AM79C978VCSLASHW datasheet(192/261 Pages) AMD

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192

Am79C978

TBR4: 10BASE-T Auto-Negotiation Advertisement

This register contains the advertised ability of the

Am79C978 home networking device. The purpose of

this register is to advertise the technology ability to the

link partner device. See Table 69.

When this register is modified, Restart Auto -

Negotiation (Register 0, bit 9) must be enabled to guar-

antee the change is implemented.

Table 69.

TBR4: 10BASE-T Auto-Negotiation Advertisement Register (Register 4)

Bit(s)

Name

Description

Read/

Write

H/W or Soft

Reset

When set, the device wishes to engage in next page exchange. If

clear, the device does not wish to engage in next page exchange.

R/W

Reserved

Remote Fault

When set, a remote fault bit is inserted into the base link code

word during the Auto Negotiation process. When cleared, the

base link code work will have the bit position for remote fault as

cleared.

R/W

12:11

Reserved

PAUSE

This bit should be set if the PAUSE capability is to be advertised.

R/W

Reserved

Full-Duplex -

100BASE-TX

This bit advertises Full-Duplex capability. When set, Full-Duplex

capability is advertised. When cleared, Full-Duplex capability is

not advertised.

R/W

Half-Duplex -

100BASE-TX

This bit advertises Half-Duplex capability for the Auto-negotiation

process. Setting this bit advertises Half-Duplex capability.

Clearing this bit does not advertise Half-Duplex capability.

R/W

Full-Duplex -

10BASE-T

This bit advertises Full-Duplex capability. When set, Full-Duplex

capability is advertised. When cleared, Full-Duplex capability is

not advertised.

R/W

Half-Duplex -

10BASE-T

This bit advertises Half-Duplex capability for the Auto-negotiation

process. Setting this bit advertises Half-Duplex capability.

Clearing this bit does not advertise Half-Duplex capability.

R/W

4:0

Selector Field

The Am79C978 home networking device is an 802.3 compliant

device

0x01

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