Description
1. Overview
The VMIC VMIVME-7740-850 (350-007740-850 L) is a 3U VME64x rugged single-board computer (SBC) developed by VMIC and GE Intelligent Platforms. Equipped with an 850 MHz Freescale MPC7448 PowerPC industrial processor and Tundra Universe II bus architecture, it delivers high real-time computing performance, low-latency bus scheduling and high-reliability continuous operation.
Complying with VME64x Rev.C standard, the board supports A32/D32 high-speed bus transmission and dual-port DRAM bus sharing. It is compatible with multiple industrial real-time operating systems, integrating programmable watchdog timer, industrial boot flash and non-volatile SRAM. With ultra-wide temperature resistance, vibration shock resistance and excellent EMC performance, it is widely applied in power energy, rail transit, military measurement and control, and legacy VME system upgrading and maintenance scenarios.
2. Technical Features
2.1 850MHz PowerPC High Real-Time Computing
Adopts Freescale MPC7448 industrial PowerPC processor with 850MHz fixed main frequency, optimized for embedded real-time control. It provides stronger real-time performance and higher operational stability than traditional Pentium architecture SBCs, efficiently supporting complex control logic operation, high-frequency data acquisition and multi-task parallel scheduling for high-precision industrial control scenarios.
2.2 Full VME64x Bus Compatibility
Fully compliant with VME64x Rev.C specification, supporting A32 high-address addressing, D32 32-bit high-speed data transmission and 4-level bus arbitration. The dual-port DRAM sharing architecture supports multi-processor collaborative operation, realizing seamless adaptation and plug-and-play replacement for legacy VME systems without rack and logic modification.
2.3 Dedicated Embedded Reliable Functions
Integrates programmable 16-bit timers, hardware watchdog, bootable industrial flash and non-volatile SRAM. It realizes automatic system boot, fault self-reset and power-down parameter protection, effectively avoiding system crash, data loss and program exception, improving independent operation reliability of embedded systems.
2.4 Multi-OS Native Adaptation
Natively compatible with mainstream real-time operating systems including VxWorks, QNX, LynxOS, Solaris and Linux, as well as Windows industrial systems. With complete driver ecology, it supports rapid program transplantation and system renovation, reducing project transformation costs.
2.5 Compact Rugged Industrial Design
Adopts 3U standard Eurocard compact structure with high integration. Passed strict temperature and humidity cycling, vibration shock and EMC tests, featuring ultra-wide temperature operation, vibration resistance, dust and moisture resistance, adapting to harsh continuous operating conditions such as field, vehicle-mounted and industrial cabinet environments.
2.6 Complete On-Board Peripherals
Integrates IDE CompactFlash storage expansion interface, industrial serial ports and debugging interfaces. It independently completes system operation, data storage, equipment communication and on-site debugging without additional expansion modules, simplifying system architecture and reducing fault points.
3. Detailed Specifications
3.1 Basic Hardware Parameters
- Model: VMIVME-7740-850
- Part No.: 350-007740-850 L
- Manufacturer: VMIC / GE Intelligent Platforms (Emerson)
- Type: 3U VME64x Rugged Industrial Single Board Computer
- CPU: Freescale MPC7448 PowerPC Industrial Processor
- CPU Frequency: 850MHz
- Bus Architecture: Tundra Universe II VME Bus Interface
- Bus Standard: VME64x Rev.C, A32/D32 Transmission, 4-Level Arbitration
- Core Functions: Main Control Computing, Real-Time Scheduling, Bus Data Processing, Fault Self-Diagnosis, Power-Down Data Protection
- OS Compatibility: VxWorks, QNX, LynxOS, Solaris, Linux, Windows
- Application Fields: Power Plant Control, Rail Transit, Military Measurement, Embedded Industrial Automation
3.2 Computing & Storage Parameters
- CPU Architecture: PowerPC Embedded Real-Time Optimization Architecture
- Operating Frequency: 850MHz Fixed Stable Frequency
- Memory: On-Board Industrial High-Speed DRAM, Dual-Port Bus Sharing
- Storage Expansion: Max 192MB IDE CompactFlash Solid-State Storage
- Power-Down Storage: Non-Volatile SRAM for Key Parameter Permanent Saving
- Boot Media: On-Board Industrial Boot Flash
- Timing Unit: 3× Programmable 16-Bit Industrial Timers
- Fault Tolerance: Independent Hardware Watchdog with Automatic Reset
3.3 Bus & Electrical Parameters
- Bus Transmission: A32 High Addressing, D32 32-Bit High-Speed Data Transmission
- Bus Arbitration: 4-Level Priority Scheduling for Multi-Device Parallel Operation
- Bus Feature: Dual-Port DRAM Sharing, Multi-Processor Collaborative Operation
- Power Supply: Standard VME Backplane DC Power Supply
- Protection: Industrial EMC Compatibility, Signal Filtering, Surge Suppression
- Operation Mode: VME Bus Master/Slave Adaptive Dual Mode
3.4 Mechanical & Installation Parameters
- Structure: Standard 3U VME Eurocard Form Factor
- Installation: Standard VME Rack Guide Rail Embedded Installation
- Craft: Industrial Three-Proof PCB, Wide-Temperature Component Screening
- Structural Feature: High Integration, Vibration & Loosening Resistance
3.5 Environmental Parameters
- Operating Temperature: -40℃ ～ +70℃
- Storage Temperature: -55℃ ～ +85℃
- Operating Humidity: 5%～95%RH (Non-Condensing, Non-Corrosive)
- Environmental Resistance: Vibration-Proof, Impact-Proof, Humidity-Proof, High EMI Resistance
- Working Condition: Industrial Cabinet, Vehicle-Mounted, Field & Military Harsh Environment
- Execution Standard: VME64x International Standard, GE Industrial Hardware Specification
4. Operating Principle
The VMIVME-7740-850 single-board computer operates based on PowerPC real-time computing, VME64x high-speed bus scheduling, hardware fault self-recovery and power-down data protection. After power-on, it completes full hardware self-check, chip initialization, bus protocol matching and system boot loading automatically to enter real-time main control state.
During operation, the 850MHz MPC7448 processor executes control logic, data acquisition and multi-task scheduling programs efficiently. The Tundra Universe II bus interface realizes high-speed data interaction of VME64x bus. The 4-level bus arbitration and dual-port DRAM sharing mechanism ensure conflict-free and low-latency collaborative operation of rack-mounted I/O and communication modules.
The on-board watchdog, programmable timers and non-volatile SRAM provide full-process fault tolerance and data protection. The system automatically resets and recovers from program deadlock or hardware exceptions, and retains key operating data and fault logs to avoid system paralysis and data loss. The rugged wide-temperature structure ensures long-term stable operation of the VME embedded control system under complex working conditions.
5. Application Scenarios
1. Core main control unit for 3U VME architecture industrial control systems such as power plant turbine control equipment.
2. High-end embedded real-time measurement and control systems for military testing and precision instrument acquisition.
3. Rail transit signal processing and vehicle-mounted mobile industrial control equipment.
4. Performance upgrading and fault replacement of legacy aging VME single-board computers.
