National Instruments VXIpc-871-700, User Manual

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Glossary
VXIpc 870 Series User Manual G-2 www.ni.com
address space a set of 2
n
memory locations differentiated from other such sets in
VXI/VMEbus systems by six addressing lines known as address modifiers.
n is the number of address lines required to uniquely specify a byte location
in a given space. Valid numbers for n are 16, 24, and 32. In VME/VXI,
because there are six address modifiers, there are 64 possible address
spaces.
ANSI American National Standards Institute
API Application Programming Interface; the direct interface that an end user
sees when creating an application
ASD Acceleration Spectral Density; a calculation of random vibration intensity
across a frequency bandwidth
ASIC application-specific integrated circuit — a proprietary semiconductor
component designed and manufactured to perform a set of specific
functions for a specific customer
B
b bit — one binary digit, either 0 or 1
B byte — eight related bits of data, an 8-bit binary number. Also used to denote
the amount of memory required to store one byte of data.
backplane an assembly, typically a printed circuit board, with 96-pin connectors and
signal paths that bus the connector pins. A C-size VXIbus system will have
two sets of bused connectors called J1 and J2. A D-size VXIbus system will
have three sets of bused connectors called J1, J2, and J3.
BERR* bus error signal
BIOS Basic Input/Output System. BIOS functions are the fundamental level
of any PC or compatible computer. BIOS functions embody the basic
operations needed for successful use of the computer
’ s hardware resources.
bus the group of conductors that interconnect individual circuitry in a computer.
Typically, a bus is the expansion vehicle to which I/O or other devices are
connected. Examples of buses include the ISA bus, PCI bus, VXI bus, and
VME bus.