Index
© National Instruments Corporation Index-7 Lab-NB User Manual
programming example, 4-63
mode 2 bidirectional bus
control words, 4-63
Port C pin assignments (figure), 4-64
Port C status-word bit
definitions, 4-64
programming example, 4-65
register descriptions and programming
examples, 4-57 to 4-65
single bit set/reset control words, 4-65
digital I/O signal connections, 2-10 to 2-16
digital input specifications, 2-10
digital output specifications, 2-10
mode 1 input timing, 2-14
mode 1 output timing, 2-15
mode 2 bidirectional timing, 2-16
Port C pin connections, 2-11 to 2-12
signals for (table), 2-13
timing specifications, 2-12 to 2-13
typical digital I/O applications
(figure), 2-11
digital I/O specifications, A-3
digital-to-analog converter. See DAC
(digital-to-analog converter).
documentation
conventions used in manual, xii
National Instruments
documentation, xii-xiii
organization of manual, xi-xii
related documentation, xiii
E
environment specifications, A-4
equipment, optional, 1-4 to 1-5
event counting, 2-21
application with external switch gating
(figure), 2-22
EXTCONV* signal
DAQ timing connections, 2-17 to 2-18
description (table), 2-7
initiating multiple A/D conversions, 4-
46
multiple A/D conversions using external
timing
controlled acquisition mode
posttrigger mode, 4-46 to 4-48
pretrigger mode, 4-49 to 4-50
freerun acquisition mode
posttrigger mode, 4-51
posttrigger DAQ timing (figure)
EXTCONV* high when trigger
sensed, 2-18
EXTCONV* low when trigger
sensed, 2-18
specifications and ratings, 2-20 to 2-21
timing requirements for EXTCONV*
input (figure), 2-17
triggering conversions, 2-7 to 2-8
external timing for multiple A/D
conversions. See multiple A/D
conversions, programming.
EXTTRIG signal
DAQ timing connections, 2-17 to 2-19
description (table), 2-7
initiating multiple A/D conversion DAQ
operation (posttrigger mode), 4-45
multiple A/D conversions using external
timing
controlled acquisition mode
posttrigger mode, 4-46 to 4-48
pretrigger mode, 4-49 to 4-50
freerun acquisition mode
pretrigger mode, 4-51
specifications and ratings, 2-20 to 2-21
terminating multiple A/D conversion
DAQ operation (pretrigger
mode), 4-46
EXTTRIGEN bit
controlling EXTTRIG signal, 2-17, 2-19
description, 4-6
initiating multiple A/D conversion DAQ
operation using EXTCONV*, 4-46
multiple A/D conversion DAQ operation
using EXTTRIG, 4-45
selecting posttrigger mode, 4-47
selecting pretrigger mode, 4-49
terminating multiple A/D conversion
DAQ operation using EXTTRIG, 4-46
EXTUPDATE* signal
DAQ timing connections, 2-19 to 2-21
description (table), 2-7
interrupt programming of analog output
circuitry, 4-54 to 4-55
NuBus interrupt generation
(figure), 2-20