VMIC VMIVME-7750-74 Single Board Computer

Module Feature

VMIC VMIVME-7750-74 is a single-slot 6U VMEbus Rev C.1 single board computer based on Intel Pentium III processor with 512 KB L2 cache and Intel 815E chipset, 133 MHz front side bus. It supports up to 512 MB SODIMM SDRAM, equipped with one PMC mezzanine expansion site for reflective memory or custom I/O modules. Integrated AGP VGA graphics controller, 10/100 Mbps fast Ethernet, dual 16550 compatible RS232 serial ports, dual USB ports, ATA-100 IDE storage interface, PS/2 keyboard/mouse and hardware watchdog timer. Flash BIOS supports field firmware upgrade. Passive heatsink cooling design without fan, rugged Eurocard construction with shock and vibration resistance, widely used in real-time simulation, industrial process control, aerospace test and data acquisition systems.

Working principle

The Pentium III processor executes embedded operating system and user application code. PCI-to-VME bridge provides VMEbus master and slave functions for high-speed data exchange with other VME modules inside chassis. PMC slot supports mezzanine card expansion for additional communication or I/O functions. Onboard peripherals including Ethernet, serial ports and VGA controller are mapped into CPU address space. Flash memory stores BIOS firmware for system boot; programmable watchdog timer automatically resets the board upon software lockup to enhance system reliability.

Onboard components

Intel Pentium III CPU, Intel 815E chipset, SODIMM SDRAM socket, AGP VGA video chip, 10/100 Ethernet PHY, dual UART serial controller, flash BIOS chip, watchdog logic, PMC connector, VME J1/J2 transceivers, front panel I/O connectors, status LED array.

LED indicators

Front panel LEDs for power status, 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 test; Ethernet loopback test; serial port communication 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 board diagnostic firmware.

Electrical & Process Parameters

Model: VMIVME-7750-74 Device type: 6U VMEbus single board computer Bus standard: VMEbus Rev C.1 Processor: Intel Pentium III Memory: Up to 512 MB SODIMM SDRAM Control mode: VME master / slave operation, hardware watchdog Power supply: +5 V from VME backplane Cooling: Passive convection cooling Protection: Over current, ESD protection, watchdog auto-reset Mounting: Standard 6U VME front panel ejector locking Protection class: Conformal coating optional

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 Pentium III VME single board computer

Installation

Follow ESD safety procedure before handling. Fully power off VME chassis. Insert VMIVME-7750-74 into empty 6U VME slot and lock front panel ejector latches. Connect front panel VGA, Ethernet, serial, USB and PS/2 peripherals. Power on chassis and enter BIOS to configure boot sequence and watchdog parameters. Install OS and VMIC VME drivers, run full board diagnostic before commissioning.

Interface

VME J1/J2 backplane connector, PMC mezzanine site, VGA video, 10/100 RJ45 Ethernet, dual RS232 serial ports, dual USB, PS/2 keyboard/mouse, IDE storage via P2 rear I/O.

Diagnostic

Board fails POST: faulty SODIMM memory, defective CPU, insufficient backplane power. VME communication abnormal: poor backplane contact, missing bus termination, PCI-VME bridge hardware fault. Ethernet no link: damaged cable, PHY chip failure, wrong duplex configuration. Watchdog malfunction: incorrect BIOS watchdog parameter setting.

Product Brief

VMIVME-7750-74 VMIC 6U VME single board computer,Pentium III CPU,onboard PMC slot and VGA,for embedded real-time control,aerospace test and VME chassis simulation systems.