W89C841F Datasheet, PDF (80/102 Pages) Winbond – 3-IN - 1 10/100M FAST ETHERNET CONTROLLER

W89C841F/D
Control (Register 0h)
BIT(S)
0.15
NAME
RST
0.14
LPBK
0.13
SPEED_LSB
0.12
ANEN
0.11
PDN
0.10
ISO
0.9
ANEN_
RST
0.8
DPLX
0.7
COLTST
0.6
0.5:0
SPEED_MSB
Reserved
DESCRIPTION
RESET
1 – PHY Reset
0 – Normal operation
Loop Back Enable
1 – Enable loopback mode
0 – Disable Loopback mode
Speed Selection LSB
0.13
0
0
10 Mbits/s
0
1
100 Mbits/s
1
0
1000 Mbits/s
1
1
Reserved
Auto Negotiation Enable
1 – Enable auto negotiation process
0 – Disable Auto negotiation process
Power Down Enable
1 – Power Down
0 – Normal Operation
Isolate AD2105 from Network
1 – Isolate PHY from MII/RMII
0 – Normal Operation
Restart Auto Negotiation
1 – Restart Auto Negotiation Process
0 – Normal Operation
Duplex Mode
1 – Full Duplex mode
0 – Half Duplex mode
Collision Test
1 – Enable COL signal test
0 – Disable COL signal test
Speed Selection MSB
Not Used
R/W
R/W
SC
DEFAULT
0h
R/W
0h
R/W
1h
R/W
1h
R/W
0h
R/W
0h
R/W
0h
SC
R/W
1h
R/W
0h
RO
0h
RO
00h
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