Acromag / Xembedded / Xycom XVME-654 VMEbus Processor Module

The XVME-654 is a VMEbus processor module that combines PC/AT compatibility with industrial-grade VMEbus architecture for real-time control, data acquisition, and embedded computing tasks. Built around an AM5x86 processor, this module delivers deterministic performance in demanding environments where standard computing platforms cannot operate reliably.

Technical Specifications

• Processor: AM5x86 running at 133 MHz with 33 MHz external bus


• Cache: 16 KB unified write-back cache


• Memory: Supports 4 MB, 8 MB, 16 MB, and 32 MB EDO DRAM configurations


• Graphics: PCI Local Bus SVGA controller, up to 1024 × 768 resolution


• Storage Interface: Integrated PCI Enhanced IDE controller

Key Features

• Full DMA capability to and from the VMEbus enables high-throughput data transfers without CPU intervention.


• Integral FIFOs for posted writes optimize write performance and reduce bus contention.


• Block mode transfers and read-modify-write operations support complex data manipulation protocols.


• Four independent master and four slave images allow flexible mapping of VMEbus resources into local memory space.


• PCI local bus architecture bridges the processor to VMEbus with deterministic latency characteristics.

Typical Applications The XVME-654 serves industrial process control systems, military/aerospace data acquisition platforms, telecommunications switching equipment, and legacy VMEbus system upgrades where PC/AT software compatibility accelerates deployment.

Compatibility & Integration Compliant with VMEbus standards, the module integrates directly into existing VMEbus backplane systems. PC/AT software compatibility enables use of established embedded applications without porting overhead. The integrated SVGA and IDE controllers eliminate the need for separate graphics and storage interface modules in many configurations.