CHAPTER 11 PWM UNIT
User’s Manual U11969EJ3V0UM00
331
Figure 11-3. Example of PWM Output by Main Pulse and Additional Pulse
Remark
f
PWMC
: PWM clock frequency
T
X
: value of modulo H register
x
: number of bits of modulo H register (selected with PMP bit)
Active level : high level
Figure 11-4. Example of PWM Output Operation
Remark
Condition: number of bits of modulo H register = 8 bits, 16-bit accuracy, active level = high level
0
Main pulse
BRM additional pulse
(Modulo L = 40H)
PWM output
Main pulse
PWMn = xx40H
PWMn = xxC0H
BRM additional pulse
(Modulo L = C0H)
PWM output
1
2
3
4
5
6
7
8
9
10
11
12
13
254
255
1/f
PWMC
x 2
x
1/f
PWMC
x T
x
1/f
PWMC
16-bit resolution is gained when the 256 outputs are averaged
0
Main pulse
L
L
L
L
BRM additional pulse
(Modulo L = 00H)
PWM output
Main pulse
PWMn = 0000H
PWMn = FFFFH
BRM additional pulse
(Modulo L = FFH)
PWM output
1
2
3
4
5
6
7
8
9
10
11
12
13
254
255
16-bit resolution is gained when the 256 outputs are averaged
Main pulse
BRM additional pulse
(Modulo L = 01H)
PWM output
PWMn = 0001H
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