62
Operation
4.8.7
Mode 7: Single-Triggered Continuous Pulse Generation
This mode is similar to Mode 5 except that the counter generates contin-
uous periodic pulses with programmable pulse interval and pulse-width
following the first active edge of GPTC_GATE. When the first
GPTC_GATE edge triggers the counter, GPTC_GATE has no effect until
software start is executed again. Generation of two pulses with a pulse
delay of four and a pulse-width of three is shown.
Figure 4-24: Mode 7-Single-Triggered Continuous Pulse
4.8.8
Mode 8: Continuous Gated Pulse Generation
This mode generates periodic pulses with programmable pulse interval
and pulse-width following software start. GPTC_GATE enables/disables
calculation. When GPTC_GATE is inactive, the counter halts the current
count value. Generation of two pulses with a pulse delay of four and a
pulse-width of three is shown.
Figure 4-25: Mode 8-Continuous Gated Pulse
4.8.9
Mode 9: Edge Separation Measurement
Measures the time differentiation between two different pulse signals.
The first pulse signal is connected to GPTC_GATE and the second signal
is connected to GPTC_AUX. Clocks that pass between the rising edge
signal of two different pulses through the 40 MHz internal clock or exter-
nal clock are calculated. You can calculate the time period via the known
4
4
4
3
2
1
0
2
1
S o f t w a r e s t a r t
0
3
2
1
0
2
1
0
3
2
G a t e
C L K
C o u n t v a l u e
O U T
4
4
3
3
2
1
0
2
1
S o f t w a r e s t a r t
0
3
2
1
0
2
1
1
0
3
G a t e
C L K
C o u n t v a l u e
O U T
Summary of Contents for USB-1901
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Page 26: ...12 Hardware Information Figure 2 2 USB 1902 Module Side View...
Page 27: ...Hardware Information 13 USB 1900 Series Figure 2 3 USB 1902 Module Front View 41 3 114...
Page 29: ...Hardware Information 15 USB 1900 Series Figure 2 6 Module in Stand Front View 114 3...
Page 30: ...16 Hardware Information Figure 2 7 Module Stand Top View 20 4 20 4 B 26...
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