Contents
©
National Instruments
xi
X Series User Manual
DI Start Trigger Signal ....................................................................................6-8
Retriggerable DI................................................................................6-8
Using a Digital So
u
rce ......................................................................6-9
Using an Analog So
u
rce ...................................................................6-10
Ro
u
ting DI Start Trigger to an O
u
tp
u
t Terminal ..............................6-10
DI Reference Trigger Signal ...........................................................................6-10
Using a Digital So
u
rce ......................................................................6-11
Using an Analog So
u
rce ...................................................................6-12
Ro
u
ting DI Reference Trigger Signal to an O
u
tp
u
t Terminal ..........6-12
DI Pa
u
se Trigger Signal ..................................................................................6-12
Using a Digital So
u
rce ......................................................................6-13
Using an Analog So
u
rce ...................................................................6-13
Ro
u
ting DI Pa
u
se Trigger Signal to an O
u
tp
u
t Terminal .................6-13
Digital O
u
tp
u
t Data Generation Methods ......................................................................6-14
Software-Timed Generations...........................................................................6-14
Hardware-Timed Generations .........................................................................6-14
Digital O
u
tp
u
t Triggering ..............................................................................................6-16
Digital Waveform Generation .......................................................................................6-16
DO Sample Clock Signal.................................................................................6-17
Using an Internal So
u
rce...................................................................6-17
Using an External So
u
rce..................................................................6-17
Ro
u
ting DO Sample Clock to an O
u
tp
u
t Terminal...........................6-18
Other Timing Req
u
irements..............................................................6-18
DO Sample Clock Timebase Signal ................................................................6-18
DO Start Trigger Signal...................................................................................6-19
Retriggerable DO ..............................................................................6-19
Using a Digital So
u
rce ......................................................................6-20
Using an Analog So
u
rce ...................................................................6-20
Ro
u
ting DO Start Trigger Signal to an O
u
tp
u
t Terminal..................6-20
DO Pa
u
se Trigger Signal.................................................................................6-21
Using a Digital So
u
rce ......................................................................6-22
Using an Analog So
u
rce ...................................................................6-22
Ro
u
ting DO Pa
u
se Trigger Signal to an O
u
tp
u
t Terminal................6-22
I/O Protection.................................................................................................................6-23
Programmable Power-Up States ....................................................................................6-23
DI Change Detection .....................................................................................................6-24
DI Change Detection Applications..................................................................6-25
Digital Filtering..............................................................................................................6-25
Watchdog Timer..............................................................................................6-28
Connecting Digital I/O Signals......................................................................................6-29
Getting Started with DIO Applications in Software ......................................................6-30
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