GE VMIVME-7648 Single Board Computer

GE VMIVME-7648 Single Board Computer

Basic Overview

VMIVME-7648 is an Intel based device ®  Pentium ®  The VMEbus single board computer (SBC) with III processor has high performance and rich functions, suitable for various embedded system application scenarios.

Main characteristics

Processor and Memory

Processor: Adopting Intel Pentium III processor, it offers two options of 933 MHz and 1.26 GHz, both equipped with 256 Kbyte advanced transfer cache (on-chip full speed L2 cache), adopting a dual independent bus architecture, L2 cache and processor clock frequency are the same, improving performance. This processor supports 32-bit addressing and 64 bit data bus, with a superscalar architecture that allows for the execution of three instructions per clock cycle. It also features a dynamic branch prediction unit, independent instruction and data caches, and MMX ™  Technology.

Memory: Supports up to 512 Mbyte of PC-133 SDRAM through a 144 pin SDRAM SODIMM, with onboard DRAM and VMEbus dual port connection.

Display function

Built in AGP SVGA controller, paired with 4 Mbyte external synchronous DRAM cache and high bandwidth 64 bit data interface, supports high-resolution graphics and multimedia quality videos. In single view mode, the screen resolution can reach up to 1600 x 1200 x 256 colors, supporting multiple display modes and different bit depths and frequencies.

Network function

Equipped with two Intel Ethernet controllers (one 82559 and one integrated into the Intel chipset ICH2), supporting 10BaseT and 100BaseTX options through two RJ45 connectors, remote LAN boot, using Lanworks Technologies, Inc.'s BootWare, which can use NetWare, TCP/IP, or RPL network protocols for remote boot. BootWare also has multiple functions.

Interface and Port

The front panel has two 16550 compatible serial ports, and the serial channel has a 16 byte FIFO that supports baud rates up to 1.5 Mbaud, requiring the use of two micro DB-9 to standard DB-9 adapters.

Combination PS/2 keyboard and mouse connector, including Y-shaped adapter cable.

The universal serial bus (USB) of the front panel dual connection hub host controller supports synchronous data transfer, asynchronous message passing, peripheral self identification and configuration, and dynamic (hot) connection.

Onboard Ultra DMA/100 hard drive and floppy drive controller, connected to IDE/floppy disk using VMEbus P2.

Timer and Storage

Provide two 16 bit timers and two 32-bit timers (excluding system timers), which are mapped to the I/O space and can be fully programmed through software.

Software programmable watchdog timer, once enabled, the onboard software must access the timer within the specified time, otherwise it will timeout. User jumper can cause timeout and reset, while software can independently enable timeout causing non shielded interrupt (NMI) or VMEbus SYSFAIL.

32 Kbyte non-volatile SRAM that retains its contents in the event of a+5V power interruption or removal.

Expansion and Interface

Supports IEEE P1386 universal mezzanine card specification, with 5V PCI mezzanine card (PMC) expansion site, providing standard I/O through the front panel of VMEbus, and optional I/O connection to VMEbus P2.

The VMEbus interface is based on Newbridge/Mundra's Universe IIB high-performance PCI to VME interface, and has functions such as system controller, requester, mailbox, interrupt handler, interrupt handler, etc. It supports multiple arbitration modes, data transfer modes, byte swapping, and enhanced bus error handling capabilities.

Operating System and Software Support

Supports multiple operating systems, such as Windows ®  XP、Windows 2000、VxWorks ®、 Solaris ®、 QNX ®、 Linux ®  And LynxOS ®  Wait and provide corresponding board level support packages (BSP) and software tools, such as IOWorks ®  Software series, etc., facilitate application development.

Physical and Environmental Specifications

Size specifications: using 6U single slot Eurocard format, with a height of 9.2 inches (233.4mm), a depth of 6.3 inches (160mm), and a thickness of 0.8 inches (20.3mm). This standard size design allows it to be easily installed in systems that comply with the VMEbus specification, ensuring compatibility with other devices and ease of system integration.

Power requirements: The working voltage is divided into+5 VDC (± 5%),+12 VDC (± 5%), and -12 VDC (± 5%). Among them, the typical current for+5 VDC is 6A, with a maximum of 7A; the typical current for+12 VDC is 105mA, with a maximum of 200mA; and the typical current for -12 VDC is 50mA, with a maximum of 75mA. Moreover, the currents for+12 and -12 VDC are specified in the case of an open serial connector, providing clear parameter basis for the power supply design of the system and ensuring the stability and reliability of the power supply.

Temperature requirement: The original document indicates that the working temperature range is 0 to+50 ° C. Within this temperature range, the equipment can ensure normal operation. At the same time, it is required that the air flow measured outside the radiator be greater than 350LFM to ensure good heat dissipation and maintain stable performance of the equipment. The storage temperature range is -25 to+80 ° C, which specifies the temperature requirements for the storage environment of the device in non working conditions, ensuring that the device will not be damaged due to temperature issues under different storage conditions. The 51CTO blog shows that the industrial temperature range is -40 ℃ -+85 ℃, which differs from the original document and may be due to temperature ranges under different application scenarios or testing standards.

Relative humidity: The relative humidity requirement is between 10% and 90%, and it is required to be in a non condensing state. Within this humidity range, the equipment can avoid problems such as circuit short circuits and corrosion caused by high humidity, ensuring the stability of the electrical and mechanical performance of the equipment.

Other specifications: The DTB master-slave mode of the VMEbus interface supports multiple data transmission methods, such as BLT32/BLT64, A32/D32, etc; The requester is programmable and supports multiple modes; Interrupt handlers and arbitrators also have corresponding functions and modes. The PMC expansion site connector supports 5V signals and is suitable for Type 1 and Type 2. It uses a 32-bit PCI bus and has a maximum frequency of 33MHz. These specifications ensure the performance and compatibility of the device in terms of data transmission, interrupt handling, and expansion functions.

MTBF: The average time between failures (MTBF) is 118633 hours (Bellcore), which reflects the reliability of the equipment. It means that under normal use, the equipment can operate stably for a long time, reducing the frequency of failures and lowering maintenance costs