Chapter 6
Digital I/O
©
National Instruments
6-21
X Series User Manual
DO Pause Trigger Signal
Use the DO Pa
u
se Trigger (do/Pa
u
seTrigger) signal to mask off samples in
a DAQ seq
u
ence. That is, when DO Pa
u
se Trigger is active, no samples
occ
u
r.
DO Pa
u
se Trigger does not stop a sample that is in progress. The pa
u
se does
not take effect
u
ntil the beginning of the next sample.
When yo
u
generate digital o
u
tp
u
t signals, the generation pa
u
ses as soon as
the pa
u
se trigger is asserted. If the so
u
rce of yo
u
r sample clock is the
onboard clock, the generation res
u
mes as soon as the pa
u
se trigger is
deasserted, as shown in Fig
u
re 6-9.
Figure 6-9.
DO Pause Trigger with the Onboard Clock Source
If yo
u
are
u
sing any signal other than the onboard clock as the so
u
rce of
yo
u
r sample clock, the generation res
u
mes as soon as the pa
u
se trigger is
deasserted and another edge of the sample clock is received, as shown in
Fig
u
re 6-10.
Figure 6-10.
DO Pause Trigger with Other Signal Source
P
aus
e Trigger
Sa
mple Clock
P
aus
e Trigger
Sa
mple Clock
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