Glossary
VXI-MXI-Express Series User Manual
Glossary-6
ni.com
interrupt level
The relative priority at which a device can interrupt.
IRQ*
interrupt signal
K
K
kilo—the prefix for 1,024, or 2
10
, used with B (byte) in quantifying data or
computer memory.
k
kilo—the standard metric prefix for 1,000, or 10
3
, used with units of
measure such as volts, hertz, and meters.
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.
M
m
meters
M
mega—(1) the standard metric prefix for 1 million or 10
6
, when used with
units of measure such as volts and hertz; (2) the prefix for 1,048,576, or 2
20
,
when used with B (byte) to quantify data or computer memory.
master
A functional part of a VME/VXIbus device that initiates data transfers on
the backplane. A transfer can be either a read or a write.
message-based
device
An intelligent device that implements the defined VXIbus registers and
communication protocols. These devices are able to use Word Serial
Protocol to communicate with one another through communication
registers.
MODID
Module ID lines—used in VXI to geographically locate boards and to
dynamically configure boards.
MTBF
Mean Time Between Failure
