PULSE-WIDTH MODULATOR

where:

 

 

 

 

 

PWM_PERIOD

=

8-bit value to load into the PWM_PERIOD register

 

FXTAL1

=

input frequency on XTAL1 pin, in MHz

 

TPWM

=

output period on the PWM output pins, in μs

 

FPWM

=

output frequency on the PWM output pins, in MHz

 

 

 

 

Table 10-3. PWM Output Frequencies (FPWM)

 

PWM_PERIOD

 

 

XTAL1 Frequency (FXTAL1)

 

 

 

 

 

 

8 MHz

10 MHz

16 MHz

 

 

 

 

 

 

 

 

 

00H

 

 

15.6 kHz

19.5 kHz

31.2 kHz

 

 

 

 

 

 

0FH

 

 

976.6 Hz

1220.7 Hz

1953.1 Hz

 

 

 

 

 

 

1FH

 

 

488.3 Hz

610.3 Hz

976.6 Hz

 

 

 

 

 

 

2FH

 

 

325.5 Hz

406.9 Hz

651.0 Hz

 

 

 

 

 

 

3FH

 

 

244.1 Hz

395.2 Hz

488.3 Hz

 

 

 

 

 

 

4FH

 

 

195.3 Hz

244.1 Hz

390.6 Hz

 

 

 

 

 

 

5FH

 

 

162.8 Hz

203.4 Hz

325.5 Hz

 

 

 

 

 

 

6FH

 

 

139.5 Hz

174.4 Hz

279.0 Hz

 

 

 

 

 

 

7FH

 

 

122.1 Hz

152.6 Hz

244.1 Hz

 

 

 

 

 

 

8FH

 

 

108.5 Hz

135.6 Hz

217.0 Hz

 

 

 

 

 

 

9FH

 

 

97.7 Hz

122.1 Hz

195.3 Hz

 

 

 

 

 

 

AFH

 

 

88.8 Hz

111.0 Hz

177.6 Hz

 

 

 

 

 

 

BFH

 

 

81.4 Hz

101.7 Hz

162.8 Hz

 

 

 

 

 

 

CFH

 

 

75.1 Hz

93.9 Hz

150.2 Hz

 

 

 

 

 

 

DFH

 

 

69.7 Hz

87.2 Hz

139.5 Hz

 

 

 

 

 

 

EFH

 

 

65.1 Hz

81.4 Hz

130.2 Hz

 

 

 

 

 

 

FFH

 

 

61.0 Hz

76.0 Hz

122.0 Hz

 

 

 

 

 

 

10-5

Page 232
Image 232
Intel 8XC196MH, 8XC196MD, 8XC196MC manual PWM Output Frequencies Fpwm, Pwmperiod