Ppg Operation - Fujitsu FR60 Hardware Manual

7.4

PPG Operation

The PPG operation allows continuous pulses to be output after a start trigger is
detected. The cycle and duty ratio of the output pulses can be controlled by changing
the values of the PCSR and PDUT, respectively.
After data is written to PCSR, be sure to write to PDUT.
■ PPG Operation
❍ When restart is inhibited
Figure 7.4-1 shows a timing chart of the PPG operation when trigger restart is inhibited.
Figure 7.4-1 Timing Chart of PPG Operation (Trigger Restart Prohibited)
Start
trigger
m
n
o
PPG
Rising edge detected
A
B
A=T (n+1) ms
B=T (m+1) ms
CHAPTER 7 PPG TIMER
Trigger ignored
T: Counter clock cycle
m: PCSR value
n: PDUT value
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