AC208-DS04-405-R datasheet(26/58 Pages) BOARDCOM

26 / 58 page

AC208

Preliminary Data Sheet

07/08/02

B roa dcom

Page 18 Register Descriptions

Document

AC208-DS04-405-R

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).

The following table lists the AC208 register sets. Each register contains 16-bit data. The addresses in the following table are

hexadecimal.

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.

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

PHY 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 Configuration Register Control Register

R/W

PHY Interrupt Control/Status Register

Diagnostic Register

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