AM79C873 Advanced Micro Devices, AM79C873 Datasheet - Page 22

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

Basic Mode Status Register (BMSR) -
Register 1
22
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
Remote Fault
100BASE-T4
Suppression
Half Duplex
Half Duplex
Full Duplex
Full Duplex
Link Status
10BASE-T
10BASE-T
Bit Name
Reserved
Complete
Ability
0,RO/LL
Default
0,RO/P
1,RO/P
1,RO/P
1,RO/P
1,RO/P
1,RO/P
RO/LH
0,RO
0,RO
0,RO
0,
P R E L I M I N A R Y
100BASE-T4 Capable:
1=NetPHY-1 device is able to perform in 100BASE-T4 mode.
0=NetPHY-1 device is not able to perform in 100BASE-T4 mode.
100BASE-TX Full Duplex Capable:
1=NetPHY-1 device is able to perform 100BASE-TX in Full Duplex mode.
0=NetPHY-1 device is not able to perform 100BASE-TX in Full Duplex
mode.
100BASE-TX Half Duplex Capable:
1=NetPHY-1 device is able to perform 100BASE-TX in Half Duplex mode.
0=NetPHY-1 device is not able to perform 100BASE-TX in Half Duplex
mode.
10BASE-T Full Duplex Capable:
1=NetPHY-1 device is able to perform 10BASE-T in Full Duplex mode.
0=NetPHY-1 device is not able to perform 10BASE-T in Full Duplex mode.
10BASE-T Half Duplex Capable:
1=NetPHY-1 device is able to perform 10BASE-T in Half Duplex mode.
0=NetPHY-1 device is not able to perform 10BASE-T in Half Duplex mode.
Reserved:
Write as 0, ignore on read.
MII 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 NetPHY-1 device 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=NetPHY-1 device able to perform Auto-Negotiation.
0=NetPHY-1 device not able to perform Auto-Negotiation.
Link Status:
1=Valid link established (for either 10 Mbps or 100 Mbps operation).
0=Link 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.
Am79C873
Description