80220/80221
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
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