AL2100-DS00-R datasheet(11/52 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

Page 3

VCC

2.5V supply.

PHYAD0/ LED_TP_SD

PHYAD0 (reset read Input): pull high or low to set the PHY address bit 0

for serial management function.

LED_TP_SD (output): indicates energy is detected on the twisted-pair

input. The active level is the invert of the reset read value.

LED0

Pull this pin high.

LED0 (output): low active. The default behavior blinks when the twisted-

pair port detects receive activity.

LED1

Pull this pin high.

LED1 (output): low active. The default behavior is ON when the twisted-

pair port in link-up condition.

DUPLEX/LED2

DUPLEX (reset read Input): sets the duplex capability for twisted-pair port

auto-negotiation function.

LED2 (output): the active value is the invert of the DUPLEX input level.

The default behavior blinks when the fiber port detects receive activity.

ANEN/LED3

ANEN (reset read input): auto-negotiation enable for the twisted pair port.

LED3 (output): the active value is the invert of the ANEN input level.

The default behavior is on when the link-up condition is detected on the

fiber port, and blinks when the remote fault condition is detected on the

fiber port.

PDOWN

PDOWN (low active input): pull low to put both TP and fiber ports into

power-down mode. This is a regular input, not a reset read signal.

VCC

2.5V supply.

RXN

Receive – for TP port in MDI mode.

Transmit – for TP port in MDIX mode.

RXP

Receive + for TP port in MDI mode.

Transmit + for TP port in MDIX mode.

SD_A/FXEN_A

SD_A/FXEN_A: (multithreshold input): pull low to disable the FX function

on the twisted pair (TP) port. PECL input level to enable the FX function

of the TP port. PECL high level to indicate the signal detect from the

connected fiber module.

GND

Ground.

GND

Ground.

RBIAD

Bias resister connection. Connect to a 10K 1% resister to GND

VCCPLL

VCC for Analog Bias, PLL modules.

GND

Ground for transmit circuit.

TXN

Transmit – in MDI mode.

Receive – in MDIX mode.

TXP

Transmit + in MDI mode.

Receive + in MDIX mode.

VCC

2.5V supply.

GND

Ground

GND

Ground

XO (Output): crystal output.

XI (Input): crystal input.

XI and XO pins are designed to connect to a 25 MHz, 50-PPM crystal.

When using an oscillator, connect the XI pin to the oscillator, and leave

the XO pin unconnected.

VCC

2.5V supply.

RST

Reset input is active low.

Table 1: Pin Descriptions

Name

Number

Type

Description

AL2100-DS00-R Datasheet(PDF) 11 Page - Broadcom Corporation.

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