supported by the local device
0 = 100BASE-T4 is not supported
The DM9000B does not support 100BASE-T4 so this bit is
permanently set to 0
100BASE-TX Full Duplex Support
1 = 100BASE-TX full duplex is supported by the local device
0 = 100BASE-TX full duplex is not supported
100BASE-TX Support
1 = 100BASE-TX half duplex is supported by the local device
0 = 100BASE-TX half duplex is not supported
10BASE-T Full Duplex Support
1 = 10BASE-T full duplex is supported by the local device
0 = 10BASE-T full duplex is not supported
10BASE-T Support
1 = 10BASE-T half duplex is supported by the local device
0 = 10BASE-T half duplex is not supported
These bits contain the binary encoded protocol selector supported
by this node
<00001> indicates that this device supports IEEE 802.3 CSMA/CD
Ethernet Controller with General Processor Interface
Description
DM9000B
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