National Instruments 636 Series User Manual

© National Instruments | 7-1
7
Counters
X Series devices have 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 7-1 shows the X Series Counter 0 and the frequency generator. All
four counters on X Series devices are identical.
Figure 7-1. X Series 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 Pins
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 TimebaseFreq Out
Input Selection Muxes
Embedded Ctr0
FIFO
Counter 0 Sample Clock

National Instruments 636 Series Specifications

General

Brand	National Instruments
Model	636 Series
Category	Data Loggers
Language	English