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Figure 11-3. Example of PWM Output by Main Pulse and Additional Pulse
0
PWMn = xx40H
Main pulse
BRM additional pulse
(Modulo L = 40H)
PWM output
PWMn = xxC0H
Main pulse
BRM additional pulse
(Modulo L = C0H)
PWM output
Remark
f
: PWM clock frequency
PWMC
T
: value of modulo H register
X
x
: number of bits of modulo H register (selected with PMP bit)
Active level : high level
0
PWMn = 0000H
Main pulse
L
BRM additional pulse
(Modulo L = 00H)
L
PWM output
PWMn = 0001H
Main pulse
L
BRM additional pulse
(Modulo L = 01H)
L
PWM output
PWMn = FFFFH
Main pulse
BRM additional pulse
(Modulo L = FFH)
PWM output
Remark Condition: number of bits of modulo H register = 8 bits, 16-bit accuracy, active level = high level
CHAPTER 11 PWM UNIT
16-bit resolution is gained when the 256 outputs are averaged
1
2
3
4
5
1/f
x T
PWMC
x
1/f
PWMC
x
1/f
x 2
PWMC
Figure 11-4. Example of PWM Output Operation
16-bit resolution is gained when the 256 outputs are averaged
1
2
3
4
5
User's Manual U11969EJ3V0UM00
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10
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7
8
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13
254
255
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254
255
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