RTL8201N
Datasheet
6.6. Device Configuration Interface
Table 6. Device Configuration Interface
Description
53, 54, 56, PHYAddress.
Name
Type
Pin No.
CONFIG[4:0]
I
57, 58
Set the PHY address for the device.
CONFIG[5] LI/O
CONFIG[6] LI/O
47
Repeater mode.
Set high to put the RTL8201N into repeater mode. This pincan be directlyconnected
to GND or VCC.
46
37
35
MII/SNI interface.
This pin is latched to input during a power on or reset condition. Pull high to set
the RTL8201N into SNI mode operation. Set low for MII mode. Thispin canbe
directly connected to GND or VCC.
CONFIG[7]
LI
Auto-negotiation mode.
This pin is latched to input during a power on or reset condition. Set high to enable
Auto-negotiation mode, set low to force mode. Thispin canbe directlyconnected to
GND or VCC.
CONFIG[8] LI/O
Fiber/UTP Enable.
During power on reset, this pin status is latched to determine the media mode to
operate in.
1: Fiber mode
0: UTP mode
An internal weak pull low resistor sets this to the default of UTP mode. It is possible to
use an external 5.1KΩ pull high resistor to enable fiber mode.
CONFIG[9]
ISOLATE
LI
I
33
52
Speed mode.
This pin is latched to input during a power on or reset condition. Set high to put
the RTL8201N into 100Mbps operation. This pin can be directly connected to GND or
VCC.
Set high to isolate the RTL8201N from the MAC. This will also isolate the MDC/MDIO
management interface. In this mode, the power consumption is minimal. This pin can be
directly connected to GND or VCC.
DUPLEX
LDPS
LI
I
51
44
This pin is latched to input during a power on or reset condition. Set high to enable
full duplex. This pin can be directly connected to GND or VCC.
Set high to put the RTL8201N into LDPS mode. Thispin can bedirectly connected to
GND or VCC (see 8.6 Power Down, Link Down, Power Saving, and Isolation
Modes, page 21, for more information).
6.7. LED Interface
Table 7. LED Interface/PHY Address Configuration
Name
Type Pin No. Description
LED_LINK10
LED_LINK100
LED_DUPLEX
LED_RX
O
O
O
O
O
50
48
43
40
39
10Mbps link indicator.
100Mbps link indicator.
Duplex LED.
Receive LED.
LED_TX
Transmit LED.
Single-Chip/Port 10/100 Fast Ethernet PHYceiver
With Auto MDIX
8
Rev. 1.2
ETC [ ETC ]
