National Instruments NI 6232, NI 6233 Chapter 8 PFI, Chapter 9 Isolation and Digital Isolators, Chapter 10 Digital Routing and Clock Generation

Contents
NI 6232/6233 User Manual xii ni.com
Prescaling ........................................................................................................ 7-34
Duplicate Count Prevention ............................................................................ 7-35
Duplicate Count Prevention Example .............................................. 7-35
Duplicate Count Example................................................................. 7-36
Example Application That Prevents Duplicate Count...................... 7-37
When To Use Duplicate Count Prevention ...................................... 7-38
Enabling Duplicate Count Prevention in NI-DAQmx...................... 7-38
Synchronization Modes................................................................................... 7-38
80 MHz Source Mode....................................................................... 7-39
Other Internal Source Mode ............................................................. 7-40
External Source Mode ...................................................................... 7-40
Chapter 8
PFI
Using PFI Terminals as Timing Input Signals .............................................................. 8-2
Exporting Timing Output Signals Using PFI Terminals............................................... 8-3
Using PFI Terminals as Static Digital Inputs and Outputs............................................ 8-3
Connecting PFI Input Signals........................................................................................ 8-3
PFI Filters ...................................................................................................................... 8-4
I/O Protection ................................................................................................................ 8-5
Programmable Power-Up States.................................................................................... 8-6
Connecting Digital I/O Signals ..................................................................................... 8-6
Chapter 9
Isolation and Digital Isolators
Digital Isolation............................................................................................................. 9-2
Benefits of an Isolated DAQ Device ............................................................................. 9-2
Chapter 10
Digital Routing and Clock Generation
Clock Routing................................................................................................................ 10-1
80 MHz Timebase........................................................................................... 10-2
20 MHz Timebase........................................................................................... 10-2
100 kHz Timebase .......................................................................................... 10-2
External Reference Clock ............................................................................... 10-2
10 MHz Reference Clock................................................................................ 10-3
Synchronizing Multiple Devices ................................................................................... 10-3
Real-Time System Integration Bus (RTSI) ................................................................... 10-3
RTSI Connector Pinout................................................................................... 10-4
Using RTSI as Outputs ................................................................................... 10-5