National Instruments cDAQ-9133 User Manual

© National Instruments | 5-1
5
Counters
The cDAQ controller has four general-purpose 32-bit counter/timers and one frequency
generator. The general-purpose counter/timers can be used for many measurement and pulse
generation applications. Figure 5-1 shows the cDAQ controller Counter 0 and the frequency
generator. All four counters on the cDAQ controller are identical.
Figure 5-1. cDAQ Controller Counter 0 and Frequency Generator
Counters have eight input signals, although in most applications only a few inputs are used.
For information about connecting counter signals, refer to the Default Counter/Timer Routing
section.
Each counter has a FIFO that can be used for buffered acquisition and generation. Each counter
also contains an embedded counter (Embedded Ctrn) for use in what are traditionally
two-counter measurements and generations. The embedded counters cannot be programmed
independent of the main counter; signals from the embedded counters are not routable.
Counter 0
Counter 0 Source (Counter 0 Timebase)
Counter 0 Aux
Counter 0 HW Arm
Counter 0 A
Counter 0 B (Counter 0 Up_Down)
Counter 0 Z
Counter 0 Gate
Counter 0 Internal Output
Counter 0 TC
Input Selection Muxes
Frequency Generator
Frequency Output Timebase
Freq Out
Input Selection Muxes
Embedded Ctr0
FIFO
Counter 0 Sample Clock

National Instruments cDAQ-9133 Specifications

General

Brand	National Instruments
Model	cDAQ-9133
Category	Controller
Language	English