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where:
PWM_PERIOD
= 8-bit value to load into the PWM_PERIOD register
F
= input frequency on XTAL1 pin, in MHz
1
XTAL
= output period on the PWM output pins, in µs
T
PWM
F
= output frequency on the PWM output pins, in MHz
PWM
PWM_PERIOD
00H
0FH
1FH
2FH
3FH
4FH
5FH
6FH
7FH
8FH
9FH
AFH
BFH
CFH
DFH
EFH
FFH
Table 10-3. PWM Output Frequencies (F
8 MHz
15.6 kHz
976.6 Hz
488.3 Hz
325.5 Hz
244.1 Hz
195.3 Hz
162.8 Hz
139.5 Hz
122.1 Hz
108.5 Hz
97.7 Hz
88.8 Hz
81.4 Hz
75.1 Hz
69.7 Hz
65.1 Hz
61.0 Hz
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PULSE-WIDTH MODULATOR
PWM
XTAL1 Frequency (F
XTAL
10 MHz
19.5 kHz
1220.7 Hz
610.3 Hz
406.9 Hz
395.2 Hz
244.1 Hz
203.4 Hz
174.4 Hz
152.6 Hz
135.6 Hz
122.1 Hz
111.0 Hz
101.7 Hz
93.9 Hz
87.2 Hz
81.4 Hz
76.0 Hz
)
)
1
16 MHz
31.2 kHz
1953.1 Hz
976.6 Hz
651.0 Hz
488.3 Hz
390.6 Hz
325.5 Hz
279.0 Hz
244.1 Hz
217.0 Hz
195.3 Hz
177.6 Hz
162.8 Hz
150.2 Hz
139.5 Hz
130.2 Hz
122.0 Hz
10-5
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