JYTEK USB-62401, Руководство пользователя

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40 Operation
Figure 3-12: Mode 2-Single Period Measurement
Mode 3: Single Pulse-Width Measurement
The counter calculates the pulse-width of the signal on GPTC_GATE
in terms of GPTC_CLK. Initial count can be loaded from the software
application. After software start, the counter calculates the number
of active edges on GPTC_CLK when GPTC_GATE is in its active state.
After the completion of the pulse-width interval on GPTC_GATE,
GPTC_OUT outputs high and current count value can be read by the
software application. Operation in which initial count = 0, count-up
mode is shown.
Figure 3-13: Mode 3-Single Pulse-Width Measurement
Mode 4: Single-Gated Pulse Generation
This mode generates a single pulse with programmable delay and
programmable pulse-width following software start. The two pro -
0 0 1 2 3 4 5 5 5
Gate
CLK
Count value
Software start
0 0 1 2 3 4 5 5 5
Gate
CLK
Count value
Software start