VMIC VMIVME-7751-76003 Single Board Computer

Module Feature

VMIC VMIVME-7751-76003 is a double-slot 6U VME64 Eurocard single board computer built around Intel Pentium III processor up to 1.26 GHz with 256/512 KB L2 cache and Intel 815E chipset, 133 MHz front side bus. It accepts one SODIMM socket supporting up to 512 MB PC133 SDRAM. Integrated AGP SVGA graphics controller with 4 MB display buffer. Dual independent 10/100 Mbps fast Ethernet controllers for redundant network communication. Up to three PMC mezzanine expansion sites (two support rear P2 I/O) for reflective memory or custom I/O modules. Optional PCI dual-channel Ultra160 SCSI, IDE storage interface supporting hard disk or up to 1 GB boot flash. Equipped with 32 KB nonvolatile SRAM, two 16-bit plus two 32-bit programmable timers, software-selectable hardware watchdog timer, and remote Ethernet boot function. Flash BIOS supports field firmware upgrade. Passive heatsink cooling design, rugged double-height 6U VME construction with shock and vibration resistance, widely used in real-time simulation, industrial process control, turbine safety control and aerospace test systems.

Working principle

The Pentium III processor executes embedded operating system and user application code. PCI-to-VME bridge implements full VME64 master/slave functions supporting A32/A24/D32/D16/MBLT64/BLT32 transfer modes for high-speed data exchange with other VME modules. Triple PMC slots expand board capability with mezzanine cards for extra communication or signal acquisition. Onboard peripherals including dual Ethernet, SVGA video and IDE storage are mapped into CPU address space. Nonvolatile SRAM preserves critical configuration data after power loss. Flash memory stores BIOS firmware for system boot; programmable watchdog timer automatically resets the board when software crash occurs to maintain system reliability. Hardware endian conversion supports seamless data exchange between little-endian and big-endian devices.

Onboard components

Intel Pentium III CPU, Intel 815E chipset, SODIMM SDRAM socket, AGP SVGA video chip, dual 10/100 Ethernet PHY chips, multi-channel timer logic, 32KB NVRAM, flash BIOS chip, watchdog FPGA, triple PMC connectors, VME J1/J2 transceivers, front panel I/O connectors, status LED array.

LED indicators

Front panel LED indicators for power, CPU heartbeat, Ethernet link/activity and system fault warning.

Hardware self-diagnosis

Visual inspection of PCB, front panel ejectors and soldering joints; power-on POST self-test; memory read/write cyclic verification; VME register access and burst transfer test; Ethernet loopback test; timer and NVRAM read/write test; BIOS and watchdog function validation.

Programming software

Supports VxWorks, Linux, Windows NT/2000 embedded OS; VMIC VME device driver suite, BIOS configuration utility and dedicated board diagnostic firmware.

Electrical & Process Parameters

Model: VMIVME-7751-76003 Device type: Double-height 6U VME64 single board computer Bus standard: VMEbus Rev C.1, VME64 transfer modes Processor: Intel Pentium III up to 1.26 GHz Memory: Max 512 MB PC133 SDRAM, 32 KB nonvolatile SRAM Control mode: VME master / slave operation, hardware watchdog Power supply: +5 V, ±12 V from VME backplane Cooling: Convection passive cooling Protection: Over current, ESD protection, watchdog auto-reset Mounting: Double height 6U VME front panel ejector locking Protection class: Conformal coating optional

Mechanical & Structure

Mounting: Standard 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 rugged double-height VME Pentium III single board computer

Installation

Follow ESD safety procedure before handling. Fully power off VME chassis. Insert VMIVME-7751-76003 into vacant double-height 6U VME slot and lock front panel ejector latches. Connect front panel SVGA, Ethernet, serial and storage peripherals as required. Power on chassis and enter BIOS to configure boot sequence, memory and watchdog parameters. Install OS and VMIC VME drivers, run full board diagnostic before commissioning.

Interface

VME J1/J2 backplane connector, triple PMC mezzanine sites, SVGA video, dual 10/100 RJ45 Ethernet, IDE/Flash storage, optional Ultra160 SCSI, rear I/O via P2 connector.

Diagnostic

Board fails POST: faulty SODIMM memory, defective CPU chip, insufficient backplane power. VME burst transfer abnormal: poor backplane contact, missing bus termination, PCI-VME bridge hardware fault. Dual Ethernet no link: bad network cable, PHY chip damage, incorrect duplex configuration. NVRAM data loss: battery depletion or NVRAM chip failure. Watchdog fails to trigger: wrong BIOS watchdog parameter setup.

Product Brief

VMIVME-7751-76003 VMIC double height 6U VME64 single board computer,Pentium III CPU,triple PMC expansion sites and dual fast Ethernet,for high-performance embedded real-time control,aerospace test and VME chassis simulation systems.