Emerson / Motorola MVME147-022 33MHz, 8MB Single Board Computer

The Emerson/Motorola MVME147-022 is a single-height 6U VMEbus Single Board Computer built around the Motorola MC68030 microprocessor running at 33 MHz. This 32-bit processor incorporates on-chip L1 cache (256 B instruction, 256 B data), an integrated Memory Management Unit for virtual memory and software protection, and optional MC68882 floating-point co-processor support. The board features 8 MB of parity-supported DRAM, 4 KB of on-board SRAM, MK48T02 non-volatile RAM with battery-backed clock, and four 32-pin EPROM sockets supporting up to 1 MB × 8 capacity organized as two banks.

Technical Specifications Processor & Memory

MC68030 enhanced 32-bit microprocessor at 33 MHz

On-chip L1 cache: 256 B instruction + 256 B data

Integrated Memory Management Unit (MMU)

8 MB DRAM with parity support

4 KB × 8 SRAM

MK48T02 non-volatile RAM with battery backup

Up to 1 MB × 8 EPROM capacity Interfaces & Connectivity

VMEbus A32/D32 master/slave with system controller function (ANSI/VITA 1-1994 VME64, IEEE STD 1014)

Four EIA-232-D serial ports via Zilog 8530 serial controller

10 Mb Ethernet (AMD AM7990 Lance MAC with Intel LXT901 SIA)

Narrow SE SCSI bus controller (WD33C93B) with DMA

Centronics-compatible parallel printer port (8-bit bidirectional)

Two 16-bit timers and watchdog timer Physical & Environmental

Single-height 6U VME board

Dimensions: 233.4 mm H × 160.0 mm D × 19.8 mm W

Operating temperature: 0°C to +55°C (forced air cooling)

Key Features

Integrated VMEchip ASIC for VME interface reduces backplane congestion

On-board peripheral controllers eliminate need for additional VMEbus modules

Programmable Channel Controller (PCC) ASIC manages I/O interfaces

General Control Chip (GCC) ASIC handles core board functions

Time-of-day clock with battery backup

Typical Applications Real-time industrial control, embedded multitasking systems, data acquisition platforms, process automation, and legacy VME-based instrumentation requiring 32-bit processing capability.

Compatibility & Integration Full VMEbus compliance enables integration into existing VME backplane architectures. Serial, Ethernet, and SCSI interfaces provide direct connectivity to peripherals and network infrastructure. Optional MC68882 floating-point co-processor enhances numerical computation in demanding applications.