Abov MC97F60128 - Page 187

187
MC97F60128
ABOV Semiconductor Co., Ltd.
Figure 11.32 Example of PWM waveform in Back-to-Back mode at 4 MHz
Figure 11.33 Example of Phase Correction and Frequency correction of PWM
T8CNT
Duty1
Back-to-Back
mode
Output
00
H
00
H
00
H
MAX
MAX
MAX
Period1
Duty, Period Update
Duty2
Period2
Duty3
Period3
Overflow INT.
Overflow INT.
Bottom INT.
Overflow INT.
Interrupt Timing
T8CNT
00
01
02
03
04
P61/PWM8AA
POLAA = 1
T8CR = 03
H
(2us)
T8PPRH = 00
H
T8PPRL = 0B
H
T8ADRH = 00
H
T8ADRL = 05
H
09
08
07
06
05
0A
0B
0B
0A
06
07
08
09
02
03
04
05
01
00
00
01
05
04
03
02
07
06
Source Clock
(f
X
)
08
Duty Cycle
(1+05
H
)X2us = 12us
Duty Cycle
(1+05
H
)X2us = 12us
Duty Cycle
(1+05
H
)X2us = 12us
Period Cycle
(1+0B
H
)X2us = 26us  38.46kHz
Start down Counter
Period Cycle
(1+0B
H
)X2us = 26us  38.46kHz
Duty match
detect
Start up Counter
Duty match
detect