AM79C901AVIT datasheet(47/90 Pages) AMD

47 / 90 page

Am79C901A

PR ELI M IN AR Y

HPR4: HomePNA PHY Auto-Negotiation Advertisement Register (Register 4)

This register contains the advertised ability of the

Am79C901A device. The purpose of this register is to

advertise the technology ability to the link partner de-

vice. When this register is modified, Restart Auto-Ne-

gotiation (Register 0, bit 9) must be enabled to

guarantee the change is implemented.

Table 21.

HPR4: HomePNA PHY Auto-Negotiation Advertisement Register (Register 4)

Bits

Name

Description

Read/Write

Default

Value

(hex)

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

cleared, the device does not wish to engage in next page

exchange.

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.

12:11

Reserved

PAUSE

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

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.

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.

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.

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.

4:0

Selector Field

The Am79C901A device is an IEEE 802.3 compliant device.

R01

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