Description

Product Overview: MOTOROLA MVME162-031 Embedded Computer Board

The MOTOROLA MVME162-031 is a high-performance, single-board computer (SBC) designed for the VMEbus (Versa Module Eurocard) architecture. As a specific configuration within the renowned MVME162 series, this model is engineered for critical embedded applications demanding high reliability, robust I/O capabilities, and real-time processing power in harsh industrial, military, and telecommunications environments.

The -031 suffix denotes a specific factory configuration, typically indicating a variant with a MC68040 processor and a particular mix of onboard memory and I/O, making it a powerful intelligent controller for complex systems.

Key Features & Benefits

High-Performance 68K-Series Processor:

At its core, the board is built around a Motorola MC68040 microprocessor. This is a 32-bit CISC CPU with an integrated floating-point unit (FPU) and memory management unit (MMU), delivering substantial processing power for complex control algorithms and real-time computing tasks.

VMEbus System Interface:

Complies with the VME64 standard, providing a high-bandwidth (40 MB/s), 32-bit parallel bus architecture. This allows the board to act as a master or system controller, interfacing with other VME boards for I/O expansion, data acquisition, and communication.

Comprehensive Onboard Memory:

Features a specific amount of DRAM (likely 4MB or 8MB, as standard for the -031 config) soldered onto the board for reliability.
Includes 512 KB of battery-backable SRAM (using a BR-2032 battery), providing non-volatile storage for critical data, boot code, or real-time operating system kernels.

Extensive & Ruggedized I/O Connectivity:

SCSI Interface: Integrates a NCR 53C710 controller for high-speed (Fast SCSI) communication with storage devices and peripherals.
Serial Channels: RS-232/422/485 compatible ports for connecting terminals, modems, or other serial devices.
Parallel I/O: Provides flexible interfacing for custom digital control and sensing applications.
Counter/Timers: Essential for timing, event counting, and waveform generation.

Mezzanine Site (P2 Connector):

Features a site for a PCI Mezzanine Card (PMC) or Motorola’s proprietary IP Module. This allows for significant functional expansion such as additional Ethernet ports, fiber optic communication, or specialized digital I/O, tailoring the board to specific application needs.

Designed for Harsh Environments:

Constructed with industrial-grade components and designed for reliable operation in environments with extended temperature ranges, shock, and vibration.
MVME162-031

Technical Specifications (Representative for -031 Config)

Parameter	Specification
Microprocessor	Motorola MC68040 (25 MHz or 33 MHz)
FPU/MMU	Integrated
DRAM	Onboard, soldered (e.g., 4MB or 8MB)
SRAM	512 KB (battery-backable)
VMEbus Interface	VME64 System Controller
SCSI Controller	NCR 53C710, Dual-Channel Fast SCSI
Serial I/O	2x RS-232/422/485 ports (MC68681 DUART)
Parallel I/O	24 lines
Counter/Timers	3x (AM9513A)
Expansion	PMC or IP Module Mezzanine Site
Form Factor	6U VME (233mm x 160mm)

Typical Applications

The MVME162-031 was designed for embedded applications where longevity and reliability are paramount. Typical use cases include:

Industrial Automation & Process Control: Acting as a powerful PLC or machine controller in manufacturing systems.
Military & Aerospace Systems: Ruggedized computing for vehicle management, radar, and communications equipment.
Telecommunications: Base station control and network switching.
Transportation Systems: Railway and traffic control systems.
Medical Imaging: Controlling diagnostic equipment.

Legacy Status & Important Notes

End-of-Life Product: The MOTOROLA MVME162 series, including the -031 model, is a legacy product that has been officially discontinued for many years. It is typically sourced from the secondary market or remaining stock.
Historical Context: This board was a flagship product in the 1990s and early 2000s for VME systems. Motorola’s semiconductor and embedded computing divisions later became Freescale Semiconductor, which was subsequently acquired by NXP Semiconductors.
Considerations for Use: Potential users must consider the availability of replacement boards, compatible software (e.g., VxWorks, LynxOS, pSOS), and technical support, which is now largely community-driven or provided by specialized refurbishment companies.
Configuration Code: The -031is a Motorola factory configuration code specifying a particular set of features (CPU type/speed, memory size, etc.). For exact specifications, the official hardware manual for this specific code is essential.

Why Consider This Board?

For maintaining and servicing existing legacy systems, the MVME162-031 remains a critical component. Its robust design, proven architecture, and extensive I/O made it a workhorse of its era. For new designs, modern Single Board Computers (SBCs) with advanced architectures (e.g., ARM, x86) are strongly recommended.

Disclaimer: This description is based on historical technical data sheets for the MVME162 series. The exact specifications for a specific MVME162-031 unit must be verified against its official Motorola/Freescale data sheet and hardware manual. This product is obsolete and not recommended for new design-ins.

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