AL2100-DS00-R datasheet(24/52 Pages) BOARDCOM

24 / 52 page

AL2100

Preliminary Data Sheet

11/11/02

Broa d c om Co rp o r a ti o n

Page 16

100base-Tx PHY Registers

Document

AL2100-DS01-405-R

Se cti on 4: R e g i s t er D e sc r i pt ion s

The first seven registers of the MII register set are defined by the MII specification. In addition to these required registers are

several Altima Communications, Inc. specific registers. There are reserved registers and/or bits that are for Altima internal

use only. The following standard registers are supported.

Legend:

RW = Read and write access

SC = Self-clearing

LL = Latch low until cleared by reading

RO = Read-only

RC = Cleared on read

LH = Latch high until cleared by reading

100BASE-TX PHY REGISTERS

Note

When writing to registers, it is recommended that a read/modify/write operation be performed because

unintended bits can get set to unwanted states. This applies to all registers, including those with

reserved bits.

Table 5: Registers 0 through 31

Description

Default

Control Register

3000

Status Register

6049

PHY Identifier 1 Register

0022

PHY Identifier 2 Register

5521

Auto-Negotiation Advertisement Register

0181

Auto-Negotiation Link Partner Ability Register

41E1

Auto-Negotiation Expansion Register

0005

Next Page Advertisement Register

2801

8-15

Reserved

XXXX

Interrupt Level Control Register

1800

Interrupt Control/Status Register is reserved because there is no hardware support.

0000

18,19

Reserved

XXXX

Cable Measurement Capability Register

XXXX

Receive Error Counter Register

0000

22-31

Reserved

XXXX

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