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CHAPTER 10 8/16-bit PPG timer
G
Setting of PPG reload registers when using 16-bit PPG timer
• Use a long-word instruction to set the PPG reload registers (PRLL0/PRLH0, PRLL1/PRLH1) or a word
instruction to set the word instruction to set the PPG0 and PPG1 (PRLL0 → PRLL1 or PRLH0 →
PRLH1) in this order.
[Reload timing in 16-bit PPG output operation mode]
In the 16-bit PPG output operation mode, the reload values written to the PPG0 reload registers (PRLL0/
PRLH0) are written temporarily to the temporary latch, written to the PPG1 reload registers (PRLL1/
PRLH1), and then transferred to the PPG0 reload register (PPLL0, PRLH0). Therefore, when setting the
reload value in the PPG1 reload registers (PRLL1/PRLH1), it is necessary to set the reload value in the
PPG0 reload registers (PRLL0/PRLH0) simultaneously or set the reload value in the PPG0 reload registers
(PRLL0/PRLH0) before setting PPG1 reload value.
Figure 10.6-2 shows the reload timing in the 16-bit PPG output operation mode.
Figure 10.6-2 Reload Timing in 16-bit PPG Output Operation Mode
Writing to PPG0
other than 16-bit PPG
output operating mode
320
Reload value
of PPG0
Only 16-bit PPG output operating mode
Temporary latch
Synchronize with writing
to PPG1 and transmit
PPG reload register
(PRLL0, PRLH0)
Reload value
of PPG1
Write to
PPG1
PPG reload register
(PRLL1, PRLH1)
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