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Glossary
VXI-MXI User Manual
Glossary-6
© National Instruments Corporation
I
IACK
Interrupt Acknowledge
IC
Integrated Circuit
IEEE
Institute of Electrical and Electronics Engineers
IEEE 1014
The VME specification.
in.
inches
I/O
input/output; the techniques, media, and devices used to achieve
communication between entities.
Interlocked Contrasted
with
Normal Operating Mode; an optional mode of operation
Arbitration Mode
in which the system performs as one large VXIbus mainframe with only
one master of the entire system (VXIbus and MXIbus) at any given
moment. In this mode there is no chance for a deadlock situation.
Interrupt
A means for a device to request service from another device.
Interrupt Handler
A functional module that detects interrupt requests generated by
interrupters and performs appropriate actions.
Interrupter
A device capable of asserting interrupts and responding to an interrupt
acknowledge cycle.
INTX
Interrupt and Timing Extension; a daughter card option that plugs into the
two daughter card connectors on the VXI-MXI. It extendes the seven
VMEbus interrupt lines, the eight VXIbus TTL trigger lines, the VXIbus
CLK10 signal, and the VMEbus reset signals SYSRESET*, SYSFAIL*,
and ACFAIL*.
ISA
Industry Standard Architecture
K
KB
kilobytes of memory
L
Latch
To sample a signal and remember its value.
LED
light-emitting diode
Logical Address
An 8-bit number that uniquely identifies the location of a VXIbus device's
configuration registers in a system. The A16 base address of a device is
C000h + Logical Address * 40h.
LSB
Least Significant Bit (bit 0)