VMIC 332-000131-B Optical Extender Reflective Memory Board

Module Feature

332-000131-B is a double-slot 6U VMEbus optical extender reflective memory board developed by VMIC, matched for VMIVME-5530M reflective memory series. It adopts VME64 bus interface, supporting A16/A24/A32 addressing and D08/D16/D32, BLT, MBLT64 block transfer modes, can operate as VME slave or system controller. The board serves as fiber optical extender for reflective memory ring network, extending transmission distance between RFM nodes via duplex fiber. It carries high-speed fiber transceiver module and dedicated RFM FPGA controller, local shared memory synchronizes automatically across all network nodes by hardware without CPU protocol stack processing. Two independent DMA channels realize bulk high-speed data transmission, reducing host CPU overhead. Built-in error detection and BIT diagnostic circuit monitors fiber link status, memory parity error and data integrity continuously, and latches fault flags in status register. Nonvolatile configuration memory stores unique node ID, fiber mode and network parameters. Rugged double Eurocard design with conformal coating, shock and vibration screened, widely used in gas/steam turbine distributed control, aerospace hardware-in-loop simulation and semiconductor real-time test VME chassis.

Working principle

VME bus data written to onboard shared memory is captured by RFM FPGA, then packaged and broadcasted to all nodes on fiber ring through optical transceiver. Remote nodes automatically refresh local memory copy in hardware. Optical extender circuit converts electrical RFM signal to optical signal for long-distance transmission and completes photoelectric conversion on receiving side. DMA controller moves mass data between VME system memory and local RFM memory efficiently. BIT circuit continuously checks fiber link quality and memory parity; once communication abnormality is detected, fault signal is reported to VME host. Network interrupt channel sends event trigger messages between distributed control nodes.

Onboard components

VME interface FPGA, reflective memory control logic, duplex fiber optical transceiver, shared SDRAM array, dual DMA controller, BIT error detection circuit, nonvolatile configuration memory, VME J1/J2 edge connector, front panel duplex LC fiber port, multi-status LED array, manual reset switch.

LED indicators

Front panel LED indicators for board +5 V power, fiber link status, RFM network activity and communication fault alarm.

Hardware self-diagnosis

Visual inspection of PCB, front ejectors and solder joints; board ID register readback verification; onboard memory parity test; fiber ring link continuity self-test; DMA/PIO transfer validation; VME bus read/write communication test.

Programming software

VMIC reflective memory driver library and configuration utility, supports VxWorks, Linux, QNX and Windows embedded operating systems; tool for node ID assignment, fiber parameter setup and network fault monitoring.

Electrical & Process Parameters

Model: 332-000131-B Brand: VMIC Device type: Double-slot 6U VMEbus optical extender reflective memory module Bus standard: VME64, A16/A24/A32 addressing, D08/D16/D32, MBLT64 block transfer Fiber interface: Duplex LC connector, multimode / single-mode fiber optional Control mode: Hardware automatic memory synchronization, dual DMA channels, BIT continuous error monitoring Power supply: +5 V from VME backplane Cooling: Convection cooling Protection: Memory parity error detection, fiber link fault monitoring, ESD protection Mounting: Double-height 6U VME front panel ejector locking Protection class: PCB with conformal coating

Mechanical & Structure

Mounting: Double-slot 6U VME Eurocard Protection class: PCB with conformal coating

Environmental

Operating temperature: 0℃ ~ +60℃ Storage temperature: -40℃ ~ +85℃ Ambient humidity: 5~95% non-condensing Certification: CE compliant Status: VMIC VME fiber optical extender reflective memory board

Installation

Follow ESD safety procedure before handling. Fully power off VME chassis. Insert 332-000131-B into vacant double-height 6U VME slot and lock front panel ejector latches. Connect duplex fiber cable to build ring topology for reflective memory network. Power on chassis, install VMIC RFM driver, assign unique node ID and run fiber link BIT diagnostic before commissioning.

Interface

VME J1/J2 backplane connector, front panel duplex LC fiber port, network interrupt status register pins.

Diagnostic

No fiber link LED: damaged fiber cable, incorrect TX/RX wiring or optical transceiver failure. Memory parity error: onboard SDRAM chip fault. Cross-node data desync: duplicate node ID or ring break. DMA transfer abort: VME bus resource conflict.

Product Brief

VMIC 332-000131-B double height 6U VME optical extender reflective memory board,hardware deterministic memory synchronization over fiber ring network,for multi-node distributed real-time control and hardware-in-loop simulation VME systems.