Data Translation DT9834 Series, User Manual

Page: 104 / 186

Chapter 5
104
Make sure that the signals are wired appropriately. Refer to page 61 for an example of
connecting a one-shot application.
Repetitive One-Shot
Use repetitive one-shot mode to generate a pulse output signal from the Counter n Out line
whenever the specified edge is detected on the Counter n Gate signal. You can use this mode
to clean up a poor clock input signal by changing its pulse width, and then outputting it.
The module continues to output pulses until you stop the operation. Note that any Counter n
Gate signals that occur while the pulse is being output are not detected by the module.
The period of the output pulse is determined by the C/T clock source (either internal using a
clock divider, or external). Note that in repetitive one-shot mode, the internal C/T clock is
more useful than an external clock; refer to
page 98 for more information about the C/T clock
sources.
Using software, specify the counter/timer mode as repetitive one-shot, the polarity of the
output pulses (high-to-low transition or low-to-high transition), the C/T clock source as
internal (recommended), the clock divider, and the active gate type (rising edge or falling
edge). Refer to
page 99 for more information about pulse output types and to page 98 for more
information about gates.
Note: In the case of a repetitive one-shot operation, a duty cycle of 100% is set automatically.
Make sure that the signals are wired appropriately. Refer to page 61 for an example of
connecting a repetitive one-shot application.