INTRODUCTION
The monolithic SmMMIT provides the system designer with an intelligent solution to MIL-STD-1553 multiplexed serial data bus design problems. The SmMMIT is a single-chip device that implements all three of the defined MIL-STD-1553 functions - Remote Terminal, Bus Controller, and Monitor. Operating either autonomously or with a tightly coupled host, the SmMMIT will solve a wide range of MIL-STD-1553 interface problems. A powerful RISC processing unit provides automatic message handling, message status, general status, and interrupt information. The register-based interface architecture provides many programmable functions as well as extensive information pertinent to device maintenance. In either of the three operating modes, the SmMMIT can access up to 64K x 16 of external memory (65,536 x 16). 

SmMMIT FEATURES
❐ Comprehensive MIL-STD-1553 dual redundant Bus
   Controller (BC), Remote Terminal (RT), and Monitor
   Terminal (MT)
❐ MIL-STD-1553B, Notice II RT
   - Internal command illegalization in the RT mode
   - 16-bit read/write time-tag with user-defined resolution
   - Subaddress data buffering
❐ Simultaneous RT/MT mode of operation
❐ Flexible BC architecture designed to off-load the host
   computer
   - Minor frame timing
   - Efficient command block flow statements
      (Branch, Go To, Call)
   - Status word polling
   - Programmable retries
❐ Programmable interrupt architecture with automatic
   interrupt logging available in all modes
❐ Autonomous operation in all three modes of operation
   - Ideal for low cost remote terminals
❐ Built-In Test capability
❐ Supports IEEE Standard 1149.1 (JTAG)
❐ Radiation-hardened option available
❐ Flexible packaging offering:
   - 84-pin pingrid array (PGA)(not available RadHard)
   - 84-lead flatpack
   - 132-lead flatpack (not available RadHard)
❐ Standard Microcircuit Drawing 5962-92118 available
   - QML Q & V compliant