Fujitsu FR81S User Manual
CHAPTER 17: PPG
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER
: PPG
FUJITSU SEMICONDUCTOR CONFIDENTIAL
40
5.1. PWM Operation (Normal Wave Form)
The PWM operation (Normal Wave Form) is explained.
During the PWM operation, variable-duty pulses are output at the PPG pin.
Figure 5-1 Example of PWM Operation (Normal Wave Form Selected)
CNTE
Activation trigger
PCSR
8000
8000
PDUT
0007
0005
Buffer
(cycle value)
8000
8000
Down count
value (PTMR)
0007
0005
(1)
(2) Writing
(3)
Enable PPG operation
(4)
(5) Load
(5) Load
(6) Rewriting
(7) Down count
0007
0005
(8) Match
(9) Inversion
(12) Clear
(11) Borrow
(13) Load
(13) Load
Inversion
Clear
Inversion
Reload
Reload
Match
Borrow
(10) Down count
Match
Duty
Cycle
Normal polarity
Inverted polarity
PPG pin output
Interrupt factor
Valid edge
Duty match
Counter borrow
Duty match
Counter borrow
Buffer
(duty value)
MB91520 Series
MN705-00010-1v0-E
581