AC207-DS04-405-R datasheet(27/60 Pages) BOARDCOM

27 / 60 page

Preliminary Data Sheet

AC207

07/08/02

B roa dcom

Document

AC207-DS04-405-R

Page 17

Section 3 : R egis ter De scr iptions

The following standard registers are supported. (Register numbers are in Decimal format, the values are in Hex format).

NOTE: When writing to registers, it is recommended that a read/modify/write operation be performed, as unintended bits

may get set to unwanted states. This applies to all registers, including those with reserved bits.

AC207 register sets are listed below. Each register contains 16-bit data. The addresses shown below are hexadecimal.

Table 14: Register Set

PHY Addr

Offset Addr

Definition

Type

Default

0 – 4

PHY Port Status registers

––

PHY port link status

–

PHY port polarity status

–

PHY port partition status for 100 Mb

–

Port partition status for 10 Mb

–

PHY port speed status

–

PHY port isolation status

–

Initial Device Configuration register

R/W

–

Bridge Configuration register

R/W

–

Device revision number

–

0 – 31

PHY 1 registers

––

PHY Control register

R/W

3000

PHY Status register

2849

PHY Identifier 1 register

0022

PHY Identifier 2 register

5541

Auto-Negotiation Advertisement register

00A1

Auto-Negotiation Link Partner Ability register

0001

Auto-Negotiation Expansion register

0004

Auto Negotiation Next Page Transmit register

2001

8 – 15

Reserved

–

0000

PHY 10BASE-T Control register

R/W

–

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