Acromag / Xembedded / Xycom XVME-103 RAM/ROM/Flash Memory Module

The XVME-103 is a single-high VMEbus memory module that provides flexible, independently configurable storage for industrial embedded systems. It accommodates eight 32-pin JEDEC sockets organized into two memory banks, each with four sites, supporting RAM, ROM, EPROM (to 8 MB), Flash (to 4 MB), and EEPROM (to 4 MB) devices. On-board battery backup protects CMOS RAM and Real-Time Clock data during power loss, while integrated power monitoring prevents memory access when supply voltage drops below 4.75 VDC.

The module optionally asserts SYSREST or SYSFAIL signals based on backup voltage status. Devices within each bank must match in type and speed; Read-Modify-Write cycles are supported. Front panel LEDs indicate bank activity and battery status.

Configuration is user-selectable via jumpers and switches. The XVME-103 draws power and ground from the VMEbus P1 connector and control signals from P2.

Technical Specifications

• Memory Support: RAM, ROM, EPROM (to 8 MB), Flash (to 4 MB), EEPROM (to 4 MB)


• Memory Sockets: Eight 32-pin JEDEC


• Memory Banks: Two independent banks, four sites each


• Data Transfer: Read-Modify-Write cycles supported


• Power Monitoring Threshold: 4.75 VDC (prevents memory access; optional SYSREST/SYSFAIL assertion)


• Battery Backup: On-board circuit for CMOS RAM and Real-Time Clock


• Operating Temperature: 0°C to 50°C


• Storage Temperature: -40°C to 60°C


• Humidity: 20% to 80% RH, non-condensing


• Form Factor: Single-high VMEbus module

Key Features

• Dual independent memory banks allow heterogeneous device configurations


• Power monitoring checks backup voltage during power-up


• Prevents memory corruption via power-down protection


• Front panel activity LEDs for each bank plus battery-low indicator


• User-configurable via on-board jumpers and switches

Compatibility & Integration

• VMEbus P1 and P2 connector interface


• Compatible with standard VMEbus systems


• Supports industry-standard 32-pin JEDEC devices