General Description

About TMC2074

The TMC2074 network controller is CircLink technology’s flagship product. The TMC2074’s flexibility and rich feature set enable a high-reliability and high-performance, real-time and control-oriented network without the cumbersome middle layer protocol stacks and complex packet prioritization schemes typically required.

TMC2074 operates at network data transfer rates up to 5 Mbps. Its embedded 1 kByte RAM can be configured into a maximum of 32 pages to implement a 31-node network where each node in the network has the same local memory.

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

• 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