National Instruments NI USB-621x - Manual (Page 81)

© National Instruments Corporation 9-1 NI USB-621x User Manual
9
Counters
M Series devices have two general-purpose 32-bit counter/timers and one
frequency generator, as shown in Figure 9-1. The general-purpose
counter/timers can be used for many measurement and pulse generation
applications.
Figure 9-1. M Series Counters
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
Counter 1
Counter 1 Source (Counter 1 Timebase)
Counter 1 Aux
Counter 1 HW Arm
Counter 1 A
Counter 1 B (Counter 1 Up_Down)
Counter 1 Z
Counter 1 Gate
Counter 0 Internal Output
Counter 0 TC
Input Selection Muxes