Glossary
VXIpc 800/700 Series User Manual
Glossary-2
©
National Instruments Corporation
B
b
bits
B
bytes
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.
C
CLK10
A 10 MHz, ±100 ppm, individually buffered (to each module slot),
differential ECL system clock that is sourced from Slot 0 of a VXIbus
mainframe and distributed to Slots 1 through 12 on P2. It is distributed
to each slot as a single-source, single-destination signal with a matched
delay of under 8 ns.
CMOS
Complementary Metal Oxide Semiconductor; a process used in making
chips
D
DIN
Deutsches Institut für Normung—German Standards Institute
DMA
Direct Memory Access; a method by which data is transferred between
devices and internal memory without intervention of the central
processing unit
DRAM
Dynamic RAM (Random Access Memory); storage that the computer
must refresh at frequent intervals