The TMC2084 is CircLink's standalone mode controller acting as an intelligent remote I/O controller that uses the enhanced token passing protocol. TMC2084 I/O nodes are controlled by the Host node (TMC2074/72) via the network. Thus, TMC2084 enables a single-processor with multi-remote I/O controllers environment at reasonable cost.

The TMC2084 has thirty-two I/O port lines featuring programmable direction, with 8-bit basis (output: 16 to 32 bit; input: 0 to 16 bit). The maximum number of nodes per network is fifteen, including the host node. This configuration enables a processor to control a total of 448 (14 × 32) remote I/O lines. The Output Port type is selectable from either open-drain or push-pull, while one part of the I/O ports is definable as either output pins for network status monitoring, strobe output pins to handshake with AD or DA converter, or input pins for external trigger.

TMC2084 also has additional functions including the function to notify the host of its status, the states of its Output Ports and settings, the function to send packets with timestamp, and the function to synchronize the on-chip timer to the host.

This rich feature set is contained in a single 48-pin TQFP package.

Additional Features

Features
• Low Power CMOS, 3.3 Volt Power Supply with 5 Volt Tolerant I/O
• Enhanced Token Passing Protocol from ARCNET
• Maximum 15 node per network
• Token Retry Mechanism
• 64/128 Byte 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
• Standalone (I/O) Mode Operates without MCU
• Supports 16 Bit Input and 16 Bit Output
• Up to 14 Intelligent Remote I/O Ports:
• Programmable with 8-bit basis (16 to 32 outputs; 0 to 16 inputs)
• Selectable output type (push-pull or open-drain)
• The part of port is definable as strobe outputs and/or external trigger inputs
• The anti-chatter circuit on the input port can be set in ON/OFF
• The sampling frequency of the anti-chatter circuit can be set (19.1Hz/1.22KHz)
• Feature Rich Transmit Trigger
• After receiving OUTPUT DATA packet or expiring on-chip timer
• Continuous transmission
• External trigger input
• Flexible Transceiver Interface:
• RS-485 transceiver + twist pair cable
• RS-485 transceiver + pulse transformer + twist pair cable
• Hybrid transceiver (HYC4000 or HYC2000 from Microchip Japan)
• Fiber Optics also supported
• 48-Pin, TQFP RoHS Compliant Package
• Body size: 7 x 7mm; pitch: 0.5mm
• Temperature Range from 0 to 70 Degrees C