RTL8208 Просмотр технического описания (PDF) - Realtek Semiconductor
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RTL8208 Datasheet PDF : 40 Pages
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RTL8208
5. Pin Description
In order to reduce pin count, and therefore size and cost, some pins have multiple functions. In those cases, the functions are
separated with a “/” symbol. Refer to the Pin Assignment diagram for a graphical representation.
'I' stands for input
'O' stands for output
'A' stands for analog signal
'D' stands for digital signal
'P' stands for power
'G' stands for ground
'Pu' stand for internal pull up (75K ohm)
'Pd' stand for internal pull down (75K ohm)
5.1 Media Connection Pins
Pin Name
RXIP[7:0]
RXIN[7:0]
TXOP[7:0]
TXON[7:0]
Pin
44,35,30,21,16,
7,2,121
45,34,31,20,17,
6,3,120
42,37,28,23,14,
9,128,123
41,38,27,24,
13,10,127,124
Type
AI
AI
AO
AO
Description
Receiver Input: Differential positive signal shared by 100Base-TX,
100Base-FX, 10Base-T.
Receiver Input: Differential negative signal shared by 100Base-TX,
100Base-FX, 10Base-T.
Transmitter Output: Differential positive signal shared by
100Base-TX, 100Base-FX, 10Base-T.
Transmitter Output: Differential negative signal shared by
100Base-TX, 100Base-FX, 10Base-T.
5.2 Power and Ground Pins
Pin Name
VDDAH
VDDAH
VDDAL
VSSA
VDD
VSS
Pin
117
11,12,25,26,39,
40,125,126
119,4,5,18,19,
32,33,46
122,1,8,15,22,
29,36,43
57,71,79,89,
103
58,72,82,90,
104,111
Type
P
P
P
G
P
G
Description
Power for IBREF
3.3V Power to analog: Used for transmitters and equalizers.
2.5V Power to analog: Used for PLL circuits.
Analog ground
Digital 2.5V power supply
Digital ground
2003/04/04
6
Rev.1.97
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