VMIC VMIVME-7589A-4 46 Single Board Computer

Module Feature

VMIVME-7589A-4 46 is a single-slot 6U VMEbus single board computer developed by VMIC, powered by Intel Pentium MMX processor, designed for high reliability real-time industrial control applications. It supports up to 128 MB SDRAM via DIMM socket, equipped with 32 KB battery-backed nonvolatile SRAM to preserve critical control parameters and fault logs after power loss. 8 MB onboard bootable flash memory serves as non-volatile system storage, with secondary IDE interface routed through rear P2 connector. Hardware endian conversion circuit automatically completes big/little endian byte swap for cross-endian VME bus communication between x86 little-endian CPU and big-endian VME peripheral modules. Onboard peripheral resources include one 10/100BASE-TX Ethernet port, dual RS232 serial ports, 64-bit PCI SVGA graphics controller with 2 MB SGRAM, front-panel PS/2 keyboard & mouse and battery-backed real-time clock. Programmable hardware watchdog timer; watchdog timeout can trigger NMI interrupt, VME SYSFAIL signal or full system hardware reset. Fully VME64 compliant, supporting A16/A24/A32 addressing, D08/D16/D32 block transfer modes, capable of acting as VME bus system controller. Rugged single 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 MMX processor executes PC/AT compatible operating system and user control application. PCI-VME transparent 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. Onboard flash stores OS and firmware, battery-backed SRAM retains configuration and fault data during power outage. 10/100 Ethernet controller handles network data transmission; dual UART chips drive RS232 serial communication. 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 MMX CPU, DIMM memory socket, PCI SVGA graphics chip with 2 MB SGRAM,10/100 Ethernet PHY chip,dual UART,IDE flash controller,32 KB battery-backed SRAM,battery-backed RTC,PCI-VME bridge,programmable watchdog logic,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,VME bus 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 port loopback test;watchdog timeout validation;VME A16/A24/A32 read/write 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-7589A-4 46 Brand: VMIC Device type: Single-slot 6U VMEbus VME64 single board computer Bus standard: VME64, A16/A24/A32 addressing, D08/D16/D32 transfer Processor: Intel Pentium MMX Memory: Max 128 MB SDRAM,32 KB battery-backed nonvolatile SRAM Graphics: PCI SVGA with 2 MB SGRAM Interfaces: 1 × 10/100 Ethernet,2 × RS232 serial,PS/2 keyboard & mouse,IDE flash storage Control mode: VME master / slave operation,hardware byte swap,programmable watchdog Power supply: +5 V / +12 V from VME backplane Cooling: Forced air cooling Protection: Over current,ESD protection,watchdog auto-reset,VME bus error detection Mounting: Standard single-height 6U VME front panel ejector locking Protection class: PCB with conformal coating

Mechanical & Structure

Mounting: Standard single-slot 6U VME Eurocard Protection class: PCB with conformal coating

Environmental

Operating temperature: 0℃ ~ +55℃ Storage temperature: -40℃ ~ +85℃ Ambient humidity: 5~95% non-condensing Certification: CE compliant Status: VMIC single slot Pentium MMX VME64 single board computer

Installation

Follow ESD safety procedure before handling.Fully power off VME chassis.Insert VMIVME-7589A-4 46 into vacant 6U VME slot and lock front panel ejector latches.Connect front panel Ethernet,serial,PS/2 and video peripherals.Wire IDE 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,RJ45 10/100 Ethernet,dual RS232 serial ports,SVGA video,PS/2 keyboard/mouse,IDE via P2 rear I/O,fault status signal pins.

Diagnostic

Board fails POST: faulty DIMM memory,defective CPU chip or abnormal backplane power. VME communication 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 set

Product Brief

VMIC VMIVME-7589A-4 46 single height 6U VME64 single board computer,Intel Pentium MMX CPU,hardware byte swap and 32 KB battery-backed SRAM,for rugged embedded control,power plant DCS and real-time hardware-in-loop simulation VME chassis systems.