RTL8029AS Ver la hoja de datos (PDF) - Unspecified

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RTL8029AS

Realtek PCI Full-Duplex Ethernet Controller with built-in SRAM

Unspecified 

RTL8029AS Preliminary

[56]

[55]

40-47

[EEDI]

[EEDO]

MD7-0

O

9346 serial data input

I

9346 serial data output

I/O Boot ROM data bus

4.5. Medium Interface Pins

No.

82, 81

Name

CD+,CD-

Type

I

84, 83

RX+,RX-

I

77, 76

TX+,TX-

O

87, 86

73, 74

TPIN+,TPIN-

I

TPOUT+,TPOUT-

O

78

X1

I

79

X2

O

Description

This AUI collision input pair carries the differential

collision input signal from the MAU.

This AUI receive input pair carries the differential receive

input signal from the MAU.

This AUI transmit output pair contains differential line

drivers which send Manchester encoded data to the MAU.

These outputs are source followers and require 270 ohm

pull-down resistors to GND.

This TP input pair receives the 10 Mbits/s differential

Manchester encoded data from the twisted-pair wire.

This pair carries the differential TP transmit output. The

output Manchester encoded signals have been pre-distorted

to prevent overcharge on the twisted-pair media and thus

reduce jitters.

20Mhz crystal or external oscillator input.

Crystal feedback output. This output is used in crystal

connection only. It must be left open when X1 is driven with

an external oscillator.

4.6. LED Output Pins

No.

Name

71

LED_BNC

70

69, 68

LED0

LED1,LED2

Type

O

O

O

Description

This pin goes high when RTL8029AS's medium type is set

to 10Base2 mode or auto-detect mode with link test failure.

Otherwise, this pin is low. This pin can be used to control

the power of the DC converter for CX MAU and connected

to an LED to indicate the used medium type.

When LEDS0 bit (in CONFIG3 register of RTL8029AS

Page3) is 0, this pin acts as LED_COL. When LEDS0=1, it

acts as LED_LINK.

When LEDS1 bit (in CONFIG3 register of RTL8029AS

Page3) is 0, these 2 pins act as LED_RX & LED_TX

respectively. When LEDS1=1, these pins act as LED_CRS

& MCSB. Please refer to section 6.5 for details of the

lightening behavior of all LEDs.

LS009.0

9

1997.01.16

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