ADLINK Technology USB-1901, Руководство пользователя

Страница: 74 / 84

60 Operation
Figure 4-20: Mode 3-Single Pulse-Width Measurement
4.8.4 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-
grammable parameters can be specified in terms of periods of the
GPTC_CLK input by the software application. GPTC_GATE
enables/disables calculation. When GPTC_GATE is inactive, the
counter halts the current count value. Generation of a single pulse
with a pulse delay of two and a pulse-width of four is shown.
Figure 4-21: Mode 4-Single-Gated Pulse
4.8.5 Mode 5: Single-Triggered Pulse
This mode generates a single pulse with programmable delay and
programmable pulse-width following an active GPTC_GATE edge.
These programmable parameters can be specified in terms of
0 0 1 2 3 4 5 5 5
Gate
CLK
Count value
Software start
2 2 1 0 3 2 2 1 0
Gate
CLK
Count value
OUT
Software start