Fujitsu FR81S User Manual
CHAPTER 17: PPG
4. Registers
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER
: PPG
FUJITSU SEMICONDUCTOR CONFIDENTIAL
19
[bit3, bit2] IRS1, IRS0 : Interrupt factor selection bits
IRS1, IRS0
Explanation
0
0
STGR=0: Software trigger or external trigger (TRG pin) input
STGR=1: GATE signal trigger input
0
1
Counter borrow occurrence
1
0
Counter and duty value match
1
1
Counter borrow occurrence or counter and duty value match
Notes:
See the following figures for the relationship between output waveforms and interrupt generation locations:
⋅
In the case of the PPG output waveform selection bit (OWFS="0"):
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Figure 3-1 Example of PWM Operation (Normal Wave Form Selected)
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Figure 3-3 Example of One-shot Operation (Normal Wave Form Selected)
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In the case of the PPG output waveform selection bit (OWFS="1"):
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Figure 3-2 Example of PWM Operation (Center Aligned Wave Form Selected)
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Figure 3-4 Example of One-shot Operation (Center Aligned Wave Form Selected)
[bit1] Reserved
This bit must be set to "0".
[bit0] OSEL : PPG output polarity selection bit
OSEL
Explanation
0
Normal polarity
1
Inverted polarity
This bit selects the PPG output polarity.
If this bit is set to "0", the normal polarity is selected.
If this bit is set to "1", the inverted polarity is selected.
Note:
If the PPG output mask selection bit (PCN:PGMS) is set to "1", setting the PPG output polarity selection bit
(OSEL) to "0" or "1" causes the output to be clamped to "L" or "H", respectively.
* The each bit of the PPG control status register (PCN), except for bit13 MDSE: mode selection bit and bit8
OWFS: PPG output waveform selection bit, will become effective immediately by writing in the register.
MB91520 Series
MN705-00010-1v0-E
560