Fujitsu FR81S User Manual
CHAPTER 17: PPG
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : PPG
FUJITSU SEMICONDUCTOR CONFIDENTIAL
FUJITSU SEMICONDUCTOR CONFIDENTIAL
52
5.8. Timing Point Capture Mode Operation (PWM Normal
Wave Form Selected)
The Timing Point Capture mode operation (PWM Normal Wave Form selected) is explained.
In the Timing Point Capture mode operation, the interrupt and the AD activation trigger are generated
according to the timing of the Timing Point Capture setting value. If the PPG output waveform selection bit
(PCN.OWFS)="1" (Center Aligned Wave Form) is selected, the doubling setting value of the Timing Point
Capture value setting register and the down counter value are compared. Moreover, the PWM operation, the
one shot operation, Normal Wave Form, and Center Aligned Wave Form are supported.
according to the timing of the Timing Point Capture setting value. If the PPG output waveform selection bit
(PCN.OWFS)="1" (Center Aligned Wave Form) is selected, the doubling setting value of the Timing Point
Capture value setting register and the down counter value are compared. Moreover, the PWM operation, the
one shot operation, Normal Wave Form, and Center Aligned Wave Form are supported.
Figure 5-9 Timing Point Capture Operation (PWM Normal Wave Form Selected)
CNTE
Activation trigger
PTPC
7FFA
PCSR
8000
PDUT
0007
Buffer
(cycle value)
(cycle value)
8000
0007
Buffer
(duty value)
(duty value)
Down count value
(PTMR)
(PTMR)
8000
0005
0007
PPG pin output
Normal polarity
Inverted polarity
Interrupt factor
duty
cycle
Valid
edge
edge
Duty match
Counter
borrow
Duty match
TPC
(1)
(2)
(6)
(11) match
(17)
Timing Point Capture
match
Timing Point Capture
match
ADTRG
(12) AD start trigger generation
(4) Timing Point Capture enable
(5) Enable PPG operation
(3) Writing
(7) Load
(8) down count
(9) match
(10) inversion
(13) down count
(14) borrow
(15) clear
(16) Reload
Timing Point Capture
setting value
setting value
MB91520 Series
MN705-00010-1v0-E
593