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CHAPTER 16 8-/16-BIT PPG TIMER
●Output waveform in 8-bit PPG output 2-channel independent operation mode
The High and Low pulse widths to be outputted are determined by adding 1 to the value in the PPG reload
register and multiplying it by the count clock cycle. For example, if the value in the PPG reload register is
"00H", the pulse width has one count clock cycle, and if the value is "FFH", the pulse width has 256 count
clock cycles.
The equations for calculating the pulse width are shown below:
PL=T × (L+1)
PH=T × (H+1)
PL: Low width of output pulse
PH: High width of output pulse
L: Values of 8 bits in PPG reload register (PRLLn or PRLLm)
H: Values of 8 bits in PPG reload register (PRLHn or PRLHm)
T: Count clock cycle
Figure 16.5-3 shows the output waveform in the 8-bit PPG output 2-channel independent operation mode.
Figure 16.5-3 Output Waveform in 8-bit PPG Output 2-channel Independent Operation Mode
T × (L + 1) T × (H + 1)
Operating start Operating stop
PPG operating enable
bit (PEN)
PPG output pin
L : Value of PPG reload register (PRLL)
H : Value of PPG reload register (PR LH)
T : Count clock cycle
Note: n = C, E
m = n + 1