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Chapter 8 PFI
Using PFI Terminals as Timing Input Signals
Use PFI terminals to route external timing signals to many different X Series functions. Each
PFI terminal can be routed to any of the following signals:
• (NI 632x/634x/6351/6353/6355/6361/6363/6365/6375 Devices) AI Convert Clock
(ai/ConvertClock)
• AI Sample Clock (ai/SampleClock)
• AI Start Trigger (ai/StartTrigger)
• AI Reference Trigger (ai/ReferenceTrigger)
• AI Pause Trigger (ai/PauseTrigger)
• AI Sample Clock Timebase (ai/SampleClockTimebase)
• AO Start Trigger (ao/StartTrigger)
• AO Sample Clock (ao/SampleClock)
• AO Sample Clock Timebase (ao/SampleClockTimebase)
• AO Pause Trigger (ao/PauseTrigger)
• Counter input signals for all counters—Source, Gate, Aux, HW_Arm, A, B, Z
• Counter n Sample Clock
• DI Sample Clock (di/SampleClock)
• DI Sample Clock Timebase (di/SampleClockTimebase)
• DI Reference Trigger (di/ReferenceTrigger)
• DO Sample Clock (do/SampleClock)
Most functions allow you to configure the polarity of PFI inputs and whether the input is edge
or level sensitive.
Note (NI PXIe-6386/6396 Devices) PXIe-6386 and PXIe-6396 devices differ in
several ways from other SMIO devices. For more information about sample clock
rates related to these devices, go to
ni.com/info and enter the Info Code
smio14ms.
Exporting Timing Output Signals Using PFI
Ter m i n als
You can route any of the following timing signals to any PFI terminal configured as an output:
•
(NI 632x/634x/6351/6353/6355/6361/6363/6365/6375 Devices) AI Convert Clock
*
(ai/ConvertClock)
• AI Hold Complete Event (ai/HoldCompleteEvent)
• AI Reference Trigger (ai/ReferenceTrigger)
• AI Sample Clock (ai/SampleClock)
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