Abov MC97F60128 - Page 185

185
MC97F60128
ABOV Semiconductor Co., Ltd.
Figure 11.29 Example of PWM at 4 MHz
Figure 11.30 Example of Changing the Period in Absolute Duty Cycle at 4 MHz
T4CNT
00
01
02
03
04
P61/PWM8AA
POLAA = 1
T8CR = 03
H
(2us)
T8PPRH = 00
H
T8PPRL = 0E
H
T8ADRH = 00
H
T8ADRL = 05
H
09
08
07
06
05
0D
0C
0B
0A
02
01
00
0E
06
05
04
03
0A
09
08
07
03
02
01
00
05
04
Source Clock
(f
x
)
06
Duty Cycle
(1+05
H
)X2us = 12us
Duty Cycle
(1+05
H
)X2us = 12us
Duty Cycle
(1+05
H
)X2us = 12us
Period Cycle
(1+0E
H
)X2us = 32us  31.25kHz
Period Cycle
(1+0A
H
)X2us = 22us  45.5kHz
Write 0A
H
to T4PPRL
Source Clock
(f
x
)
Duty Cycle(1+80
H
)X250ns = 32.25us
T8CNT
00
01
02
03
04
7F
80
81
82
3FF
00
01
02
P61/PWM8AA
POLAA = 1
P61/PWM8AA
POLAA = 0
Period Cycle(1+3FF
H
)X250ns = 256us  3.9kHz
T8PPRL(8 Bit)
T8ADRL(8 Bit)
T8PPRH(2 Bit)
T8ADRH(2 Bit)
03
H
FF
H
00
H
80
H
T8CR = 00
H
(f
XIN
)
T8PPRH = 03
H
T8PPRL = FF
H
T8ADRH = 00
H
T8ADRL = 80
H