RTL8153
Datasheet
5.4. Transceiver Interface Pins
Symbol
MDIP0
MDIN0
MDIP1
MDIN1
MDIP2
MDIN2
MDIP3
MDIN3
Type
IO
IO
IO
IO
IO
IO
IO
IO
Pin No
2
3
5
6
7
8
10
11
Table 4. Transceiver Interface Pins
Description
In MDI mode, this is the first pair in 1000Base-T, i.e., the BI_DA+/- pair, and is
the transmit pair in 10Base-T and 100Base-TX.
In MDI crossover mode, this pair acts as the BI_DB+/- pair, and is the receive pair
in 10Base-T and 100Base-TX.
In MDI mode, this is the second pair in 1000Base-T, i.e., the BI_DB+/- pair, and is
the receive pair in 10Base-T and 100Base-TX.
In MDI crossover mode, this pair acts as the BI_DA+/- pair, and is the transmit
pair in 10Base-T and 100Base-TX.
In MDI mode, this is the third pair in 1000Base-T, i.e., the BI_DC+/- pair.
In MDI crossover mode, this pair acts as the BI_DD+/- pair.
In MDI mode, this is the fourth pair in 1000Base-T, i.e., the BI_DD+/- pair.
In MDI crossover mode, this pair acts as the BI_DC+/- pair.
5.5. Clock Pins
Table 5. Clock Pins
Symbol
Type Pin No Description
CKXTAL1
I
44 Input of 25MHz Clock Reference.
CKXTAL2
IO
45
Output of 25MHz Clock Reference.
Input of 25MHz or 48MHz External Clock Source.
Power-Up Strapping Pin.
XTALDET
I
37 Power-on latch high voltage: 25MHz clock source
Power-on latch low voltage: 48MHz clock source
Note: When a 25MHz clock is used the XTALDET pin must be pulled high by a resistor during power-up. When a 48MHz
clock is used the XTALDET pin must be pulled low by a resistor during power-up.
5.6. Regulator and Reference Pins
Symbol
REGOUT
ENSWREG
VDDREG
AVDD33
Type
O
I
P
P
DVDD10_UPS P
RSET
I
Table 6. Regulator and Reference Pins
Pin No Description
36 Switching Regulator 1.2V Output.
33
3.3V: Enable switching regulator
0V: Disable switching regulator, and enable external 1.2V input mode
34, 35 Digital 3.3V Power Supply for Switching/LDO Regulator.
Linear Regulator (LDO) 3.3V Output.
25 Note: The embedded LDO is designed for RTL8153 internal use only. Do not
provide this power source to other devices.
Linear Regulator (LDO) 1.2V Output.
27 Note: The embedded LDO is designed for RTL8153 internal use only. Do not
provide this power source to other devices.
47 Reference (External Resistor Reference).
Integrated 10/100/1000M Ethernet Controller for USB Applications
6
Track ID: JATR-8275-15 Rev. 1.1