VMIC-7700 Single Board Computer

Module Feature

VMIC-7700 is a single-slot 6U VMEbus single board computer powered by Intel ultra-low voltage Celeron processor, available in 400 MHz and 650 MHz versions with Intel 815E chipset and 100 MHz front-side bus. It supports up to 512 MB PC100 SDRAM via 144-pin SODIMM socket, equipped with 32 KB battery-backed nonvolatile SRAM for persistent parameter and fault log storage. Storage options include bootable CompactFlash up to 1 GB and IDE hard disk interface via P2 rear connector. Integrated VGA graphics controller supports standard industrial display resolution. Dual independent 10/100BASE-TX Ethernet ports provide redundant network communication. Serial interfaces include two software configurable RS232/422/485 channels with hardware flow control, dual USB1.1 host ports and battery-backed real-time clock. One PMC mezzanine expansion slot accepts 3.3 V /5 V PMC modules for fiber RFM, analog I/O or extra communication interfaces. VME64 bus compliance supporting A24/A32 addressing, D16/D32/D64, BLT and MBLT block transfer modes. Programmable hardware watchdog timer can trigger NMI, VME SYSFAIL or full system reset for fail-safe operation. Rugged Eurocard construction, widely used in gas/steam turbine control, hardware-in-loop simulation, power plant control and high-reliability industrial VME chassis.

Working principle

Intel ULV Celeron processor executes real-time operating system and user control application. PCI-to-VME transparent bridge chip implements full VME master and slave capability to access registers and memory of other VME peripheral modules. PMC slot extends system function by mounting mezzanine I/O or communication boards. Dual Ethernet controllers handle redundant network data transmission; multi-protocol UART chips drive configurable RS serial ports. Battery-backed RTC retains system time and nonvolatile SRAM preserves critical parameters during power outage. CompactFlash or IDE stores boot firmware and application image. Hardware watchdog continuously monitors software heartbeat; timeout event triggers hardware reset or fault interrupt to avoid system hang. VME interrupt controller accepts interrupt signals from peripheral VME modules and forwards to CPU core.

Onboard components

Intel ULV Celeron CPU, 144-pin SODIMM socket, VGA graphics chip, dual 10/100 Ethernet PHY, dual multi-mode UART, dual USB1.0 controller, battery-backed RTC, 32 KB nonvolatile SRAM, CompactFlash & IDE controller, PCI-VME bridge chip, watchdog timer 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, Ethernet link/activity, VME SYSFAIL fault and watchdog alarm.

Hardware self-diagnosis

Visual inspection of PCB, front ejectors and solder joints; board ID register readback and firmware verification; power-on POST self-test; memory read/write cyclic verification; Ethernet loopback test; serial port communication test; watchdog timeout validation; VME A32/MBLT 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: VMIC-7700 Brand: VMIC Device type: 6U VMEbus VME64 single board computer Bus standard: VME64, A24/A32 addressing, D16/D32/D64, MBLT block transfer Processor: Intel ULV Celeron 400 / 650 MHz Memory: Max 512 MB PC100 SDRAM, 32 KB battery-backed SRAM Storage: CompactFlash up to 1 GB, IDE interface Graphics: VGA standard resolution Interfaces: Dual 10/100 Ethernet, 2 × RS232/422/485, dual USB1.1 Expansion: One PMC mezzanine slot Control mode: VME master / slave operation, programmable hardware watchdog Power supply: +5 V from VME backplane Cooling: Passive convection cooling Protection: Over current, ESD protection, watchdog auto-reset, VME bus error detection Mounting: Standard 6U VME front panel ejector locking Protection class: PCB with optional conformal coating

Mechanical & Structure

Mounting: Standard single-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 low power VME64 single board computer

Installation

Follow ESD safety procedure before handling. Fully power off VME chassis. Insert VMIC-7700 into vacant 6U VME slot and lock front panel ejector latches. Install PMC mezzanine module if required. Connect front panel Ethernet, serial, USB and VGA peripherals. Power on chassis and enter BIOS to configure boot sequence 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, dual RJ45 10/100 Ethernet, dual DB9 serial ports, VGA video, dual USB1.1, CompactFlash slot, fault status signal pins.

Diagnostic

Board fails POST: faulty SODIMM memory, defective CPU chip 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-7700 VMIC single height 6U VME64 single board computer,Intel ULV Celeron 400/650 MHz CPU,PMC expansion slot and dual fast Ethernet,for low-power rugged embedded control,power plant turbine monitoring and real-time hardware-in-loop simulation VME chassis systems.