PWM Design Parameters
PIC PWM Governing Equations
Tins(μs) = 4 / Fosc(MHz)
T(μs) = Tins × Prescaler × (PR2 + 1)
Ton(μs) = Tins × Prescaler × (CCPR1L:CCP1CON<5:4> / 4)
10-bit DC Val = CCPR1L:CCP1CON<5:4> = Duty% × 4 × (PR2 + 1)
Target Specifications Out of Bounds!
The requested PWM timing cannot be generated with Timer2 for this FOSC.
Interactive PWM Waveform Diagram (2 Cycles)
High State (Ton)
Low State (Toff)
Hover over the waveform diagram to inspect instantaneous timing parameters & amplitude.
Optimal Configuration
Hardware Register Calculations
Timer2 Prescaler
1:16
PR2 Register
249
0xF9
CCPR1L (8-bit MSB)
125
0x7D
10-Bit Duty Reg
500
0x01F4
Actual Freq:
1.00 kHz
Actual Duty %:
50.00 %
Freq Error:
0.00 %
Generated XC8 / CCS C Firmware Code
// Perform calculation to generate C code
Prescaler Comparison Table (1:1, 1:4, 1:16)
3 prescalers| Prescaler | PR2 (Dec / Hex) | CCPR1L | 10-bit Duty | Actual Freq | Status | Action |
|---|---|---|---|---|---|---|
| No calculation performed yet. | ||||||