Emerson / Motorola MVME167-34 Single-Board Computer

The Emerson/Motorola MVME167-34 is a full-height, single-width 6U VMEbus single-board computer built on Motorola MC68040 CISC architecture. Operating at 33 MHz, the processor delivers 36.8 MIPS with integrated Memory Management Unit (MMU) and Floating-Point Unit (FPU). The board ships standard with 32 MB of ECC DRAM configured in four-way interleaving, plus 128 KB of SRAM and 8 KB of NVRAM with real-time clock/calendar. On-board ROM/EPROM capacity reaches 4 MB across four 44-pin sockets. VMEChip2 ASIC enables full 32-bit master/slave VMEbus control with DMA supporting D64 and local bus burst cycles. Integrated peripherals include Intel i82596CA 10Base-T Ethernet, NCR53C710 narrow SE SCSI controller with 32-bit DMA, four RS-232 serial ports (CD2401 quad processor), 8-bit bidirectional Centronics-compatible parallel port, four 32-bit timers, and watchdog timer. Purpose-built for industrial control, embedded systems, and VMEbus-based instrumentation requiring deterministic real-time performance.

Technical Specifications

Processor: Motorola MC68040 @ 33 MHz, 36.8 MIPS

Memory: 32 MB ECC DRAM (four-way interleaved); 128 KB SRAM; 8 KB NVRAM with RTC/calendar; 4 MB ROM/EPROM (four 44-pin sockets)

VMEbus: Full 32-bit master/slave interface via VMEChip2 ASIC; DMA controller supports VMEbus D64 and local bus burst

Ethernet: Intel i82596CA controller, 10Base-T with 32-bit DMA

SCSI: NCR53C710 narrow SE controller, 32-bit local bus burst DMA

Serial: Four EIA-232-D ports (CD2401 quad I/O processor)

Parallel: 8-bit bidirectional Centronics-compatible via PCC2 ASIC

Timers: Four 32-bit timers plus watchdog timer

Form Factor: 6U VMEbus module, full-height, single-width

Key Features

Integrated FPU and MMU eliminate external coprocessor requirements

Four-way memory interleaving maximizes DRAM throughput

ECC DRAM protects against single-bit errors in deployments

VMEChip2 ASIC reduces board complexity while improving reliability

Dual-ASIC architecture (VMEbus control + memory management) optimizes I/O performance

Typical Applications

Industrial control and real-time embedded systems

VMEbus-based test and measurement systems

Data acquisition and signal processing

Telecommunications and network infrastructure

Compatibility & Integration The MVME167-34 integrates into 6U VMEbus crates and supports standard VMEbus protocols for interoperability with third-party modules. Ethernet and SCSI interfaces enable direct connection to network infrastructure and mass storage. Four serial ports accommodate legacy and modern peripherals.