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GE VMIC-7700

. Core Architecture

  • Processor: Intel Ultra Low Voltage Celeron at 400 MHz or 650 MHz, featuring 256 KB on-die L2 cache and 100 MHz front-side bus for power-efficient embedded operations ().
  • Memory:
    • SDRAM: Up to 512 MB via 144-pin SODIMM PC100 modules ().
    • Non-Volatile Storage: 1 GB bootable CompactFlash on secondary IDE for OS/firmware retention ().
    • Battery-Backed SRAM: 32 KB for critical data persistence during power loss .
  • Bus Standards:
    • VME64 Compliance: Supports A16/A24/A32 addressing, BLT32/BLT64 block transfers, and 2eSST 320 MB/s peak throughput ().
    • VMIC 1.3 Interface: Enables deterministic communication between VMIC devices and VME systems ().
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2. I/O & Connectivity

  • Network: Dual 10/100BaseTX Ethernet (RJ45) with remote boot (PXE/DHCP) and IEEE 1588v2 time synchronization ().
  • Serial Ports: Two 16550-compatible RS-232 ports (115 Kbaud, 16-byte FIFO buffers) .
  • USB: Front-panel dual USB 1.1 hubs for peripheral connectivity .
  • Graphics: Integrated 815E AGP controller with 4 MB SGRAM, supporting resolutions up to 1,600 × 1,200 pixels .
  • Expansion: PMC site (PCI-X, 66 MHz) for custom modules (e.g., MIL-STD-1553, fiber optics) ().

3. Environmental & Electrical

  • Operating Temperature: 0°C to +55°C (industrial range); storage at -40°C to +85°C (().
  • Power: +5VDC ±5% (600 mA typical); <5W consumption in low-power mode ().
  • Robustness:
    • Passive cooling (fanless design); IP40/IP67 sealing options ().
    • Conformal coating for humidity resistance (5–95% non-condensing) .
  • Compliance: CE/FCC Class A, RoHS, MIL-STD-461F EMC .

Functional Features

1. Real-Time Determinism

  • Hardware DMA Engines: Enable 40 MB/s sustained data throughput with zero CPU overhead for time-critical tasks (e.g., radar signal processing) ().
  • Programmable Watchdog Timer: Auto-resets system on software/hardware faults, ensuring continuous operation in safety-critical applications ().
  • Endian Conversion Hardware: Seamless data interoperability between big-endian (Motorola) and little-endian (x86) systems .

2. Flexible Expansion & Integration

  • Dual-Bus Architecture: Bridges VMIC sensors/actuators to VME control systems for unified data acquisition and command execution ().
  • Field-Reconfigurable I/O: Software-defined signal modes (e.g., RS-232/422/485 voltage levels) via VMEbus writes .

3. Embedded Diagnostics

  • Built-in Self-Test (BIT): Validates memory, bus integrity, and peripheral health at startup/runtime; faults reported via front-panel LEDs ().
  • Optical Isolation: ≥1,500V channel-to-bus isolation eliminates ground loops in high-EMI environments (e.g., power substations) .

Application Scenarios

Domain Use Cases Key Capabilities Utilized
Aerospace & Defense Radar signal processing, flight control simulators, missile guidance systems 320 MB/s VME64 throughput; PMC site for MIL-STD-1553 integration ().
Industrial Automation Robotic assembly lines, PLC-based safety interlocks in steel mills 512 MB SDRAM for real-time data buffering; optical isolation for motor control ().
Energy Systems Nuclear/thermal power plant DCS, wind turbine monitoring Wide temperature resilience (0°C to +55°C); IEEE 1588v2 for grid synchronization ().
Scientific Research Particle accelerator data acquisition, fusion reactor control CompactFlash boot for offline operation; deterministic DMA transfers ().

Technical Differentiation

Parameter VMIVME-7700 Standard VME SBCs
Bus Throughput 320 MB/s (2eSST VME64) ≤132 MB/s (VME64)
Power Efficiency <5W (Ultra Low Voltage Celeron) 15–30W (PowerPC/Pentium M)
I/O Flexibility Software-configurable serial/RS-485 Fixed voltage levels
Diagnostics Optical isolation + BIT Basic error logging

Integration & Ecosystem

  • OS Support: VxWorks, QNX, Linux RT, Windows Embedded ().
  • Compatible Hardware:
    • GE VMIC CPUs (e.g., VMIVME-7750); VME64x backplanes ().
    • PMC modules for CANbus, PROFIBUS-DP, or 10G fiber optics .
  • Development Tools:
    • Proficy® Cimplicity APIs for LabVIEW/C++ integration; Yotta Utility for configuration ().

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