Acromag / Xembedded / Xycom XVME-682 I/O Module

The Acromag/Xembedded/Xycom XVME-682 is a dual-card, 6U VMEbus module pairing a CPU board with a dedicated I/O module. This architecture enables direct inter-board communication via local bus when installed adjacently, bypassing VMEbus for reduced latency. The system ships in 1 MB or 4 MB RAM configurations and routes PC/AT and PC/XT signals either through a local connector (adjacent slots) or the VMEbus P2 backplane (non-adjacent slots).

The I/O module interfaces graphics control via PC/XT bus and disk management through full PC/AT bus signaling accessible at the P2 connector. Both VMEbus P1 and P2 backplanes are mandatory for power delivery and normal operation.

Technical Specifications

• Form Factor: 6U VMEbus compatible


• Architecture: Two-card system (CPU module + I/O module)


• Memory: 1 MB RAM or 4 MB RAM options


• VMEbus Connectors: P1 (primary VMEbus signals), P2 (PC/XT and PC/AT bus signals)


• Local Bus: Shared PC/AT signal routing between CPU and I/O boards in adjacent slot configuration


• I/O Module Bus Requirements: PC/XT for graphics controller; full PC/AT for disk controller


• Power: Requires both P1 and P2 VMEbus backplanes


• Operating Temperature Range: 0 to 70 °C (standard); -40 to 75 °C (extended temperature models)


• Storage Temperature Range: -55 to 85 °C


• Humidity: 5% to 95% relative humidity, non-condensing

Key Features

• Local connector for efficient CPU-to-I/O communication in adjacent slot installations


• Flexible board spacing with P2 backplane signal routing for non-adjacent configurations


• Dual memory configurations support varied application memory footprints


• Integrated graphics and disk control via distinct bus protocols


• Modular design permits status LED monitoring and multi-serial port expansion

Compatibility & Integration Full VMEbus compliance with A32/A24/A16 addressing and D32 data paths. Supports VxWorks, Linux, and Windows on the CPU module. Front panel provides dual serial ports (COM1, COM2), keyboard connector, speaker jack, and status indicators. Additional serial interfaces available through rear transition modules.