Operation & Calibration
37
Decrease of the counter value in Edge Separation Measurement mode is
shown.
Figure 3-22: Mode 9-Edge Separation Measurement
Mode 10: PWM Output
The USB-61210 timer/counter can also simulate a PWM (Pulse Width
Modulation) output. The PWM starts to generate output following a
GPTC_GATE edge trigger or being activated/inactivated by the
GPTC_GATE high/low logic control. By setting a varying amount of
Pulse_initial_cnt and Pulse_length_cnt, varying pulse frequencies
(Fpwm) and duty cycles (Dutypwm) can be obtained. PWM output is
shown.
Figure 3-23: Mode 10-PWM Output Following Trigger
Figure 3-24: Mode 10-PWM Output Following GATE Control
Calculation of the PWM frequency and duty cycle is as follows.
1 3
1 3
1 2
1 1
9
8
7
6
S o f t w a r e s t a r t
5
4
3
2
1
1
1
1
1
1
G a t e
C L K
A U X
C o u n t v a l u e
1 0
TIMEBASE
PWMOUT
Pulse_Initial_cnt= 0x7
Gate
Pulse_Length_cnt= 0xB
Software Start
TIMEBASE
PWMOUT
Pulse_Initial_cnt= 0x7
Gate
Pulse_Length_cnt= 0xB
Software Start
Summary of Contents for USB-61210
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Page 10: ...x List of Tables This page intentionally left blank...
Page 15: ...Introduction 5 Figure 1 2 USB 61210 Module Side View...
Page 16: ...6 Introduction Figure 1 3 USB 61210 Module Front View...
Page 19: ...Introduction 9 Figure 1 7 Module Stand Top View 20 4 20 4 B 26...
Page 50: ...40 Operation Calibration...
Page 56: ...46 Getting Service...
