VMIC VMIVME-7697-36 7 Single Board Computer

Module Feature

VMIVME-7697-36 7 is a double-slot 6U VMEbus single board computer developed by VMIC, powered by Intel Pentium III processor running at 850 MHz with 256 KB advanced transfer cache, built on Intel 440BX chipset and 100 MHz front side bus. It supports up to 512 MB SODIMM SDRAM, equipped with 128 KB battery-backed nonvolatile SRAM for retaining critical control parameters and fault logs after power loss. The board carries optional bootable flash storage, Ultra-IDE and floppy controller routed through P2 rear connector. One PMC mezzanine expansion site supports 5 V PMC modules for fiber reflective memory, analog I/O or additional communication interfaces. It integrates hardware endian conversion circuit to complete automatic big/little endian data conversion during VME bus access. Onboard peripheral resources include one 10/100BASE-TX Ethernet port, dual 16550-compatible RS232 serial ports, ECP/EPP enhanced parallel port, USB1.1 interface, front-panel PS/2 keyboard & mouse and battery-backed real-time clock. Three independent 32-bit programmable timers and software-selectable hardware watchdog timer; watchdog timeout can trigger NMI interrupt, VME SYSFAIL signal or full system hardware reset. Fully compliant with VME64 standard, supporting A16/A24/A32 addressing, D08/D16/D32, BLT and MBLT64 block transfer modes, capable of acting as VME bus system controller. Rugged double Eurocard construction with conformal coating, shock and vibration screened for power plant cabinet environment, widely used in gas/steam turbine control, power plant DCS, aerospace hardware-in-loop simulation and high-reliability industrial VME chassis.

Working principle

Intel Pentium III processor executes PC/AT compatible operating system and user control application. Tundra Universe II PCI-VME bridge chip implements full VME master and slave function, accessing registers and memory of other VME peripheral modules. Hardware byte swap circuit automatically adjusts data byte sequence for cross-endian bus communication between x86 CPU and big-endian VME devices. PMC mezzanine slot expands system functions by installing additional I/O or communication modules. 10/100 Ethernet controller handles network data transmission; dual 16550 UART chips drive RS232 serial communication. Battery-backed RTC maintains system time, and nonvolatile SRAM preserves key configuration data during power outage. Hardware watchdog continuously monitors software heartbeat signal; once timeout occurs, it triggers fault interrupt or hardware reset to avoid system lockup. VME interrupt controller receives interrupt signals from peripheral VME boards and forwards to CPU core.

Onboard components

Intel Pentium III 850 MHz CPU,144-pin SODIMM memory socket,S3 Trio AGP SVGA graphics chip with 4 MB video DRAM,10/100 Ethernet PHY chip,dual 16550 UART,ECP/EPP parallel port,USB1.1 controller,128 KB battery-backed SRAM,battery-backed RTC,Ultra-IDE & floppy controller,Tundra Universe II PCI-VME bridge,three 32-bit programmable timers,watchdog logic,PMC connector,VME J1/J2 transceivers,front panel I/O connectors,multi-status LED array,manual reset pushbutton.

LED indicators

Front panel LED indicators for board +5 V power,IDE storage activity,VME SYSFAIL fault and watchdog alarm.

Hardware self-diagnosis

Visual inspection of PCB,front ejectors and solder joints;board ID register readback verification;power-on POST self-test;memory read/write cyclic verification;SVGA display test;Ethernet loopback test;serial and parallel port loopback test;watchdog timeout validation;VME A32/MBLT64 block transfer communication test.

Programming software

VMIC board support package and driver library,supports VxWorks,Linux,QNX and Windows embedded operating systems;universal BIOS/bootloader configuration utility for memory,boot sequence and watchdog setup.

Electrical & Process Parameters

Model: VMIVME-7697-36 7 Brand: VMIC Device type: Double-slot 6U VMEbus VME64 single board computer Bus standard: VME64, A16/A24/A32 addressing, D08/D16/D32, MBLT64 block transfer Processor: Intel Pentium III 850 MHz Memory: Max 512 MB SODIMM SDRAM,128 KB battery-backed nonvolatile SRAM Graphics: AGP SVGA with 4 MB video DRAM Interfaces: 1 × 10/100 Ethernet,2 × RS232 serial,ECP/EPP parallel,USB1.1,PS/2 keyboard & mouse,IDE / floppy via P2 Expansion: One PMC mezzanine slot Control mode: VME master / slave operation,hardware byte swap,programmable watchdog Power supply: +5 V from VME backplane Cooling: Forced air cooling Protection: Over current,ESD protection,watchdog auto-reset,VME bus error detection Mounting: Double-height 6U VME front panel ejector locking Protection class: PCB with optional conformal coating

Mechanical & Structure

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

Environmental

Operating temperature: 0℃ ~ +60℃ Storage temperature: -40℃ ~ +85℃ Ambient humidity: 5~95% non-condensing Certification: CE compliant Status: VMIC double-slot Pentium III VME64 single board computer

Installation

Follow ESD safety procedure before handling.Fully power off VME chassis.Insert VMIVME-7697-36 7 into vacant double-height 6U VME slot and lock front panel ejector latches.Install PMC mezzanine module if required.Connect front panel Ethernet,serial,USB,PS/2 and video peripherals.Wire IDE or floppy storage devices to rear P2 connector.Power on chassis and enter BIOS to configure boot sequence,memory and watchdog parameters.Install OS and VMIC VME drivers,run POST and full peripheral diagnostic before commissioning.

Interface

VME J1/J2 backplane connector,PMC mezzanine site,RJ45 10/100 Ethernet,dual DB9 RS232 serial ports,SVGA video,USB1.1,PS/2 keyboard/mouse,IDE/floppy via P2 rear I/O,fault status signal pins.

Diagnostic

Board fails POST: faulty SODIMM memory,defective CPU chip,insufficient chassis airflow or abnormal backplane power. VME block transfer unstable: poor backplane contact,missing bus termination,PCI-VME bridge hardware fault. Network link failure: damaged cable,PHY chip damage or duplex mismatch. RTC and SRAM data loss: backup battery depletion. Watchdog fails to trigger: wrong BIOS watchdog parameter setup.

Product Brief

VMIC VMIVME-7697-36 7 double height 6U VME64 single board computer,Intel Pentium III 850 MHz CPU,one PMC expansion slot and hardware byte swap,for high-performance rugged embedded control,power plant DCS and real-time hardware-in-loop simulation VME chassis systems.