RTL8019AS Ver la hoja de datos (PDF) - Realtek Semiconductor

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RTL8019AS

Realtek Full-Duplex Ethernet Controller with Plug and Play Function (RealPNP)

Realtek Semiconductor 

SPECIFICATION

RTL8019AS

CONFIG0: RTL8019AS Configuration Register 0 (03H; Type=R except Bit[7:6]=R/W)

Bit

Symbol

Description

7-6

VERID Version ID: These two bits are defined as below.

Bit7 Bit6 Type

Mode

1

1

R RTL8019

0

0

R RTL8019A

0

0

R/W RTL8019AS, these two bits are all "0"

when power on, but can be written in

RTL8019AS's config write enable mode

(EEM0=EEM1=1). Software uses these

differences to identify the chip.

5

AUI This bit is set when external MAU is used on AUI interface. Therefore it is set when in

10Base5 mode or the AUI input pin is high.

4

PNPJP This bit is set when PNP jumper pin is pulled high externally.

3

JP

This bit reflects the state of JP input. It, when set, indicates the RTL8019 is in jumper

mode.

2

BNC When set, this bit indicates that the RTL8019 is using the 10Base2 thin cable as its

networking medium. This bit will be set in the following 2 cases:

(1) PL1=PL0=0 (auto-detect) and link test fails

(2) PL1=PL0=1 (10 Base 2)

1-0

0

Always 0s.

The following table describes the behavior of bits and pins for cabling media.

Media Type

10Base5

10Base2

10BaseT

Link disabled

Auto detect

Link OK

Auto detect

Link fail

Auto detect

Link fail

AUI Input

x

x

x

x

L

H

Selected

Media

AUI

BNC

UTP

AUI Bit

1

0

0

BNC Bit

0

1

0

UTP

0

0

BNC

0

1

AUI

1

0

LEDBNC

Output

L

H

L

L

H

L

Original BNC bit in 8019

(For reference only)

0

1

0

0

1

1

8019AS.doc

18

2001-04-02

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