One-Shot Operation; Fig. 13.4 Timing Of Disabling One-Shot Operation Restart; Fig. 13.5 Timing Of Enabling One-Shot Operation Restart - Fujitsu MB90420/5 (A) Series Hardware Manual

Note: After writing data to PCSR, always write to PDUT.
Note: When the external TRG input is selected as the start trigger, input a pulse with the minimum or lager
pulse width shown below.
Minimum pulse width: 2 machine cycles
However, a pulse with a smaller width may still be recognized as a valid pulse. Also, since this
product has no filter for the external TRG input, add a filter, if necessary.

13.4.2 One-shot Operation

At one-shot operation, a single pulse of any width can be output by a trigger. With restart enabled, the
counter is reloaded when the start trigger is detected during operation.
n When restart disabled
Start trigger
m
n
o
PPG
n When restart enabled
Start trigger
m
n
o
PPG
Rising edge detected
(2)

Fig. 13.4 Timing of Disabling One-shot Operation Restart

Rising edge detected

Fig. 13.5 Timing of Enabling One-shot Operation Restart

PPG TIMER
Trigger ignored
(1)
Restart by trigger
(1)
(2)
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