RTL8100 Ver la hoja de datos (PDF) - Realtek Semiconductor

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RTL8100

SINGLE CHIP FAST ETHERNET CONTROLLER WITH POWER MANAGEMENT

Realtek Semiconductor 

RTL8100B(L)

4.6 Attachment Unit Interface

Symbol

TXD+

TXD-

RXIN+

RXIN-

X1

X2

Type

O

O

I

I

I

O

Pin No

72

71

68

67

61

60

Description

100/10BASE-T transmit (Tx) data.

100/10BASE-T receive (Rx) data.

25 MHz crystal/OSC. input.

Crystal Feedback Output: This output is used in crystal connection only.

It must be left open when X1 is driven with an external 25 MHz oscillator.

4.7 Test and Other Pins

Symbol

RTT3

RTSET

VCTRL

NC

Type

TEST

I/O

Analog

-

Pin No

63

65

55

7,35,40, 52,53,

54, 69, 76, 78

Description

Chip test pin

This pin must be pulled low by a resistor. Please refer to the application

circuit for the correct value.

Use this pin and an external PNP type transistor to generate +2.5V for

the RTL8100B(L).

Reserved

2001-11-9

9

Rev.1.41

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