AL2100-DS00-R datasheet(33/52 Pages) BOARDCOM

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Preliminary Data Sheet

AL2100

11/11/02

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

Document

AL2100-DS01-405-R

100base-Tx PHY Registers

Page 25

STATUS REGISTER

PHY IDENTIFIER 1 REGISTER

Table 23: Register 1: Status Register Bit Description

Bit

Name

Description

Mode

Default

100Base-T4

Permanently tied to 0 indicates no 100BaseT4 capability.

100Base-TX Full Duplex

1 = 100BaseTX full-duplex capable.

0 = Not 100BaseTX full-duplex capable.

100Base-TX Half Duplex

1 = 100BaseTX half-duplex capable.

0 = Not TX half-duplex capable.

10Base-T Full Duplex

1 = 10BaseT full-duplex capable.

0 = Not 10BaseT full-duplex capable.

10Base-T Half Duplex

1 = 10BaseT half-duplex capable.

0 = Not 10BaseT half-duplex capable.

10:7

Reserved

0000

MF Preamble Suppression

The PHY is able to perform management transaction without

MDIO preamble. The management interface needs a

minimum of 32 bits of preamble after reset.

ANEN Complete

1 = Auto-negotiation process completed. Registers 4, 5, 6 are

valid after this bit is set.

0 = Auto-negotiation process not complete.

Remote Fault

1 = Remote fault condition detected.

0 = No remote fault.

This bit remains set until it is cleared by reading Register 1.

RO/LH

ANEN Ability

1 = Able to perform auto-negotiation function; default value

determined by ANEN pin.

0 = Unable to perform auto-negotiation function.

Link Status

1 = Link is established. If link fails, this bit is cleared, and

remains at 0 until register is read again.

0 = Link has gone down.

RO/LL

Jabber Detect

1 = Jabber condition detect.

0 = No jabber condition detected.

RO/LH

Extended Capability

1 = Extended register capable. This bit is tied permanently to

Table 24: Register 2: PHY Identifier 1 Register Bit Description

Bit

Name

Description

Mode

Default

15:0

OUI*

Composed of the third through 18th bits of the

Organizationally Unique Identifier (OUI), respectively.

0022(H)

Note

Based on an OUI is 0010A9 (hex).

AL2100-DS00-R Datasheet(PDF) 33 Page - Broadcom Corporation.

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