High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Table 5.34 Register 0 - Basic Control
ADDRESS
NAME
Reset
DESCRIPTION
MODE
DEFAULT
0.15
1 = software reset. Bit is self-clearing. For best results,
when setting this bit do not set other bits in this
register.
RW/
SC
0
0.14
0.13
Loopback
1 = loopback mode,
0 = normal operation
RW
RW
0
Speed Select
1 = 100Mbps,
Set by
MODE[2:0]
bus
0 = 10Mbps.
Ignored if Auto Negotiation is enabled (0.12 = 1).
0.12
Auto-
1 = enable auto-negotiate process
(overrides 0.13 and 0.8)
RW
Set by
MODE[2:0]
bus
Negotiation
Enable
0 = disable auto-negotiate process
0.11
0.10
Power Down
1 = General power down mode,
0 = normal operation
RW
RW
0
Isolate
1 = electrical isolation of PHY from MII
0 = normal operation
Set by
MODE[2:0]
bus
0.9
0.8
Restart Auto-
Negotiate
1 = restart auto-negotiate process
RW/
SC
0
0 = normal operation. Bit is self-clearing.
Duplex Mode
1 = Full duplex,
RW
Set by
MODE[2:0]
bus
0 = Half duplex.
Ignored if Auto Negotiation is enabled (0.12 = 1).
0.7
Collision Test
Reserved
1 = enable COL test,
0 = disable COL test
RW
RO
0
0.6:0
0
Table 5.35 Register 1 - Basic Status
DESCRIPTION
ADDRESS
NAME
MODE
DEFAULT
1.15
100Base-T4
1 = T4 able,
RO
0
0 = no T4 ability
1.14
1.13
1.12
1.11
100Base-TX Full
Duplex
1 = TX with full duplex,
RO
RO
RO
RO
1
1
1
1
0 = no TX full duplex ability
100Base-TX Half
Duplex
1 = TX with half duplex,
0 = no TX half duplex ability
10Base-T Full
Duplex
1 = 10Mbps with full duplex
0 = no 10Mbps with full duplex ability
10Base-T Half
Duplex
1 = 10Mbps with half duplex
0 = no 10Mbps with half duplex ability
1.10:6
1.5
Reserved
Auto-Negotiate
Complete
1 = auto-negotiate process completed
RO
0
0
0 = auto-negotiate process not completed
1.4
Remote Fault
1 = remote fault condition detected
0 = no remote fault
RO/
LH
Rev. 0.6 (12-12-03)
SMSC LAN83C185
DATA3S0HEET
SMSC [ SMSC CORPORATION ]
