National Instruments NI-488.2 Benutzerhandbuch
Glossary
G-6
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N
NDAC
Not Data Accepted. One of the three GPIB handshake lines. See handshake.
NRFD
Not Ready For Data. One of the three GPIB handshake lines.
See handshake.
See handshake.
P
parallel poll
The process of polling all configured devices at once and reading a
composite poll response. See serial poll.
composite poll response. See serial poll.
PC
Personal computer.
PCI
Peripheral Component Interconnect.
PIO
See programmed I/O.
PPC
Parallel Poll Configure. The GPIB command used to configure an
addressed Listener to participate in polls.
addressed Listener to participate in polls.
PPD
Parallel Poll Disable. The GPIB command used to disable a configured
device from participating in polls. There are 16 PPD commands.
device from participating in polls. There are 16 PPD commands.
PPE
Parallel Poll Enable. The GPIB command used to enable a configured
device to participate in polls and to assign a DIO response line. There
are 16 PPE commands.
device to participate in polls and to assign a DIO response line. There
are 16 PPE commands.
PPU
Parallel Poll Unconfigure. The GPIB command used to disable used to
disable any device from participating in polls.
disable any device from participating in polls.
programmed I/O
Low-speed data transfer between the GPIB interface and memory in
which the CPU moves each data byte according to program instructions.
See DMA.
which the CPU moves each data byte according to program instructions.
See DMA.
R
resynchronize
The GPIB software and the user application must resynchronize after
asynchronous I/O operations have completed.
asynchronous I/O operations have completed.
RQS
Request Service.