Where: mode is TMR2 Prescale Value, period is PR2 and postscaler is not used in the determination of the PWM frequency (keep it 1). The CCS Timer2 configuration has the following form:
The PWM period can be calculated using the following formula:Īnd the PWM frequency is defined as 1/.įor example for PR2 = 250, microcontroller frequency = 8MHz and Prescale = 16 we get a PWM frequency of 500Hz. The PWM period is specified by writing to the PR2 register. Timer2 is used in the determination of the PWM frequency. The ECCP module can work as a standard CCP module or ECCP module. This topic shows how to use CCP and ECCP modules as PWM modules. PIC18F4550 microcontroller has 1 CCP (Capture/Compare/PWM) module which is CCP2 module and 1 ECCP (Enhanced CCP) module which is CCP1 module.
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