AM79C873 Advanced Micro Devices, AM79C873 Datasheet - Page 24

• Manufacturer Part Number: AM79C873
• Description: NetPHY -1 10/100 Mbps Ethernet Physical Layer Single-Chip Transceiver with 100BASE-FX Support
• Manufacturer: Advanced Micro Devices

Auto-Negotiation Advertisement
Register(ANAR) - Register 4
This register contains the advertised abilities of the NetPHY-1 device as they will be transmitted to link partners dur-
ing Auto-Negotiation.
24
4.12-4.11
4.4-4.0
4.15
4.14
4.13
4.10
Bit
4.9
4.8
4.7
4.6
4.5
Bit Name
Reserved
TX_FDX
TX_HDX
10_HDX
10_FDX
Selector
ACK
FCS
NP
RF
T4
<00001>, RW
0, RO/P
Default
0,RO/P
0, RW
0, RW
0, RW
1, RW
1, RW
1, RW
1, RW
0,RO
P R E L I M I N A R Y
Next Page Indication:
0=No next page available
1=Next page available
The NetPHY-1 device does not support the next page function. This bit is
permanently set to 0
Acknowledge:
1=Link partner ability data reception acknowledged.
0=Not acknowledged.
The NetPHY-1 device'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 does not support flow control ability.
100BASE-T4 Support:
1=100BASE-T4 supported by the local device.
0=100BASE-T4 not supported.
The NetPHY-1 device does not support 100BASE-T4 so this bit is
permanently set to 0.
100BASE-TX Full Duplex Support:
1=100BASE-TX Full Duplex supported by the local device.
0=100BASE-TX Full Duplex not supported.
100BASE-TX Support:
1=100BASE-TX supported by the local device.
0=100BASE-TX not supported.
10BASE-T Full Duplex Support:
1=10BASE-T Full Duplex supported by the local device.
0=10BASE-T Full Duplex not supported.
10BASE-T Support:
1=10BASE-T supported by the local device.
0=10BASE-T not supported.
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.
Am79C873
Description