Xycom XVME-630 68030

The XVME‑630 is a low-cost VMEbus-compatible single-board computer launched by Xycom (now a subsidiary of Acromag). It is powered by a 25 MHz 68EC030 (68030-compatible) processor as its core. Designed for industrial control, data acquisition, and embedded systems that require compact and reliable computing in VME environments, this module offers extensive I/O and storage expansion capabilities.

Key Technical Specifications

• CPU: 68030, up to 25 MHz (30 MHz optional)
• Memory Slots: 12 × 32-pin sites, supporting a combination of EPROM, SRAM, and Flash (up to 4 MB per site)
• On-board Peripherals:Power Supply: VMEbus standard 5 V/±12 V, supporting external power redundancy
  • Two RS‑232 serial ports (asynchronous/synchronous)
  • 68882 floating-point coprocessor (optional)
  • Real-time clock (with battery backup)
  • On-chip interrupt controller
• Operating Temperature: -40 ℃ ~ +85 ℃ (industrial grade)
• Dimensions: 3U VME chassis (approximately 100 mm × 233 mm)

Product Features

• Cost-effectiveness: Adopts the mature 68030 core, featuring low cost and low power consumption.
• Flexible Storage: 12 universal storage sites allow free combination of EPROM, SRAM, and Flash to meet different capacity requirements.
• Rich I/O: Dual serial ports, optional floating-point coprocessor, and on-board clock, compatible with various industrial protocols.
• Reliability: Complies with VMEbus standard electrical and mechanical specifications, with a wide operating temperature range and battery-backed clock.
• Easy Integration: Standard 3U form factor, which can be directly inserted into the VME backplane without additional heat dissipation or power supply design.

Structure and Composition

• CPU Module: 68030 processor and on-chip bus bridge chip.
• Storage Sub-board: 12 32-pin slots, equipped with address decoding logic.
• I/O Subsystem: Includes two RS‑232C controllers, an optional 68882 floating-point coprocessor, and an interrupt controller.
• Clock and Power Management: On-board real-time clock chip, backup battery holder, and VMEbus power filtering and monitoring circuits.
• Mechanical Structure: 3U VME rack card, with gold fingers on both front and rear for backplane connection.

Typical Application Areas

• Industrial automation controllers
• Data acquisition and monitoring systems
• Real-time signal processing (requiring floating-point operations)
• Fieldbus gateways (e.g., serial port to VME)
• Embedded test and measurement instruments

Installation and Maintenance Guidelines

1. Plug-in/Unplug Notes: Perform card insertion or removal only after turning off the VME backplane power to prevent transient current from damaging the chip.
2. Power Supply Check: Verify that the 5 V and ±12 V voltages provided by the backplane meet the specifications. Use an external regulated power supply for redundancy if necessary.
3. Heat Dissipation Management: The 68030 itself has low power consumption, so heat dissipation from a standard VME chassis is sufficient. For operation in high-temperature environments (>70 ℃), it is recommended to install additional fans or heat sinks.
4. Storage Configuration: Insert an appropriate combination of EPROM/Flash (for firmware) and SRAM (for runtime data) into the 12 sites according to system requirements, and correctly map the addresses in the BIOS/boot code.
5. Clock Maintenance: The battery for the battery-backed real-time clock needs to be replaced every 2-3 years to ensure the reliability of timestamp and timing functions.
6. Firmware Upgrade: Download new firmware via VMEbus or serial port. Be sure to back up the existing image before upgrading to prevent system unbootability due to upgrade failure.

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