Fujitsu MB90420/5 (A) Series Hardware Manual page 332

MB90420/5 (A) SERIES F
[bits 3, 2] IRS1, IRS0: Interrupt factor select bits
These bits select the factor for setting bit 4 (IRQF).
IRS1
0
0
1
1
[bit 1] POEN: PPG output enable bit
When this bit is set to 1, PPG output is output from the pin.
[bit 0] OSEL: PPG output polarity specification bit
This bit sets the polarity of the PPG output.
The combinations of this bit and bit 9 (PGMS) are shown below:
Polarity
Normal
polarity
Invert
polarity
2
MC-16LX FAMILY 16-BIT MICROCONTROLLERS HARDWARE MANUAL
IRS0
0 Software trigger input or valid trigger input
1 Counter borrow (cycle match)
Normal polarity PPG ↑ or invert polarity PPG ↓ (duty match)
0
Counter borrow or normal polarity PPG ↑ or invert polarity PPG ↓
1
0 General-purpose port
1 PPG output pin
0 Normal polarity
1 Invert polarity
PGMS OSEL
0 0
0 1
1 0
1 1
After Reset
L output
H output
Edge Selection
(initial value)
(initial value)
PPG Output
Normal polarity (initial value)
Invert polarity
Fixed to L output
Fixed to H output
Duty Match
13-8
(initial value)
Counter Match