84220
84220
Quad 100BaseTX/100BaseFX/10BaseT
Physical Layer Device
99036
Features
Note: Check for latest Data Sheet revision before
starting any designs.
s Single Chip 100BaseTX/100BaseFX/10BaseT
Physical Layer Solution
SEEQ Data Sheets are now on the Web, at
www.lsilogic.com
s Four Independent Channels in One IC
s 3.3V Power Supply with 5V Tolerant I/O
This document is an LSI Logic document. Any
reference to SEEQ Technology should be considered LSI Logic.
s Dual Speed - 10/100 Mbps
s Half and Full Duplex
s MII Interface or Reduced Pin Count MII (RMII)
Interface to Ethernet Controller
Description
s MI Interface for Configuration and Status
The 84220 is a highly integrated Ethernet Transceiver for
twisted pair and fiber Ethernet applications. The 84220
can be configured for either 100 Mbps (100BaseFX or
100BaseTX) or 10 Mbps (10BaseT) Ethernet operation.
s Optional Repeater Interface
s AutoNegotiation for 10/100, Full/Half Duplex
s Meets all Applicable IEEE 802.3, 10BaseT,
100BaseTX and 100BaseFX Standards
The 84220 consists of four (4) separate and independent
channels. Each channel consists of: 4B5B/Manchester
encoder, scrambler, transmitter with wave shaping and onchip filters, transmit output driver, receiver with adaptive
equalizer, filters, baseline wander correction, clock and
data recovery, descrambler, 4B5B/Manchester decoder,
and controller interface (MII or RMII).
s On Chip Wave Shaping - No External Filters
Required
s Adaptive Equalizer for 100BaseTX
s Baseline Wander Correction
s LED Outputs
Link
Activity
Collision
Full Duplex
Far End Fault (for FX)
10/100
The addition of internal output waveshaping circuitry and
on-chip filters eliminates the need for external filters
normally required in 100BaseTX and 10BaseT
applications.
The 84220 can automatically configure itself for 100 or 10
Mbps and Full or Half Duplex operation, for each channel
independently, using the on-chip AutoNegotiation
algorithm.
s160L PQFP
The 84220 can access eleven 16-bit registers for each
channel through the Management Interface (MI) serial
port. These registers comply to Clause 22 of IEEE 802.3u
and contain configuration inputs, status outputs, and
device capabilities.
The 84220 is ideal as a media interface for 100BaseTX/
100BaseFX/10BaseT switching hubs, repeaters, routers,
bridges, and other multi port applications.
The 84220 is implemented in a low power CMOS
technology and operates with a 3.3V power supply.
1
MD400177/B
