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PIC16F722-E/ML Datasheet(PDF) 135 Page - Microchip Technology |
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PIC16F722-E/ML Datasheet(HTML) 135 Page - Microchip Technology |
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135 / 302 page  © 2009 Microchip Technology Inc. DS41341E-page 135 PIC16F72X/PIC16LF72X 15.0 CAPTURE/COMPARE/PWM (CCP) MODULE The Capture/Compare/PWM module is a peripheral which allows the user to time and control different events. In Capture mode, the peripheral allows the timing of the duration of an event. The Compare mode allows the user to trigger an external event when a predetermined amount of time has expired. The PWM mode can generate a Pulse-Width Modulated signal of varying frequency and duty cycle. The timer resources used by the module are shown in Table 15-1. Additional information on CCP modules is available in the Application Note AN594, “Using the CCP Modules” (DS00594). TABLE 15-1: CCP MODE – TIMER RESOURCES REQUIRED TABLE 15-2: INTERACTION OF TWO CCP MODULES CCP Mode Timer Resource Capture Timer1 Compare Timer1 PWM Timer2 CCP1 Mode CCP2 Mode Interaction Capture Capture Same TMR1 time base Capture Compare Same TMR1 time base(1, 2) Compare Compare Same TMR1 time base(1, 2) PWM PWM The PWMs will have the same frequency and update rate (TMR2 interrupt). The rising edges will be aligned. PWM Capture None PWM Compare None Note 1: If CCP2 is configured as a Special Event Trigger, CCP1 will clear Timer1, affecting the value captured on the CCP2 pin. 2: If CCP1 is in Capture mode and CCP2 is configured as a Special Event Trigger, CCP2 will clear Timer1, affecting the value captured on the CCP1 pin. Note: CCPRx and CCPx throughout this document refer to CCPR1 or CCPR2 and CCP1 or CCP2, respectively. |
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