National Instruments PCI-6251 User Manual

© National Instruments | 7-1
7
Counters
M Series devices have two general-purpose 32-bit counter/timers and one frequency generator,
as shown in Figure 7-1. The general-purpose counter/timers can be used for many measurement
and pulse generation applications.
Figure 7-1. M Series Counter0 and Frequency Generator
The counters have seven input signals, although in most applications only a few inputs are used.
For information about connecting counter signals, refer to the
Default Counter/Timer Pinouts
section.
Counter Input Applications
The following sections list the various counter input applications available on M Series devices:
•
Counting Edges
• Pulse-Width Measurement
• Period Measurement
• Semi-Period Measurement
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
Counter 0 Sample Clock

National Instruments PCI-6251 Specifications

General

Brand	National Instruments
Model	PCI-6251
Category	I/O Systems
Language	English