Motorola MVME2700-4261

Motorola MVME2700-4261

Product Introduction
The Motorola MVME2700-4261 is the flagship model of the MVME2700 series, factory-equipped with up to 256MB of ECC DRAM. It provides unparalleled computing and storage capabilities for extremely complex applications requiring massive memory space, making it the ideal core for large-scale VME systems.

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Description

Motorola MVME2700-4261

Technical Specifications

  • Core CPU: 32-bit PowerPC 750 microprocessor.
  • System Memory: 256MB ECC DRAM.
  • Cache: 32KB L1 plus 1MB Backside L2 Cache.
  • Non-Volatile Storage: 8MB onboard Flash plus 1MB socketed Flash.
  • Bus Interface: 64-bit PCI local bus with A32/D32/D64 VME interface.

Functional Features

  • Maximum Memory Capacity: 256MB of RAM fulfills the demands of large real-time databases, complex control logic, and advanced user interfaces.
  • Multiprocessing Support: Hardware-level multiprocessing features, including Location Monitors and semaphore registers, facilitate multi-board coordination.
  • Broad OS Support: Firmware supports VxWorks, pSOS, LynxOS, and CHRP/PREP operating system booting.
  • Powerful I/O Throughput: Combined with massive memory and DMA engines, it easily handles high-frequency data acquisition tasks.

Application Scenarios

  • Large-Scale DCS: Acts as the central coordinator for plant-wide distributed control systems.
  • Scientific Instruments: Performs massive real-time data acquisition and preprocessing in particle accelerators or telescopes.
  • Aerospace Simulation: Calculates complex aerodynamic models and generates visuals for full-motion flight simulators.

Performance Parameters

  • Addressing Capability: Supports full 32-bit addressing and 32/64-bit data widths.
  • Timers: Four 32-bit programmable timers and one dedicated watchdog timer.
  • Environmental Tolerance: Storage temperature range of -40°C to +85°C, adapting to extreme warehousing and transit conditions.

Material Composition
Features carefully selected high-reliability semiconductor components, gold-plated PCBs to ensure soldering reliability for high-density BGA packages, and a long-life lithium backup battery.

Structural Characteristics

  • Board Form Factor: Standard 6U double-high VME module.
  • Memory Layout: Utilizes a RAM200 mezzanine array design to maximize board space utilization.
  • Panel Interfaces: Supports keyboard, mouse, floppy drive, and front-panel LED diagnostic interfaces.

Working Principle
The PowerPC 750 processor prioritizes reading data from the 1MB L2 cache and 256MB ECC DRAM during instruction execution. The Falcon memory controller executes dual-interleaved access to maximize memory bandwidth, while the PCI bridge handles requests from the VMEbus for high-speed local-to-external data exchange.

Installation Requirements

  • Power Margin: Due to the 256MB memory and high-performance CPU, ensure the VME power supply has ample current headroom on the +5V rail.
  • Firmware Configuration: On first use, verify correct memory capacity recognition via PPCBug and configure the correct system base address.
  • Physical Inspection: Before installation, check that the RAM200 modules are securely locked onto the base board.

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