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 high-performance 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 mission-critical 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.
