LAN83C185_03 SMSC [SMSC Corporation], LAN83C185_03 Datasheet - Page 9

• Manufacturer Part Number: LAN83C185_03
• Description: High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver
• Manufacturer: SMSC [SMSC Corporation]

High Performance Single Chip Low Power 10/100 Ethernet Physical Layer Transceiver (PHY)
Datasheet
Chapter 1 General Description
SMSC LAN83C185
1.1
TXD[0..3]
RXD[0..3]
nRESET
RX_CLK
MODE0
TX_CLK
MODE1
MODE2
RX_DV
RX_ER
TX_EN
TX_ER
MDIO
MDC
CRS
COL
The SMSC LAN83C185 is a low-power, highly integrated analog interface IC for high-performance
embedded Ethernet applications. The LAN83C185 requires only a single +3.3V supply.
The LAN83C185 consists of an encoder/decoder, scrambler/descrambler, transmitter with wave-
shaping and output driver, twisted-pair receiver with on-chip adaptive equalizer and baseline wander
(BLW) correction, clock and data recovery, and Media Independent Interface (MII).
The LAN83C185 is fully compliant with IEEE 802.3/ 802.3u standards and supports both 802.3u-
compliant and vendor-specific register functions. It contains a full-duplex 10-BASET/100BASE-TX
transceiver and supports 10-Mbps (10BASE-T) operation on Category 3 and Category 5 unshielded
twisted-pair cable, and 100-Mbps (100BASE-TX) operation on Category 5 unshielded twisted-pair
cable.
Architectural Overview
MODE Control
SMI
100M Rx
10M Rx
Logic
Logic
Figure 1.1 LAN83C185 Architectural Overview
Management
Regulator
Control
1.8V
Receive Section
Data Recovery
DSP System:
Equalizer
10M PLL
Clock
DATASHEET
Negotiation
100M PLL
Auto-
1
Analog-to-
Squelch &
Digital
Filters
100M Tx
10M Tx
Logic
Logic
Transmit Section
Generator
Interrupt
Address
Latches
Central
PHY
Bias
Transmitter
Transmitter
100M
10M
GPO Circuitry
LED Circuitry
PLL
Rev. 0.6 (12-12-03)
nINT
RXP / RXN
PHYAD[0..4]
GPO0
GPO1
GPO2
TXP / TXN
XTAL1
XTAL2
SPEED100
LINKON
ACTIVITY
FDUPLEX