National Instruments 320174B-01 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

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

WR* signal

description (table), 2-13
mode 1 output timing, 2-15
mode 2 bidirectional timing, 2-16