Glossary
Getting Started with Your VXIpc-850 G-4 © National Instruments Corporation
F
fair requester A VXIbus device that will not arbitrate for the VXIbus after
releasing it until it detects the bus request signal inactive. This
ensures that all requesting devices will be granted use of the bus.
H
hex Hexadecimal; the numbering system with base 16, using the
digits 0 to 9 and letters A to F.
Hz hertz; cycles per second
I
IEEE Institute of Electrical and Electronics Engineers
I/O input/output; the techniques, media, and devices used to achieve
communication between machines and users.
interrupt A means for a device to request service from another device.
interrupt handler A VMEbus functional module that detects interrupt requests
generated by interrupters and responds to those requests by
requesting status and identify information.
interrupt level The relative priority at which a device can interrupt.
IRQ* Interrupt signal
K
KB kilobytes of memory
L
logical address An 8-bit number that uniquely identifies each VXIbus device in
a system. It defines the A16 register address of a device, and
indicates Commander and Servant relationships.