Contents
X Series User Manual
xiv
ni.com
Other Co
u
nter Feat
u
res.................................................................................................. 7-51
Cascading Co
u
nters......................................................................................... 7-51
Prescaling ........................................................................................................ 7-51
Synchronization Modes................................................................................... 7-52
100 MHz So
u
rce Mode..................................................................... 7-52
External So
u
rce Greater than 25 MHz.............................................. 7-52
External or Internal So
u
rce Less than 25 MHz ................................ 7-53
Chapter 8
PFI
Using PFI Terminals as Timing Inp
u
t Signals .............................................................. 8-2
Exporting Timing O
u
tp
u
t Signals Using PFI Terminals ............................................... 8-3
Using PFI Terminals as Static Digital I/Os ................................................................... 8-4
Using PFI Terminals to Digital Detection Events......................................................... 8-4
Connecting PFI Inp
u
t Signals........................................................................................ 8-4
PFI Filters ...................................................................................................................... 8-5
I/O Protection ................................................................................................................ 8-7
Programmable Power-Up States.................................................................................... 8-7
Chapter 9
Digital Routing and Clock Generation
Clock Ro
u
ting................................................................................................................ 9-1
100 MHz Timebase ......................................................................................... 9-2
20 MHz Timebase ........................................................................................... 9-2
100 kHz Timebase .......................................................................................... 9-2
External Reference Clock ............................................................................... 9-2
10 MHz Reference Clock................................................................................ 9-3
Synchronizing M
u
ltiple Devices ................................................................................... 9-3
PXI Express Devices....................................................................................... 9-3
PCI Express Devices ....................................................................................... 9-3
USB Devices ................................................................................................... 9-4
Real-Time System Integration (RTSI) .......................................................................... 9-4
RTSI Connector Pino
u
t ................................................................................... 9-5
Using RTSI as O
u
tp
u
ts ................................................................................... 9-6
Using RTSI Terminals as Timing Inp
u
t Signals ............................................. 9-7
RTSI Filters..................................................................................................... 9-7
PXI and PXI Express Clock and Trigger Signals.......................................................... 9-8
PXIe_CLK100 ................................................................................................ 9-8
PXIe_SYNC100.............................................................................................. 9-8
PXI_CLK10 .................................................................................................... 9-8
PXI Triggers.................................................................................................... 9-8
PXI_STAR Trigger ......................................................................................... 9-9
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