VMIC VMIVME-5531M Reflective Memory Interface Board

Module Feature

VMIVME-5531M is a single-slot 6U VMEbus reflective memory node board developed by VMIC (GE Automation), compatible with VMIC 5530M, VMIPCI-5565 and VMIPMC-5565 reflective memory series, supporting mixed VME / PCI / PMC ring network construction. It adopts VME64 bus interface, supporting A16/A24/A32 addressing and D08/D16/D32, BLT, MBLT64 block transfer modes, can work as VME slave or VME system controller. Onboard high-speed SDRAM serves as shared reflective memory, available in 128 MB / 256 MB memory configurations. ST multimode fiber interface runs at 2.12 Gbaud serial rate, maximum transmission distance 300 m, one fiber ring can accommodate up to 256 independent nodes. When the VME host writes data to local onboard memory, dedicated hardware automatically replicates data to all other nodes on the fiber ring without TCP/IP protocol stack overhead. Dual independent DMA channels realize bulk high-speed data transmission to reduce host CPU load. Programmable network interrupt allows any node to send event interrupt notification to remote nodes. Built-in CRC error detection and BIT diagnostic circuit continuously monitors optical signal, memory parity and data integrity, latches fault information in status register. Node bypass relay keeps the ring network operating normally when a single node fails. Rugged single Eurocard PCB with conformal coating,shock and vibration screened for power plant cabinet environment,widely used in gas/steam turbine distributed control,hardware-in-loop real-time simulation,aerospace test and semiconductor real-time control VME chassis.

Working principle

From the perspective of VME host CPU, onboard memory of VMIVME-5531M appears as standard physical memory address space. Once VME master writes data to this memory region, reflective memory ASIC captures write operation, packages data and broadcasts it over fiber ring to every node on the network. Hardware on remote nodes automatically refreshes local shared memory copy. All data synchronization is completed by dedicated hardware to realize ultra-low deterministic latency. Interrupt message channel implements cross-node event notification. BIT circuit detects optical signal loss and CRC check error to judge communication quality. VME FPGA completes bus address decoding, PIO and DMA data handshake between VME host and reflective memory controller.

Onboard components

VME interface FPGA,reflective memory ASIC controller,2.12 Gbaud duplex ST fiber transceiver module,128/256 MB SDRAM array,dual DMA controller,CRC error detection logic,programmable network interrupt circuit,node bypass relay,nonvolatile EEPROM for node ID storage,ST fiber optical port,VME J1/J2 edge connector,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,components and solder joints;board ID register readback verification;onboard SDRAM full read/write test;fiber ring continuity test;CRC error injection verification;DMA block transfer test;VME A32/MBLT64 bus read/write communication test.

Programming software

VMIC reflective memory driver library and configuration utility,supports VxWorks,Linux,QNX and Windows operating systems;software tool for memory mapping,unique node ID assignment,interrupt configuration and fault log reading.

Electrical & Process Parameters

Model: VMIVME-5531M Brand: VMIC Device type: Single-slot 6U VMEbus fiber optic reflective memory node board Bus standard: VME64, A16/A24/A32 addressing, D08/D16/D32, MBLT64 block transfer Fiber baud rate: 2.12 Gbaud Onboard shared memory: 128 MB / 256 MB SDRAM Max nodes per ring: 256 Fiber transmission distance: Multimode fiber up to 300 m Control mode: Hardware automatic memory replication,dual DMA channels,network interrupt,BIT continuous error monitoring,node bypass Power supply: +5 V from VME backplane Power consumption: 10–13 W typical Cooling: Forced air cooling Protection: CRC data error detection,node bypass protection,ESD protection,overcurrent protection Mounting: Single-height 6U VME front panel ejector locking Protection class: PCB with optional conformal coating

Mechanical & Structure

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

Environmental

Operating temperature: 0℃ ~ +55℃ Storage temperature: -40℃ ~ +85℃ Ambient humidity: 20~80% non-condensing Certification: CE compliant Status: VMIC single slot VME fiber reflective memory board

Installation

Follow ESD safety procedure before handling.Fully power off VME chassis.Insert VMIVME-5531M into vacant single-height 6U VME slot and lock front panel ejector latches.Connect duplex ST fiber cable to build ring topology.Power on chassis,install VMIC RFM driver,assign unique node ID and run BIT fiber diagnostic before commissioning.

Interface

VME J1/J2 backplane connector,front-panel duplex ST fiber port,network interrupt register pins,fault status signal pins.

Diagnostic

Board undetected: poor VME backplane contact,damaged edge connector or incorrect VME address configuration. Fiber link loss: broken fiber cable,reverse TX/RX fiber wiring or optical transceiver failure. Cross-node data desync: duplicate node ID or broken fiber ring. DMA transfer abort: VME bus resource conflict or DMA controller hardware fault.

Product Brief

VMIC VMIVME-5531M single height 6U VME fiber reflective memory board,with 2.12 Gbaud ST multimode fiber ring,hardware-driven deterministic shared memory replication and node bypass function,supports mixed VME/PCI/PMC multi-node network,for gas/steam turbine distributed control and hardware-in-loop real-time simulation VME chassis systems.