DM9801
1M Home Phoneline Network Physical Layer Single Chip Transceiver
Preliminary
27
Version: DM9801-DS-P02
March 20, 2000
Auto-negotiation Advertisement Register(ANAR) - Register 4 (continued)
Bit
Bit Name
Default
Description
4.6
10_FDX
0, RO/P
10Base-T Full Duplex Support:
The DM9801 does not support this function. This bit is
permanently set to 0
4.5
10_HDX
1, RO/P
10Base-T Support:
1=10Base-T Half Duplex supported by the link partner
0=10Base-T Half Duplex not supported by the link partner
4.4-4.0
Selector
<00001>, RO/P
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.
Auto-negotiation Link Partner Ability Register (ANLPAR) - Register 5
This register contains the advertised abilities of the link partner as they are received during Auto-negotiation.
Bit
Bit Name
Default
Description
5.15
NP
0, RO/P
Next Page Indication:
0= Link partner, no next page available
1= Link partner, next page available
5.14
ACK
0, RO/P
Acknowledge:
1=Link partner ability data reception acknowledged
0=Not acknowledged
The DM9801's state machine will automatically control this bit.
Software should not attempt to write to this bit.
5.13
RF
0, RO/P
Remote Fault:
1=Remote fault indicated by link partner
0=No remote fault indicated by link partner
5.12-5.10
Reserved
0, RO
Reserved:
Write as 0, ignore on read
5.9
T4
0, RO/P
100Base-T4 Support:
The DM9801 does not support this function. This bit is
permanently set to 0
5.8
TX_FDX
0, RO/P
100Base-TX Full Duplex Support:
The DM9801 does not support this function. This bit is
permanently set to 0
5.7
TX_HDX
0, RO/P
100Base-TX Support:
The DM9801 does not support this function. This bit is
permanently set to 0
5.6
10_FDX
0, RO/P
10Base-T Full Duplex Support:
The DM9801 does not support this function. This bit is
permanently set to 0
5.5
10_HDX
0, RO
10Base-T Support:
1=10Base-T Half Duplex supported by the link partner
0=10Base-T Half Duplex not supported by the link partner
5.4-5.0
Selector
<00000>, RO
Protocol Selection Bits:
Link partner binary encoded protocol selector
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