MVME 147-011 MOTOROLA

Product Core Brief

Model: MVME147-011
Brand: Motorola Computer Group (now NXP)
Series: MVME147 VMEbus Single Board Computers
Core Function: 25 MHz MC68030 VMEbus master/slave processor module
Product Type: VMEbus SBC with Ethernet SCSI serial I/O
Key Specs: 4 MB DRAM parity | 4 serial ports | Ethernet | SCSI | A32/D32 VME
Condition: ⚠️ Obsolete, limited stock

Product Introduction

MOTOROLA MVME147-011 is a 25 MHz MC68030-based VMEbus single board computer for real-time embedded control, providing Ethernet, SCSI, four serial ports, and 4 MB parity DRAM in double-height VME format. It functions as VME system controller or slave with A32/D32 data paths and on-board MVME147BUG debugger/monitor firmware.

The module connects local I/O to P2 user pins while sharing DRAM supports multiprocessor VME systems via four mailbox interrupts and read-modify-write cycles. Field engineers deploy it in legacy VME chassis for process control, telecom, and military where 68030 performance meets legacy VMEbus protocol requirements.

Frequently Asked Questions

Q: Does the MVME147-011 support hot-swapping in a live VMEbus chassis?
A: Honestly, VMEbus lacks standardized hot-swap and this board draws 5 A maximum at +5 V. Pulling a live SBC drops Ethernet, SCSI, and serial instantly plus risks backplane glitches. Power down the crate, confirm +5 V/+12 V/-12 V rails recover cleanly, verify no bus arbitration conflicts, and seat firmly before applying power.

Q: Is the MVME147-011 obsolete, and is there a direct replacement?
A: The entire MVME147 series counts as legacy 68030-era VME hardware with no drop-in Motorola successor. Modern paths lead to PowerPC or x86 VME SBCs but require VxWorks/RTOS porting, VMEbus driver rewrite, and I/O remapping. For exact replacement, source MVME147-011A if available and verify EPROM compatibility before last-time-buy decisions.

Q: Will I lose firmware or configuration when replacing the board?
A: The most common mistake is assuming EPROMs transfer cleanly. MVME147BUG lives in four socketed 32-pin EPROMs (≤200 ns access)—back up all four before removal using external programmer, document socket population, and verify checksums. Replacement board needs identical EPROM set, DRAM parity config match, and VMEbus jumper verification before first power-up.