LAN91C94
PRELIMINARY
ISA/PCMCIA
Single-Chip Ethernet Controller with RAM
FEATURES
• ISA/PCMCIA Single-Chip Ethernet
Controller
• 4608 Bytes of On-Chip RAM
• Supports IEEE 802.3 (ANSI 8802-3 )
Ethernet Standards
• Simultasking TM - Early Transmit and Early
Receive Functions
• Hardware Memory Management Unit
• Optional Configuration via Serial EEPROM
Interface ( Jumperless)
• Single +5V Power Supply
• Low Power CMOS Design
• 100 Pin QFP, TQFP and VTQFP Pac kage
Bus Interface
• Direct Interface to ISA and PCMCIA with No
Wait States
• Flexible Bus Interface
• 16-Bit Data and Control Paths
• Fast Access Time (40 ns)
• Pipelined Data Path
• Handles Block Word Transfers for Any
Alignment
• High Performance Chained ("Back-to-
Back") Transmit and Receive
• Pin Compatible with LAN91C92 (in ISA
mode)
• Flat Memory Structure for Low CPU
Overhead
• Dynamic Memory Allocation Between
Transmit and Receive
• Buffered Architecture, Insensitive to Bus
Latencies (No Overruns/ Underruns)
• Supports Boot PROM for Diskless ISA
Applications
Network Interface
• Integrates 10BASE-T Transceiver
Functions:
- Driver and Receiver
- Link Integrity Test
- Receive Polarit y Detection and
Correction
• Integrates AUI Interface
• Implements 10 Mbps Manchester
Encoding/Decoding and Clock Recovery
• Automatic Retransmission, Bad Packet
Rejection, and Transmit Padding
• External and Internal Loopback Modes
• Four Direct Driven LEDs for Status/
Diagnostics
Software Drivers
• Uses Certified LAN9000 Drivers Which
Operate with Every Major Network
Operating System
• Software Driver Compatible with LAN91C92
and LAN91C100 (100 Mbps) Controllers in
ISA Mode
• Softwa re Driver Utilizes Full Capability of 32
Bit Microprocessor
Simultasking is a trademark and SMSC is a registered trademark of Standard Microsystems Corporation