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PIC16F913 Datasheet(PDF) 184 Page - Microchip Technology |
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PIC16F913 Datasheet(HTML) 184 Page - Microchip Technology |
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184 / 272 page  PIC16F917/916/914/913 DS41250E-page 182 Preliminary © 2005 Microchip Technology Inc. 15.3.3 SETUP FOR PWM OPERATION The following steps should be taken when configuring the CCP module for PWM operation: 1. Set the PWM period by writing to the PR2 register. 2. Set the PWM duty cycle by writing to the CCPR1L register and CCP1CON<5:4> bits. 3. Make the RC5/T1CKI/CCP1/SEG10 pin an output by clearing the TRISC<5> bit. 4. Set the TMR2 prescale value and enable Timer2 by writing to T2CON. 5. Configure the CCP1 module for PWM operation. TABLE 15-1: EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 20 MHz TABLE 15-2: REGISTERS ASSOCIATED WITH CAPTURE, COMPARE AND TIMER1 PWM Frequency 1.22 kHz 4.88 kHz 19.53 kHz 78.12kHz 156.3 kHz 208.3 kHz Timer Prescaler (1, 4, 16) 16 4 1 1 1 1 PR2 Value 0xFFh 0xFFh 0xFFh 0x3Fh 0x1Fh 0x17h Maximum Resolution (bits) 10 10 10 8 7 5.5 Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on: POR, BOR Value on all other Resets 0Bh,8Bh, 10Bh, 18Bh INTCON GIE PEIE T0IE INTE RBIE T0IF INTF RBIF 0000 000x 0000 000x 0Ch PIR1 EEIF ADIF RCIF TXIF SSPIF CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000 0Dh PIR2 OSFIF C2IF C1IF LCDIF — LVDIF — CCP2IF 0000 -0-0 0000 -0-0 8Ch PIE1 EEIE ADIE RCIE TXIE SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000 8Dh PIE2 OSFIE C2IE C1IE LCDIE — LVDIE — CCP2IE 0000 -0-0 0000 -0-0 87h TRISC TRISC7 TRISC6 TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0 1111 1111 1111 1111 0Eh TMR1L Holding Register for the Least Significant Byte of the 16-bit TMR1 Register xxxx xxxx uuuu uuuu 0Fh TMR1H Holding Register for the Most Significant Byte of the 16-bit TMR1 Register xxxx xxxx uuuu uuuu 10h T1CON T1GINV T1GE T1CKPS1 T1CKPS0 T1OSCEN T1SYNC TMR1CS TMR1ON 0000 0000 uuuu uuuu 15h CCPR1L Capture/Compare/PWM Register1 (LSB) xxxx xxxx uuuu uuuu 16h CCPR1H Capture/Compare/PWM Register1 (MSB) xxxx xxxx uuuu uuuu 17h CCP1CON — — CCP1X CCP1Y CCP1M3 CCP1M2 CCP1M1 CCP1M0 --00 0000 --00 0000 1Bh CCPR2L Capture/Compare/PWM Register 2 (LSB) xxxx xxxx uuuu uuuu 1Ch CCPR2H Capture/Compare/PWM Register 2 (MSB) xxxx xxxx uuuu uuuu 1Dh CCP2CON — — CCP2X CCP2Y CCP2M3 CCP2M2 CCP2M1 CCP2M0 --00 0000 --00 0000 Legend: x = unknown, u = unchanged, - = unimplemented, read as ‘0’. Shaded cells are not used by Capture and Timer1. |
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