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CHAPTER 15 8/16-BIT PPG TIMER
[bit12] PIE1: ppg Interrupt Enable (PPG interrupt enable)
This bit is used to prohibit/allow PPG interrupts.
PIE1
0
1
If PUF0 is set to "1" when this bit is"1", an interrupt request occurs. When this bit is "0", no
interrupt generates.
•
This bit is initialized to "0" at reset.
•
Reading and writing are allowed.
[bit11] PUF1: ppg Underflow Flag (PPG counter underflow)
This bit is used to indicate the result of PPG counter underflow detection.
PUF1
0
1
In 8-bit PPG6 channel mode (PPG0/PPG1,PPG2/PPG3,PPG4/PPG5) and 8-bit prescaler + 8-
bit PPG mode, this bit is set to "1" when an underflow occurs because the counter value of
channel 1, 3, 5 changes "00
PPG3, PPG4/PPG5), this bit is set to "1" when an underflow occurs because the counter value
of channel 1, 3, 5 or channel 0, 2, 4 changes "0000
"0". Writing "1" has no effect. Reading by read-modify-write type instructions will always read
"1".
•
This bit is initialized to "0" at reset.
•
Reading and writing are allowed.
[bit10, bit9] MD1, 0: ppg Count Mode (operation mode selection)
These bits are used to select the PPG timer operation mode.
MD1
0
0
1
1
•
This bit is initialized to "0" at reset.
•
Reading and writing are allowed.
326
Interrupts prohibited
Interrupts allowed
No PPG counter underflow detected
PPG counter underflow detected
" → "FF
H
MD0
0
8-bit PPG2 channel independent mode (✕ 3)
1
8-bit prescaler/8-bit PPG1ch
0
Reserved (setting prohibited)
1
16-bit PPG1 channel mode (✕ 3)
Operation state
Operation state
". In 16-bit PPG3 channel mode (PPG0/PPG1, PPG2/
H
" → "FFFF
H
Operation mode
". Writing "0" clears this bit to
H
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