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© National Instruments Corporation Index-15 Lab-NB User Manual
general-purpose timing signal
connections, 2-21 to 2-24
event-counting application with
external switch gating
(figure), 2-22
frequency measurement application
(figure), 2-23
requirements for GATE and CLK
and OUT signals (figure), 2-24
timing I/O circuitry, 3-10 to 3-11
block diagram, 3-10
counter block diagram, 3-11
timing I/O specifications, A-3
timing specifications, digital I/O signal
connections, 2-12 to 2-13
mode 1 input timing, 2-14
mode 1 output timing, 2-15
mode 2 bidirectional timing, 2-16
TIMRINTCLR bit
installing interrupt service routine, 4-55
TMRINTEN bit
controlling EXTUPDATE* signal, 2-19
description, 4-31 to 4-32
*TMRINTEN bit, 4-33
TMRINTUP bit, 2-20
TMRWGEN bit
controlling EXTUPDATE* signal, 2-19
DAC voltage updating, 3-8
TMRWGN0 bit
description, 4-14
interrupt programming of analog output
circuitry, 4-54
programming analog output
circuitry, 4-52
TMRWGN1 bit
description, 4-14
interrupt programming of analog output
circuitry, 4-54
programming analog output
circuitry, 4-52
TWOSCMP bit
description, 4-8
setting for A/D conversion result, 4-38
TWOSDA0 bit, 4-14
TWOSDA1 bit, 4-14
U
unipolar analog input
calibration procedure
gain calibration, 5-5
offset calibration, 5-5
selection, 2-4
signal range versus gain (figure), 3-7
unipolar analog output
analog output voltage versus digital code
calculating, 4-53
straight binary coding (table), 4-53
calibration procedure
adjusting analog output gain, 5-8
adjusting analog output offset, 5-7
to 5-8
unpacking the Lab-NB, 1-5
W
WR* signal
description (table), 2-13
mode 1 output timing, 2-15
mode 2 bidirectional timing, 2-16