PIC18F23K20-E/MLQTP MICROCHIP [Microchip Technology], PIC18F23K20-E/MLQTP Datasheet - Page 163

• Manufacturer Part Number: PIC18F23K20-E/MLQTP
• Description: 28/40/44-Pin Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

15.4.3
The resolution determines the number of available duty
cycles for a given period. For example, a 10-bit resolution
will result in 1024 discrete duty cycles, whereas an 8-bit
resolution will result in 256 discrete duty cycles.
The maximum PWM resolution is 10 bits when PR2 is
255. The resolution is a function of the PR2 register
value as shown by Equation 15-4.
TABLE 15-4:
TABLE 15-5:
TABLE 15-6:
© 2007 Microchip Technology Inc.
Timer Prescaler (1, 4, 16)
PR2 Value
Maximum Resolution (bits)
Timer Prescale (1, 4, 16)
PR2 Value
Maximum Resolution (bits)
Timer Prescale (1, 4, 16)
PR2 Value
Maximum Resolution (bits)
PWM Frequency
PWM Frequency
PWM Frequency
PWM RESOLUTION
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 40 MHz
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS (F
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS (F
1.22 kHz
1.22 kHz
2.44 kHz
0xFF
0x65
16
10
16
FFh
8
16
10
Advance Information
4.88 kHz
4.90 kHz
9.77 kHz
0xFF
0x65
FFh
10
10
4
4
8
4
39.06 kHz
19.53 kHz
19.61 kHz
EQUATION 15-4:
PIC18F2XK20/4XK20
Note:
0xFF
0x65
FFh
10
10
1
1
1
8
Resolution
If the pulse width value is greater than the
period the assigned PWM pin(s) will
remain unchanged.
156.25 kHz
78.12 kHz
76.92 kHz
3Fh
0x3F
0x19
1
8
1
8
1
6
OSC
OSC
=
PWM RESOLUTION
log
----------------------------------------- - bits
= 20 MHz)
= 8 MHz)
[
312.50 kHz
4 PR2
153.85 kHz
log
156.3 kHz
(
1Fh
0x0C
0x1F
2 ( )
1
7
1
7
1
5
+
DS41303B-page 161
1
)
]
416.67 kHz
208.3 kHz
200.0 kHz
6.58
0x17
0x09
17h
6.6
1
1
1
5