MVME147SA‑1

6U VME Single‑Board Computer

Motorola / Emerson / Curtiss‑Wright

User Manual (Plain Text, No Images)

Key Identification:

MVME147SA‑1 = 25 MHz, 8 MB DRAM with parity, A32/D32 VME64, onboard Ethernet, SCSI, four serial ports

It is a higher‑performance variant in the MVME147S family, different from the older 20 MHz MVME‑147A.

1. General Description

2. Features

Processor and Memory

• Processor: MC68030 at 25 MHz, integrated MMU, 256‑byte unified cache

• Floating‑point coprocessor: MC68882 at 25 MHz, IEEE 754 compliant

• DRAM: 8 MB shared memory, parity enabled (standard for SA‑1)

• Battery‑backed SRAM: 4 KB for non‑volatile data storage

• Real‑time clock: MK48T02 time‑of‑day clock with battery backup

• ROM sockets: four 32‑pin sockets, 16‑bit wide, up to 4 MB total

Onboard I/O Interfaces

• Serial ports: four EIA‑232‑D asynchronous/synchronous ports (Z8530 SCC)

• Parallel port: Centronics‑compatible printer port

• SCSI interface: WD33C93 asynchronous SCSI with DMA capability

• Ethernet: Lance AM7990 10 Mbps AUI interface (onboard, no transition module required)

VMEbus Interface

• Addressing modes: A16, A24, A32

• Data widths: D08, D16, D32

• Bus operation: master, slave, system controller

• Compliance: VMEbus Rev C, VME64 compatible

System Functions

• Timers: two 16‑bit programmable tick timers

• Watchdog: hardware watchdog timer with reset capability

• Front panel LEDs: SCON, RUN, FAIL, STATUS

• Switches: RESET, ABORT

3. Electrical Specifications

• Power supply: +5 VDC, ±12 VDC (VMEbus standard)

• Current consumption: +5 V at 6.5 A typical, 7.5 A maximum

• +12 V: 1.0 A maximum (100 mA without LAN)

• -12 V: 100 mA maximum

• Logic levels: 5 V TTL compatible

• Power dissipation: approximately 15 W typical

4. Mechanical Specifications

• Form factor: 6U VME

• Dimensions: 233.4 mm height × 160 mm depth

• Weight: approximately 850 g

• Conformal coating: Class 2 (standard for industrial use)

5. Environmental Specifications

• Operating temperature: 0 °C to +55 °C

• Storage temperature: −20 °C to +70 °C

• Relative humidity: 5% to 95% non‑condensing

• Shock: 30 g, 11 ms pulse

• Vibration: 5 g, 5 Hz to 200 Hz

6. Supported Operating Systems

• VxWorks (all legacy versions supporting 68k architecture)

• Motorola VERSAdos

• NetBSD/mvme68k

• Custom embedded real‑time operating systems

• Bare‑metal application programs

7. Compatibility Notes

• MVME147SA‑1 is pin‑compatible with other MVME147S series boards (MVME147S‑1, MVME147SA‑2)

• It is software‑compatible with MVME‑147 and MVME‑147A but offers higher clock speed, parity memory, and VME64 support

• Not compatible with MVME147‑02x series (33 MHz, different PCB and logic)