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Description
Product Overview: MOTOROLA MVME2700-761 Single Board Computer
The MOTOROLA MVME2700-761 is a high-performance, ruggedized Single Board Computer (SBC) designed for the VMEbus (Versa Module Eurocard) architecture. Representing a more advanced generation than the earlier MC68040-based boards, the MVME2700 series leverages the powerful PowerPC architecture to deliver significantly greater processing power, memory capacity, and high-speed connectivity. The -761 variant is a specific configuration within this series, designed to serve as a central compute node in demanding real-time and embedded systems across military, aerospace, and industrial applications.
This board exemplifies the transition from older CISC architectures (like the 68K) to modern RISC-based processors (PowerPC) within the robust VME ecosystem.
Key Features & Benefits
High-Performance PowerPC Processor:
- At its core, the board features a Motorola MPC750 or MPC760 RISC microprocessor. This CPU offers a significant performance leap with its superscalar architecture, capable of executing multiple instructions per clock cycle. The -761suffix often indicates the use of the higher-performance MPC760 variant.
VMEbus System Interface:
- Functions as a VME64 System Controller, providing a high-bandwidth, 32/64-bit parallel bus architecture for master-slave communication with other VME boards. This ensures seamless integration into large, modular VME systems.
Advanced Memory Architecture:
- L2 Cache: Integrates a large secondary cache (typically 1MB) directly on the processor module, drastically reducing memory latency and improving overall system throughput.
- SDRAM Main Memory: Features a substantial amount of onboard Synchronous DRAM (e.g., 128MB or 256MB), soldered for reliability in high-vibration environments.
- Flash Memory: Includes onboard Flash memory for storing boot code, the operating system, and application firmware, eliminating the need for mechanical disks.
Extensive High-Speed I/O & Expansion:
- Dual Ethernet: Integrates two 10/100 Mbps Ethernet controllers (likely via a PCI-to-PCI bridge), providing critical network connectivity for system management and data transfer.
- PCI Mezzanine Card (PMC) Sites: Features two PMC expansion sites (typically on the front and rear), offering unparalleled flexibility. These sites allow for the addition of specialized I/O such as additional serial ports, fiber channel, SCSI, or custom interfaces, making the board adaptable to a vast array of applications.
- Serial & Parallel Ports: Includes standard RS-232 serial ports for console management and debugging.
Ruggedized Design:
- Built with industrial-grade components and designed to operate reliably in extended temperature ranges and under conditions of shock and vibration, making it suitable for deployment in harsh environments.
MVME2700-761
Technical Specifications (Representative)
| Parameter | Specification |
| Microprocessor | Motorola MPC750 or MPC760 PowerPC RISC Processor |
| CPU Speed | Likely 400 MHz to 1 GHz+ (depending on specific -761 config) |
| L2 Cache | 1MB (Integrated) |
| DRAM | Typically 128MB or 256MB SDRAM (onboard) |
| VMEbus Interface | VME64 System Controller |
| Ethernet | Dual 10/100Base-TX Interfaces |
| Expansion | Two PCI Mezzanine Card (PMC) Sites |
| Flash Memory | 8MB or 16MB (for boot and storage) |
| Serial I/O | Multiple RS-232/422/485 ports |
| Form Factor | 6U VME (233mm x 160mm) |
Typical Applications
The MVME2700-761 was designed for computationally intensive embedded applications requiring a reliable form factor and expansion capabilities. Its primary uses include:
- Military & Aerospace: Mission computers, radar/sonar signal processing, vehicle management systems, and communications control.
- Industrial Automation: High-speed real-time control systems, robotics, and complex machine control.
- Telecommunications: Network switching and routing equipment.
- Medical Imaging: Control and data processing for diagnostic machines like CT or MRI scanners.
- Scientific Research: Data acquisition and processing systems.
Legacy Status & Important Notes
- Mature Product Line: The MVME2700 series is a mature product line. While more modern than the MC68040-based boards, it is still considered a legacy product in the context of today’s technology. Motorola’s embedded computing division transitioned to Freescale Semiconductor, which was later acquired by NXP Semiconductors.
- Support Considerations: For existing deployments, this board remains a critical component. However, for new designs, more modern architectures (such as ARM or multi-core x86) in VPX or advanced CompactPCI form factors are strongly recommended due to better performance, power efficiency, and available support.
- Configuration Code: The -761suffix is a Motorola configuration code specifying a particular set of features (CPU type/speed, memory size, etc.). For exact specifications, the official hardware manual for that specific code is essential.
Why Consider This Board?
The MVME2700-761 represents a powerful, modular, and rugged computing solution for its era. Its key strengths lie in its powerful PowerPC processing, extensive expansion capabilities via PMC sites, and proven reliability in harsh environments. It is a cornerstone for maintaining and upgrading existing VME-based systems.
Disclaimer: This description is based on historical architectural data. The exact specifications for a specific MVME2700-761 unit must be verified against its official Motorola/Freescale data sheet and hardware manual. This product is not recommended for new design-ins.
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