Emerson / Motorola MVME162-412 Embedded Controller

The Emerson/Motorola MVME162-412 is a VMEbus-based embedded controller for real-time industrial automation and control systems. This single-board computer delivers 32-bit processing with configurable processor options, integrated memory management, and DMA capabilities. The MVME162-412 operates as both VMEbus master and slave with system controller functionality, supporting A32/D64 data transfers and versatile serial communication interfaces for demanding embedded applications.

Technical Specifications Processor and Core Architecture

MC68LC040 or MC68040 microprocessor options at 25 MHz or 32 MHz

8 KB on-board cache with integrated Memory Management Unit (MMU)

Floating Point Unit (FPU) integrated on MC68040 variants

Single non-interleaved SRAM architecture Memory Configuration

4 MB shared DRAM with parity protection or ECC support

512 KB SRAM with battery backup

1 MB Flash memory for firmware storage

8K × 8 NVRAM and Time-of-Day (TOD) clock with battery backup (200-day worst-case retention)

One 32-pin PLCC EPROM socket VMEbus Interface

VMEchip2 ASIC controller with A32/D64 master/slave capability

System controller functionality

DMA support for D64 and local bus memory burst cycles

DMA transfers: D16/D32/D64/BLT (VMEbus to local bus); D8/D16/D32 (processor to VMEbus)

Four-level requester, seven-level interrupter, seven-level interrupt handler

Eight software-programmable hardware interrupts via VMEchip2 Serial Communication

Two serial ports: console (EIA-232-D DTE) and user-configurable (EIA-232-D or EIA-422 V.36)

Additional ports configurable as EIA-232-D

Key Features

Selectable processor performance: 25 MHz LC040 or 25/32 MHz 68040 variants

Integrated floating-point processing on 68040 models

Multiple I/O configuration options for serial communication

Battery-backed memory for persistent data retention

Expandable DRAM architecture on select variants

Typical Applications

Real-time control systems and process automation

Industrial data acquisition and monitoring

VMEbus-based distributed control architectures

Embedded systems requiring deterministic processing

Compatibility & Integration The MVME162-412 integrates directly into VMEbus backplanes supporting A32/D64 protocols. Serial ports support standard EIA-232-D and EIA-422 interfaces for host communication. On-board NVRAM and clock enable autonomous operation independent of external time sources.