The Emerson/Motorola MVME147SB-1 is a single-height 6U VME single board computer engineered for industrial embedded systems. Built around the Motorola 68030 microprocessor running at 25 MHz, it integrates 16 MB of DRAM, floating-point coprocessor support, and comprehensive I/O connectivity including Ethernet, SCSI, and four serial channels. The module operates as both VMEbus slave and master, supporting A32/D32 and A24/D16 addressing modes on 32-bit backplanes.
## Technical Specifications
**Processor & Memory**
• CPU: Motorola 68030 at 25 MHz
• Floating-Point Coprocessor: Intel MC68882
• System DRAM: 16 MB
• CMOS RAM: 2 KB with battery backup
• ROM/EPROM: Four 32-pin sockets supporting 1M × 8 EPROMs (16 bits wide)
**Controllers & Interfaces**
• Ethernet: AMD AM7990 Lance 10 Mb with Intel LXT901 SIA
• SCSI: WD33C93B narrow SE bus controller with DMA
• Serial: Eight 8530-based asynchronous RS-232C channels (four channels)
• Parallel: 8-bit bidirectional Centronics interface via PCC ASIC
• VME Bus Controller: MVME6000AC with VMEchip ASIC interface
• Real-Time Clock & NV RAM: MK48T02
• General Control: ASIC-based GCC for on-board functions
**Physical**
• Form Factor: Single-height 6U VME module, double-high configuration
• Weight: 1.10 lbs
## Key Features
• VMEbus A32/D32 and A24/D16 compatible with interrupter and system controller capability
• 10 Mb Ethernet port with unique station address
• SCSI interface for mass storage connectivity
• Four asynchronous serial channels and parallel printer port
• Dual P1/P2 connector architecture for VME and external I/O
• 32-bit VMEbus design for optimal power distribution
## Typical Applications
Industrial control systems, process monitoring, data acquisition, embedded telecommunications, and mission-critical instrumentation requiring deterministic processing and multi-protocol I/O.
## Compatibility & Integration
Designed for 32-bit VMEbus systems with forward and backward compatibility across VME, VME64, and VME64x standards. Supports OpenBSD/mvme68k, NetBSD/mvme68k, and Motorola System V/68 (Releases 3-8). Optimal operation requires both P1 and P2 backplane connections for power distribution.
