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SFR explanation for PIC16F873(13)

CCP2CON ( CCP2 Control Register ) 1Dh This register controls the condition of CCP2 feature. The value in the parenthesis is in the condition immediately after the turning on. CCP2X,CCP2Y : PWM Least Significant bits These bits designate low 2 bits of duty cycle of PWM. As for the operation of the CCP, refer to CCP feature of PIC16F873. CCP2M3,CCP2M2,CCP2M1,CCP2M0 : CCP1 Mode Select bits CCP2 M3 CCP2 M2 CCP2 M1 CCP2 M0 CCP2 mode 0 0 0 0 CCP off 0 1 0 0 Capture mode : every falling edge 0 1 0 1 Capture mode : every rising edge 0 1 1 0 Capture mode : every 4th rising edge 0 1 1 1 Capture mode : every 16th rising edge 1 0 0 0 Compare mode : set output on match 1 0 0 1 Compare mode : clear output on match 1 0 1 0 Compare mode : generate software interrupt on match 1 0 1 1 Compare mode : trigger special event, resets TMR1 and start A/D conversion 1 1 x x PWM mode CCPR2L,CCPR2H ( CCP2 register ) 1Bh, 1Ch This register is used when operating data by the operation of the CCP. The use changes with each mode. As for the operation of the CCP, refer to CCP feature of PIC16F873. Capture mode The contents of timer1 are stored at the time of the capture. It combines and uses both registers as the 16 bits register. Compare mode It sets the data to compare with timer1. It combines and uses both registers as the 16 bits register. PWM mode It sets data for the duty to CCPR2L. CCPR2H is used for the processing inside and is a read-only register.