DM9000A
Ethernet Controller with General Processor Interface
Preliminary datasheet
32
Version: DM9000A-DS-P03
Apr. 21, 2005
4.4-4.0
Selector
<00001>,
RW
Protocol Selection Bits
These bits contain the binary encoded protocol selector
supported by this node
<00001> indicates that this device supports IEEE 802.3
CSMA/CD
8.6 Auto-negotiation Link Partner Ability Register (ANLPAR) – 05
This register contains the advertised abilities of the link partner when received during
Auto-negotiation.
Bit
Bit Name
Default
Description
5.15
NP
0, RO
Next Page Indication
0 = Link partner, no next page available
1 = Link partner, next page available
5.14
ACK
0, RO
Acknowledge
1 = Link partner ability data reception acknowledged
0 = Not acknowledged
The DM9000A's auto-negotiation state machine will
automatically control this bit from the incoming FLP bursts.
Software should not attempt to write to this bit
5.13
RF
0, RO
Remote Fault
1 = Remote fault indicated by link partner
0 = No remote fault indicated by link partner
5.12-5.1
1
Reserved
0, RO
Reserved
Read as 0, ignore on write
5.10
FCS
0, RO
Flow Control Support
1 = Controller chip supports flow control ability by link
partner
0 = Controller chip doesn’t support flow control ability by
link partner
5.9
T4
0, RO
100BASE-T4 Support
1 = 100BASE-T4 is supported by the link partner
0 = 100BASE-T4 is not supported by the link partner
5.8
TX_FDX
0, RO
100BASE-TX Full Duplex Support
1 = 100BASE-TX full duplex is supported by the link partner
0 = 100BASE-TX full duplex is not supported by the link
partner
5.7
TX_HDX
0, RO
100BASE-TX Support
1 = 100BASE-TX half duplex is supported by the link
partner
0 = 100BASE-TX half duplex is not supported by the link
partner
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