RTL8201N
Datasheet
8.2.2. UTP Mode and MII Interface
Table 24. UTP Mode and MII Interface
ANE
(Pin 37)
SPEED
(Pin 33)
DUPLEX Operation
(Pin 51)
Auto-negotiation enabled. The ability field does not support 100Mbps or full
duplex mode operation.
H
H
H
H
L
L
L
L
L
L
L
Auto-negotiation enabled. The ability field does not support 100Mbps
operation.
H
L
Auto-negotiation enabled. The ability field does not support full duplex mode
operation.
H
H
L
Default setup, auto-negotiation enabled. The RTL8201N supports 10Base-T
/100Base-TX, half/full duplex mode operation.
H
L
Auto-negotiation disabled. Forces the RTL8201N into 10Base-T and half
duplex mode.
Auto-negotiation disabled. Forces the RTL8201N into 10Base-T and full
duplex mode.
L
H
L
Auto-negotiation disabled. Forces the RTL8201N into 100Base-TX and half
duplex mode.
H
H
Auto-negotiation disabled. Forces the RTL8201N into 100Base-TX and full
duplex mode.
H
8.2.3. UTP Mode and SNI Interface
SNI interface to MAC (only operates in 10Base-T when the SNI interface is enabled)
Table 25. UTP Mode and SNI Interface
ANE
(Pin 37)
X
SPEED
(Pin 33)
X
DUPLEX
(Pin 51)
L
Operation
The duplex pin is pulled low to support the 10Base-T half duplex function.
10Base-T half duplex is the specified default mode in the SNI interface.
X
X
H
The RTL8201N also supports full duplex in SNI mode. The duplex pin is
pulled high to support 10Base-T full duplex function.
8.2.4. Fiber Mode and MII Interface
The RTL8201N only supports 100Base-FX when Fiber mode is enabled. ANE (Auto-Negotiation Enable)
and SPEED configuration is ignored when Fiber mode is enabled.
Table 26. Fiber Mode and MII Interface
ANE
(Pin 37)
X
SPEED
(Pin 33)
X
DUPLEX
(Pin 51)
Operation
H
L
The duplex pin is pulled high to support 100Base-FX full duplex function.
The duplex pin is pulled low to support 100Base-FX half duplex function.
X
X
Single-Chip/Port 10/100 Fast Ethernet PHYceiver
With Auto MDIX
19
Rev. 1.2
ETC [ ETC ]
