Emerson / Motorola MVME101 VME System Controller Module

The Emerson/Motorola MVME101 is a VMEbus system controller module serving as a single-board computer for embedded real-time applications. Built on Motorola MC 680x0 architecture (M68000), It has essential system control functions including clock generation, interrupt handling, memory management, and bus arbitration. The module occupies a single VME slot and implements core VMEbus protocols with A32:D32 support, making it the foundational control element in VMEbus-based embedded systems.

Technical Specifications

Processor: Motorola M68000 architecture

Bus Interface: VMEbus (A32:D32)

Form Factor: Single-slot VME, 6U Euro-card

System Control Functions: Clock generation, seven-level interrupt handling with bus arbitration, memory management, bus arbitration

Parallel I/O: 16 bi-directional lines

Serial Ports: Two RS-232C channels via DB-25 connectors

Programmable Timers: Three 16-bit counter/timers (off-board accessible)

Status Display: Hexadecimal LED readout

VMEbus Arbiter: Single-level arbiter for Level 3 bus requests

Key Features

Configurable interrupt vector selection via jumper settings

Programmable ROM access timing with WAIT cycle control

Flexible memory socket configuration (U52–U56, U61–U64)

Selectable serial interface control logic

Integrated system clock and interrupt distribution across all seven VMEbus interrupt levels

Direct VMEbus backplane connectivity via standard J1/P1 and J2/P2 connectors

Typical Applications

VMEbus system controller and master arbitration

Real-time embedded control systems

Industrial automation and instrumentation platforms

Data acquisition and signal processing systems requiring VMEbus architecture

Compatibility & Integration The MVME101 operates as the system controller within VMEbus architecture, supporting VMEbus specification standards. It manages bus arbitration, interrupt distribution, and memory operations across the backplane, enabling modular expansion with compatible VME peripherals and I/O modules.