RTL8201E(L)
Datasheet
6.5. 10Mbps/100Mbps Network Interface
Table 5. 10Mbps/100Mbps Network Interface
Name
Type
Pin No.
(48-Pin)
Pin No. Description
(32-Pin)
MDI+[0]
MDI-[0]
O
1
2
3
4
Transmit Output.
Differential transmit output pair shared by 100Base-TX, 100Base-
FX, and 10Base-T modes. When configured as 100Base-TX, output
is an MLT-3 encoded waveform. When configured as 100Base-FX,
the output is pseudo-ECL level.
RSET
I
I
46
1
Transmit Bias Resistor Connection.
This pin should be pulled to GND by a 2.49KΩ (1%) resistor to
define driving current for the transmit DAC. The resistance value
may be changed, depending on experimental results of the
RTL8201E(L).
MDI+[1]
MDI-[1]
4
5
5
6
Receive Input.
Differential receive input pair shared by 100Base-TX, 100Base-FX,
and 10Base-T modes.
6.6. Device Configuration Interface
Table 6. Device Configuration Interface
Type Pin No. Pin No. Description
(48-Pin) (32-Pin)
Name
RXDV
LI/O
/PD
13
8
RMII/MII Interface
This pin’s status is latched at power on reset to determine at which
interface mode to operate:
0: MII mode
1: RMII mode
An internal weakly pulled low resistor sets this to the default MII
mode. It is possible to use an external 4.7KΩ pulled high resistor to
enable RMII mode.
Note: Only the RTL8201E(L)-VB supports RMII mode.
LED0/PHYAD[0]
LED1/PHYAD[1]
LI/O
/HZ
34
35
24
25
PHY Address. Sets the PHY address for the device.
CRS/RPTR/
CRS_DV
LI/O
/PD
36
26
Repeater Mode.
Set high to put the RTL8201E(L) into repeater mode. This pin can be
directly connected to GND or VCC.
COL/SNI
LI/O
/PD
38
27
MII/RMII/SNI Interface.
This pin is latched to input at a power on or reset condition. Pull high
to set the RTL8201E(L) into SNI mode operation. Set low for
MII/RMII mode. This pin can be directly connected to GND or VCC.
Note: Only the RTL8201E(L)-VB supports RMII mode.
RXER/FXEN
LI/O
/PD
39
28
Fiber/UTP Interface.
This pin’s status is latched at power on reset to determine the media
mode to operate in.
1: Fiber mode
0: UTP mode
An internal weakly pulled low resistor sets this to the default of UTP
mode. It is possible to use an external 4.7KΩ pulled high resistor to
enable fiber mode.
Single-Chip/Port 10/100 Fast Ethernet PHYceiver
with Auto MDIX
9
Track ID: JATR-1076-21 Rev. 1.3
REALTEK [ Realtek Semiconductor Corp. ]
