AC104X-DS00-R datasheet(31/50 Pages) BOARDCOM

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Preliminary Data Sheet

■ AC104X

12/11/01

B roa dcom Co rpo rat ion

Document

AC104X-DS00-405-R

Section 3: Register Descriptions

Page 23

Table 22:

Bit

Name

Description

Mode

Default

18.15

Lp_Inbk

Link pulse loopback.

1 = Loopback the link pulse for auto-negotiation testing.

18.14

Send_nlp

1 = Force link pulse generator to send nlp even in auto-

negotiation mode.

18.13

Force Link Pass bt

1 = Force 10BASE-T link pass.

18.12

Force Link Pass tx

1 = Force 100BASE-TX link pass.

18.11

DPLX

This bit indicates the result of the auto-negotiation for duplex

arbitration.

18.10

Speed

This bit indicates the result of the auto-negotiation for data

speed arbitration.

18.9

RX_PASS

In 10BASE-T mode, this bit indicates the Manchester data

has been detected.

In 100BASE-T mode, it indicates valid signal has been

received but not necessarily locked on to.

18.8

RX_LOCK

Indicates the receive PLL has locked onto the received signal

for the selected speed of operation (10BASE-T or 100BASE-

TX). This bit is set whenever a cycle-slip occurs, and will

remain set until it is read.

18.[7:4]

ARB_STATE

HIGHEST

Highest state of Auto-Negotiation state machine since reset

on last read operation.

0000

18.[3:0]

ARB_STATE

LOWEST

Lowest state of Auto-Negotiation state machine since reset

on last read operation.

1111

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