RTL8139C datasheet(26/62 Pages) ETC

Part #	RTL8139C

Description	REALTEK 3.3V SINGLE CHIP FAST ETHERNET CONTROLLER WITH POWER MANAGEMENT

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RTL8139C(L)

2002/01/10

Rev.1.4

26

6.18 Basic Mode Control Register

(Offset 0062h-0063h, R/W)

Bit

Name

Description/Usage

Default/

Attribute

15

Reset

This bit sets the status and control registers of the PHY(register

0062-0074H) in a default state. This bit is self-clearing. 1 = software

reset; 0 = normal operation.

0, RW

14

-

Reserved

-

13

Spd_Set

This bit sets the network speed. 1 = 100Mbps; 0 = 10Mbps. This bit‘s

initial value comes from 93C46 (93C56).

0, RW

12

Auto Negotiation

Enable

(ANE)

This bit enables/disables the NWay auto-negotiation function. Set to

1 to enable auto-negotiation, bit13 will be ignored.

Set to 0 disables auto-negotiation, bit13 and bit8 will determine the

link speed and the data transfer mode, respectively. This bit‘s initial

value comes from 93C46 (93C56).

0, RW

11-10

-

Reserved

-

9

Restart Auto

Negotiation

This bit allows the NWay auto-negotiation function to be reset.

1 = re-start auto-negotiation; 0 = normal operation.

0, RW

8

Duplex Mode

This bit sets the duplex mode. 1 = full-duplex; 0 = normal operation.

This bit‘s initial value comes from 93C46 (93C56).

If bit12 = 1, read = status write = register value.

If bit12 = 0, read = write = register value.

0, RW

7-0

-

Reserved

-

6.19 Basic Mode Status Register

(Offset 0064h-0065h, R)

Bit

Name

Description/Usage

Default/ Attribute

15

100Base-T4

1 = enable 100Base-T4 support; 0 = suppress 100Base-T4 support.

0, RO

14

100Base_TX_ FD 1 = enable 100Base-TX full duplex support;

0 = suppress 100Base-TX full duplex support.

1, RO

13

100BASE_TX_H

D

1 = enable 100Base-TX half-duplex support;

0 = suppress 100Base-TX half-duplex support.

1, RO

12

10Base_T_FD

1 = enable 10Base-T full duplex support;

0 = suppress 10Base-T full duplex support.

1, RO

11

10_Base_T_HD

1 = enable 10Base-T half-duplex support;

0 = suppress 10Base-T half-duplex support.

1, RO

10-6

-

Reserved

-

5

Auto Negotiation

Complete

1 = auto-negotiation process completed;

0 = auto-negotiation process not completed.

0, RO

4

Remote Fault

1 = remote fault condition detected (cleared on read);

0 = no remote fault condition detected.

0, RO

3

Auto Negotiation 1 = Link had not been experienced fail state.

0 = Link had been experienced fail state

1, RD

2

Link Status

1 = valid link established;

0 = no valid link established.

0, RO

1

Jabber Detect

1 = jabber condition detected; 0 = no jabber condition detected.

0, RO

0

Extended

Capability

1 = extended register capability;

0 = basic register capability only.

1, RO

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