Datasheet > 80220/80221

80220/80221

更新时间： 2024-09-08 23:25:19

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80220/80221 100Base-TX/10Base-T (PHY) manual 7/98

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80220/80221 数据手册

80220/80221

100BASE-TX/10BASE-T Ethernet

Media Interface Adapter

98184

Note: Check for latest Data Sheet revision

before starting any designs.

Features

■ SingleChip100Base-TX/10Base-TPhysical Layer

Solution

SEEQ Data Sheets are now on the Web, at

www.lsilogic.com.

■ Dual Speed - 100/10 Mbps

This document is an LSI Logic document. Any

reference to SEEQ Technology should be

considered LSI Logic.

■ Half And Full Duplex

■ MII Interface To Ethernet Controller

■ MI Interface For Configuration & Status

■ Optional Repeater Interface

Description

■ AutoNegotiation: 10/100, Full/Half Duplex

The 80220/80221 are highly integrated analog interface

IC's for twisted pair Ethernet applications. The 80220/

80221 can be configured for either 100 Mbps (100Base-

TX) or 10 Mbps (10Base-T) Ethernet operation. The

80220 is packaged in a 44L package, while the 80221 is

packaged in a 64L package and contains a few more

features.

■ Meets All Applicable IEEE 802.3, 10Base-T,

100Base-TX Standards

■ On Chip Wave Shaping - No External Filters

Required

■ Adaptive Equalizer

■ Baseline Wander Correction

The 80220/80221 consist of 4B5B/Manchester encoder/

decoder, scrambler/descrambler, 100Base-TX/10Base-T

twisted pair transmitter with wave shaping and output

driver, 100Base-TX/10Base-T twisted pair receiver with

on chip equalizer and baseline wander correction, clock

and data recovery, AutoNegotiation, controller interface

(MII), and serial port (MI).

■ Interface to External 100Base-T4 PHY

■ LED Outputs

- Link

- Activity

- Collision

- Full Duplex

- 10/100

- User Programmable

The addition of internal output waveshaping circuitry and

on-chip filters eliminates the need for external filters nor-

mallyrequiredin100Base-TX and10Base-Tapplications.

■ Many User Features And Options

■ Few External Components

The 80220/80221 can automatically configure itself for

100 or 10 Mbps and Full or Half Duplex operation with the

on-chip AutoNegotiation algorithm.

■ Pin configuration

- 44L PLCC - 80220

- 64L LQFP - 80221

The80220/80221canaccesseleven16-bitregistersthough

theManagementInterface(MI)serialport.Theseregisters

contain configuration inputs, status outputs, and device

capabilities.

The 80220/80221 are ideal as media interfaces for

100Base-TX/10Base-T adapter cards, motherboards, re-

peaters, switching hubs, and external PHY's.

4-11

MD400159/E

12 3 4 5 6 7...91

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