The Emerson/Motorola MVME147-023 is a 6U VMEbus single-board computer built around the Motorola MC68030 enhanced 32-bit microprocessor running at 33 MHz. The board integrates 16 MB of parity-protected DRAM, an MC68882 floating-point coprocessor operating at 33.33 MHz, and comprehensive on-board I/O including four serial ports, 10 Mb Ethernet, narrow SE SCSI mass storage interface, and one 8-bit parallel port. The MC68030’s on-chip instruction and data cache delivers 20–40% efficiency gains, while the integrated Memory Management Unit (MMU) enables virtual memory and software protection. The VMEchip ASIC provides full VME64 (IEEE STD 1014) compliance via the P1 connector. A 4K × 8 SRAM with battery-backed time-of-day clock and MK48T02 non-volatile RAM support persistent timekeeping. Four ROM/PROM/EPROM/EEPROM sockets accommodate firmware and boot code. The Programmable Channel Controller (PCC) and General Control Chip (GCC) ASICs manage peripheral integration and reduce VMEbus slot occupation. On-board debugger and diagnostic firmware simplify development and system verification. This architecture is ideal for industrial control, data acquisition, and embedded applications demanding integrated I/O without external transition modules.
## Technical Specifications
• **Processor:** Motorola MC68030, 33 MHz; on-chip instruction and data cache (20–40% efficiency improvement); complete Memory Management Unit (MMU)
• **Coprocessor:** Motorola MC68882 floating-point coprocessor, 33.33 MHz
• **Memory:** 16 MB DRAM with parity; 4K × 8 SRAM; MK48T02 non-volatile RAM and clock with battery backup; four 28/32-pin ROM/PROM/EPROM/EEPROM sockets
• **VMEbus Interface:** VME64 (ANSI/VITA 1-1994, IEEE STD 1014); VME6000 controller; VMEchip ASIC; 6U single-height form factor; P1 connector
• **Serial Communications:** Four EIA-232-D ports (85C30 controller)
• **Ethernet:** 10 Mb MAC controller (AMD AM7990 Lance); Intel LXT901 Ethernet Serial Interface Adapter
• **SCSI:** WD33C93 narrow SE controller; high-level command packet interface firmware
• **Parallel Port:** One 8-bit bidirectional interface (Programmable Channel Controller)
## Key Features
• On-chip cache eliminates frequent memory fetches for instruction and data streams
• MMU supports virtual memory and protected software execution
• Four serial ports cover synchronous and asynchronous communication requirements
• Integrated Ethernet and SCSI reduce external module dependency
• Battery-backed clock maintains real-time data across power cycles
• On-board firmware debugger and diagnostics accelerate development
## Typical Applications
Industrial process control, embedded data logging, real-time instrumentation, and VMEbus-based test systems requiring integrated networking and mass storage without additional backplane modules.
## Compatibility & Integration
Full VME64 compliance ensures interoperability with standard VMEbus backplanes. Optional MVME712M transition module provides DB-15 Ethernet, SCSI, and Centronics connectors for external connectivity.
