High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 5.34 Register 0 - Basic Control
ADDRESS
0.15
NAME
Reset
DESCRIPTION
1 = software reset. Bit is self-clearing. For best results,
when setting this bit do not set other bits in this
register.
1 = loopback mode,
0 = normal operation
1 = 100Mbps,
0 = 10Mbps.
Ignored if Auto Negotiation is enabled (0.12 = 1).
1 = enable auto-negotiate process
(overrides 0.13 and 0.8)
0 = disable auto-negotiate process
1 = General power down mode,
0 = normal operation
1 = electrical isolation of PHY from MII
0 = normal operation
1 = restart auto-negotiate process
0 = normal operation. Bit is self-clearing.
1 = Full duplex,
0 = Half duplex.
Ignored if Auto Negotiation is enabled (0.12 = 1).
1 = enable COL test,
0 = disable COL test
MODE
RW/
SC
RW
RW
DEFAULT
0
0.14
0.13
Loopback
Speed Select
0
Set by
MODE[2:0]
bus
Set by
MODE[2:0]
bus
0
Set by
MODE[2:0]
bus
0
Set by
MODE[2:0]
bus
0
0
0.12
Auto-
Negotiation
Enable
Power Down
Isolate
RW
0.11
0.10
RW
RW
0.9
0.8
Restart Auto-
Negotiate
Duplex Mode
RW/
SC
RW
0.7
0.6:0
Collision Test
Reserved
RW
RO
Table 5.35 Register 1 - Basic Status
ADDRESS
1.15
1.14
1.13
1.12
1.11
1.10:6
1.5
1.4
NAME
100Base-T4
100Base-TX Full
Duplex
100Base-TX Half
Duplex
10Base-T Full
Duplex
10Base-T Half
Duplex
Reserved
Auto-Negotiate
Complete
Remote Fault
1 = auto-negotiate process completed
0 = auto-negotiate process not completed
1 = remote fault condition detected
0 = no remote fault
RO
RO/
LH
0
0
1 = T4 able,
0 = no T4 ability
1 = TX with full duplex,
0 = no TX full duplex ability
1 = TX with half duplex,
0 = no TX half duplex ability
1 = 10Mbps with full duplex
0 = no 10Mbps with full duplex ability
1 = 10Mbps with half duplex
0 = no 10Mbps with half duplex ability
DESCRIPTION
MODE
RO
RO
RO
RO
RO
DEFAULT
0
1
1
1
1
Rev. 0.6 (12-12-03)
DATASHEET
30
SMSC LAN83C185
SMSC [ SMSC CORPORATION ]
