Motorola MVME 172-333 Embedded Controller

Technical Dossier

Product Details And Specifications

Motorola MVME 172 Series: Comprehensive Module Range and Technical Overview

The Motorola MVME 172 series is a family of VMEbus-based single-board embedded controllers that achieved widespread deployment across global heavy industry sectors, including petrochemical refineries, nuclear power generation facilities, offshore oil platforms, and continuous-process chemical plants. Built on the Motorola 68040 processor architecture, the MVME 172 established itself as a high-reliability compute node within VME-based Distributed Control Systems (DCS) and SCADA backplanes throughout the 1990s and into the 2000s. Its combination of onboard DRAM, Flash memory, dual serial ports, and a real-time operating environment made it a standard selection for OEM integrators building safety-critical and process-critical control infrastructure. Installed base estimates place the MVME 172 family in tens of thousands of active control cabinets worldwide, many of which remain in service under long-term maintenance contracts.

The Evolution of MVME 172 Architecture

The MVME 172 series succeeded the earlier MVME 167 and MVME 162 families, inheriting the VME64 bus standard while upgrading the processor from the 68030 to the full 68040 at clock speeds ranging from 25 MHz to 40 MHz depending on variant. Early production units (circa 1993–1996) shipped with EPROM-based firmware and limited onboard Flash. Mid-cycle revisions introduced expanded DRAM configurations (up to 32 MB), enhanced SCSI-2 interfaces, and Ethernet (10BASE-T) via the IP (Industry Pack) mezzanine slot standard. Late-production variants incorporated revised PMC (PCI Mezzanine Card) compatibility layers to ease migration toward the subsequent MVME 5100 and MVME 6100 PowerPC-based platforms.

Compatibility considerations are significant for maintenance engineers: MVME 172 boards require VME64 backplanes and are not directly interchangeable with MVME 162 units without firmware and address-map reconfiguration. VxWorks BSP (Board Support Package) versions are revision-specific; substituting a -333 variant for a -323 or -343 requires BSP validation. Transition to modern replacements (MVME 5500, MVME 7100) involves OS migration from VxWorks 5.x to VxWorks 6.x or Linux, which constitutes a full engineering change order in most regulated facilities.

MVME 172 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified members of the Motorola MVME 172 product family, classified by functional configuration:

Embedded Controller Variants (68040 CPU Board)

MVME 172-333: 68040 @ 33 MHz, 4 MB Flash, 4 MB DRAM, dual RS-232, SCSI-2, Ethernet, single IP slot.
MVME 172-323: 68040 @ 32 MHz, 2 MB Flash, 4 MB DRAM, reduced I/O configuration, single IP slot.
MVME 172-343: 68040 @ 33 MHz, 4 MB Flash, 8 MB DRAM, dual IP slots, enhanced memory bus.
MVME 172-353: 68040 @ 33 MHz, 4 MB Flash, 16 MB DRAM, dual IP slots, extended DRAM configuration.
MVME 172-363: 68040 @ 33 MHz, 8 MB Flash, 16 MB DRAM, dual IP slots, high-density memory variant.
MVME 172-513: 68040 @ 25 MHz, 4 MB Flash, 4 MB DRAM, single IP slot, early-production clock variant.
MVME 172-523: 68040 @ 25 MHz, 4 MB Flash, 8 MB DRAM, single IP slot.
MVME 172-533: 68040 @ 25 MHz, 8 MB Flash, 16 MB DRAM, dual IP slots.
MVME 172-543: 68040 @ 25 MHz, 4 MB Flash, 32 MB DRAM, maximum DRAM configuration for 25 MHz class.
MVME 172-733: 68040 @ 40 MHz, 4 MB Flash, 4 MB DRAM, highest clock-speed variant, single IP slot.
MVME 172-743: 68040 @ 40 MHz, 4 MB Flash, 16 MB DRAM, dual IP slots, high-performance configuration.
MVME 172-753: 68040 @ 40 MHz, 8 MB Flash, 32 MB DRAM, dual IP slots, maximum performance configuration.
MVME 172-763: 68040 @ 40 MHz, 16 MB Flash, 32 MB DRAM, extended Flash for large firmware images.
MVME 172-013: Base configuration, no onboard Ethernet, single IP slot, OEM-stripped variant.
MVME 172-023: Base configuration with Ethernet, no SCSI, single IP slot, communications-focused OEM variant.
MVME 172-043: Dual IP slot, no Ethernet, SCSI-2 only, process I/O expansion configuration.

Sourcing Hard-to-Find & Obsolete MVME 172 Parts

Motorola formally discontinued the MVME 172 series as part of its embedded computing portfolio divestiture to Emerson Network Power (subsequently Artesyn Embedded Technologies, then Abaco Systems). No new production units have been manufactured since approximately 2008. The series is fully end-of-life (EOL) with no manufacturer support, no firmware updates, and no OEM spare parts availability through standard distribution channels.

DriveKNMS maintains a dedicated inventory program for MVME 172 lifecycle extension. Stock is sourced through controlled decommissioning of retired DCS systems, verified OEM surplus channels, and long-term storage partners. All units are catalogued by exact part number suffix to ensure configuration-accurate replacement. DriveKNMS can supply tested MVME 172 boards to facilities operating under extended maintenance agreements where a platform migration is not operationally feasible within the current budget cycle or outage window. Customers with multi-unit requirements or standing blanket orders are accommodated through reserved allocation agreements.

Quality Control for the MVME 172 Range

MVME 172 boards present specific test challenges due to their integrated VMEbus arbitration logic, onboard DRAM refresh circuits, and IP slot bus interface. DriveKNMS applies a structured test protocol to each unit prior to shipment. Power-on self-test (POST) completion and diagnostic LED sequence verification are performed first. DRAM is tested at full capacity using pattern-write/read cycles to detect cell degradation common in aged DRAM arrays. The SCSI-2 controller is exercised against a known-good target device. Ethernet (10BASE-T) transceiver function is verified via loopback. Each IP slot interface is tested with a compatible IP module to confirm bus arbitration and interrupt routing integrity. Serial port UART function is verified at standard baud rates. Units that fail any sub-test are quarantined, documented, and not offered for sale. Boards that pass full protocol are issued a DriveKNMS test certificate with date, technician ID, and test results summary.