TMC2074
Dual Mode CircLink™
Controller
PRODUCT FEATURES
Low Power CMOS, 3.3 Volt Power Supply with 5
Volt Tolerant I/O
Supports 8/16-Bit Data Bus
− Both 86xx and 68hxx Platforms
1K On-chip Dual Port Buffer Memory
− Sequential I/O Mapped Access
Enhanced Token Passing Protocol from ARCNET
− Maximum 31 Nodes per Network
− Token Retry Mechanism
− Maximum 256 Bytes per Packet
− Consecutive Node ID Assignment
Memory Mirror
− Shared Memory within Network
Network Standard Time
− Network Time Synchronization
− Automatic Time Stamping
Coded Mark Inversion
− Intelligent 1-Bit Error Correction
− Magnetic Saturation Prevention
Dual Operation Modes
− Peripheral (Host) Mode Operates with MCU
− Standalone (I/O) Mode Operates without MCU
Datasheet
Supports 8 Bit Programmable General Purpose
I/O at peripheral Mode
Supports 16 Bit Input and 16 Bit Output at
Standalone Mode
Dual Communication Modes (with Peripheral
Mode)
− Free Format Mode
− Remote Buffer Mode
3 Port Hub Integrated
− 1 Internal and 2 External
Flexible Topologies
− Bus, Star and Tree
Low Cost Media can be Used
− RS485 Differential Driver
Fiber Optics and Twisted Pair Cable Supported
128-Pin VTQFP Package; Green, Lead-free
Package also Available
Temperature Range from 0 to 70 Degrees C
SMSC TMC2074
Page 1
DATASHEET
Revision 0.1 (03-29-06)