XYCOM XVME-660 High-performance VME64x Single-board Computer Detailed Product Description

I. Product Overview

XYCOM XVME-660 is a single-slot 6U VME64x specification, PC/AT compatible industrial-grade single-board computer (SBC) specially designed by XYCOM for high-reliability embedded and real-time control scenarios. It is equipped with an Intel Pentium M low-power processor, a PCI-to-VME64x bridge, large-capacity memory, and a rich set of peripheral interfaces. It can serve as the main control unit of a VME system, balancing x86 ecosystem software compatibility and VME bus real-time performance. It is widely used in industrial automation, aerospace, energy, rail transportation, and measurement and control systems in harsh environments. 

II. Core Functions and Features

(1) Low-power High-performance Pentium M Processor

Utilizing Intel Pentium M (Banias/Dothan), with a main frequency ranging from 1.5GHz to 1.8GHz. It features low power consumption (typical 10W level), balancing strong computing capabilities with low heat dissipation requirements, making it suitable for deployment in enclosed/high-density chassis.

It includes a maximum 2MB secondary cache, supports efficient instruction pipeline, and has no wait-state access to local memory, significantly enhancing real-time task response and data throughput.

It is fully compatible with x86 architecture, allowing direct operation of mainstream OSes such as Windows, Linux, VxWorks, etc., and has low development and migration costs.

(2) Large-capacity ECC Memory and Flexible Storage

Memory: On-board DDR SDRAM, standard 256MB to 512MB, maximum support 1GB, optional ECC verification to effectively resist data errors caused by electromagnetic interference in industrial environments, enhancing the stability of critical tasks.

Storage: Integrated EIDE/ATA controller, capable of directly connecting 2.5-inch hard drives, solid-state drives (SSD), or CompactFlash cards, supporting local system and data solidification; onboard **flash memory (Flash ROM)** is used for BIOS and firmware storage, not losing data upon power loss.

(3) VME64x Bus Master Control and High-speed Bridging

Natively supports VME64x (VMEbus IEEE 1014-1994), compatible with A16/A24/A32 address spaces, D32/D64 data transmission, with a maximum bandwidth of up to 80MB/s, suitable for high-speed data acquisition and multi-module parallel interaction.

It includes a built-in PCI-to-VME64x intelligent bridge, supporting VME bus master/slave control, arbitration, interrupt handling (7 levels), and IACK菊花链， capable of seamlessly managing all VME I/O modules within the chassis， compatible with the XVME series of boards.

The single-slot 6U structure supports hot swapping， complies with VMEbus mechanical specifications， is compatible with standard VME chassis， and is convenient for installation and maintenance.

(4) Rich Onboard I/O， No Need for Expansion Cards

Graphics Display： Integrated PCI VGA controller， with 4MB video memory， supporting resolutions of 1024×768/1280×1024， front panel DB15 interface directly connects to the monitor， supporting local operation and status monitoring.

Network Communication： Dual 10/100Mbps Ethernet (RJ-45)， Intel 8255x controller， supporting TCP/IP， UDP， DHCP， compatible with remote debugging， data upload， and system networking.

Serial Interfaces： 2×RS-232 high-speed serial ports (DB9)， supporting 115.2kbps， connecting terminals， sensors， PLCs or serial peripheral devices.

Other Interfaces： 1×USB 1.1， 1×EPP/ECP parallel port， PS/2 keyboard/mouse， audio interface， compatible with standard PC peripherals； the P2 interface can expand XVME-974 and other sub-boards， adding more serial ports/USB.

(5) Industrial-grade Reinforcement and Wide Temperature Reliability

Wide Temperature Design： Standard operating temperature 0℃ to 55℃， optional **-20℃ to 70℃ wide temperature model**， capable of withstanding industrial site vibrations， dust， humidity， and strong electromagnetic interference (EMI/EMS). Hardware Monitoring: On-board voltage / temperature / watchdog (WDT) circuit, combined with front panel PASS/FAIL/HALT LED indicators, provides real-time monitoring of the operating status. Power-on Self-Test (POST) quickly locates faults, and supports remote reset and fault alarm.

Vibration / Shock Resistance: Compliant with MIL-STD-810 standards, with 5g vibration and 50g shock, suitable for mobile harsh environments such as vehicle-mounted, airborne, and ship-mounted.

(6) Flexible Expansion and Redundancy Support

Expansion Bus: 32-bit PCI local bus, supporting PMC slots, capable of expanding network cards, serial port cards, motion control cards, etc.

Redundancy Configuration: Some models (such as XVME-660/716) support dual FCI redundant interfaces, with automatic switching between primary and hot standby, seamless fault transfer, ensuring continuous communication and control, suitable for high-availability systems.

III. Technical Specifications

Processor: Intel Pentium M 1.5GHz - 1.8GHz, 2MB L2 cache, low power consumption;

Memory: 256MB - 1GB DDR SDRAM, optional ECC;

Storage: EIDE/ATA interface (hard disk / SSD / CF), onboard Flash ROM;

Graphics: PCI VGA, 4MB video memory, up to 1280×1024;

Network: 2×10/100Mbps RJ-45 Ethernet;

Serial Port: 2×RS-232 DB9 (115.2kbps);

Other I/O: USB 1.1, EPP/ECP parallel port, PS/2, audio;

Bus: VME64x (A16/A24/A32, D32/D64), PCI-to-VME bridge;

Power Supply: +5V (VME bus power supply, typical 10W);

Operating Temperature: 0℃ - 55℃ (standard), -20℃ - 70℃ (wide temperature);

Size: Single slot 6U (160mm × 100mm);

Weight: Approximately 0.45kg.

IV. Typical Application Scenarios

Industrial Automation Master Controller: Production lines, process control, DCS system core controller, managing I/O and executing control logic;

High-speed Data Acquisition: Multi-channel analog/digital signal acquisition, processing, and storage, suitable for testing and measurement, equipment status monitoring;

Embedded Real-time System: Robots, CNC machines, aerospace, rail transportation, etc., requiring high real-time and reliable control units;

High Availability Redundant System: Key areas such as power, energy, transportation, requiring 7×24-hour uninterrupted operation of redundant control platforms;

Upgrade of Old VME Systems: Compatible with VME64x and legacy VME, low-cost replacement of old CPUs, protecting existing I/O investment.

V. Product Advantage Summary

XVME-660 has the core advantages of low-power high-performance Pentium M, high-speed VME64x bus, large-capacity ECC memory, dual network ports + multiple serial ports, industrial-grade wide temperature reinforcement, x86 software compatibility, balancing real-time performance, compatibility, and reliability. Compact single-slot design saves space, rich onboard interfaces eliminate the need for expansion cards, wide temperature and vibration compatibility for harsh environments, redundant options to meet high-availability requirements, making it an ideal choice for mid-to-high-end master control modules under the VME64x architecture, widely applicable to various industrial real-time control and embedded measurement control scenarios.