VME

The Uses of VME
VME bus is used in a wide variety of VME applications. In many cases, the VME bus system design has been tailored to support specialized applications, especially in rugged environments, as well. Some of the most popular VME applications include industrial controls; the Military; Aerospace; Transportation; Telecom; Simulation; Medical; High Energy Physics; and general business.

The VME Architecture
VME bus uses a VME master-slave architecture. Functional modules called VME masters transfer data to and from functional modules called slaves. Since many VME masters can reside on the bus it is called a multiprocessing bus. Before a bus master can transfer data it must first acquire the VME bus using a central arbiter. This VME bus arbiter is part of a module called the VME bus system controller. The system controller's function is to determine which master gets access to the bus. All activity takes place on five VME sub-buses. These are called the VME Data Transfer Bus, the VME Data Transfer Arbitration Bus, the VME Priority Interrupt Bus, the VME Utility bus and the VME Serial Bus.

Symmetricom's VME Bus Modules

• Symmetricom's VME/VXI boards are compatible with 6U high systems.
• Symmetricom's VME/VXI boards support applications in rugged environments.
• Symmetricom's VME/VXI product offerings include a ruggedized configuration specifically tailored to support rugged, high vibration environments.
• Symmetricom's VME/VXI boards provide precision time and frequency reference to the host computer and peripheral data acquisition systems. Time is acquired from either the GPS satellites or using supplied signals, typically IRIG B.