National Instruments 636 Series

X Series User Manual
© National Instruments | ix
Using an Analog Source ................................................................................... 6-8
Routing DI Start Trigger to an Output Terminal .............................................. 6-8
DI Reference Trigger Signal..................................................................................... 6-8
Using a Digital Source...................................................................................... 6-9
Using an Analog Source ................................................................................... 6-9
Routing DI Reference Trigger Signal to an Output Terminal .......................... 6-9
DI Pause Trigger Signal ........................................................................................... 6-10
Using a Digital Source...................................................................................... 6-10
Using an Analog Source ................................................................................... 6-10
Routing DI Pause Trigger Signal to an Output Terminal................................. 6-11
Digital Output Data Generation Methods......................................................................... 6-11
Software-Timed Generations.................................................................................... 6-11
Hardware-Timed Generations .................................................................................. 6-11
Digital Output Triggering................................................................................................. 6-12
Digital Waveform Generation .......................................................................................... 6-13
DO Sample Clock Signal.......................................................................................... 6-13
Using an Internal Source .................................................................................. 6-13
Using an External Source ................................................................................. 6-14
Routing DO Sample Clock to an Output Terminal .......................................... 6-14
Other Timing Requirements ............................................................................. 6-14
DO Sample Clock Timebase Signal ......................................................................... 6-15
DO Start Trigger Signal............................................................................................ 6-15
Retriggerable DO.............................................................................................. 6-15
Using a Digital Source...................................................................................... 6-16
Using an Analog Source ................................................................................... 6-16
Routing DO Start Trigger Signal to an Output Terminal ................................. 6-16
DO Pause Trigger Signal.......................................................................................... 6-16
Using a Digital Source...................................................................................... 6-17
Using an Analog Source ................................................................................... 6-18
Routing DO Pause Trigger Signal to an Output Terminal ............................... 6-18
I/O Protection ................................................................................................................... 6-18
Programmable Power-Up States....................................................................................... 6-18
DI Change Detection ........................................................................................................ 6-19
DI Change Detection Applications........................................................................... 6-20
Digital Filtering ................................................................................................................ 6-20
Watchdog Timer ....................................................................................................... 6-23
Connecting Digital I/O Signals......................................................................................... 6-24
Getting Started with DIO Applications in Software......................................................... 6-25