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PIC18F6X2X bảng dữ liệu(PDF) 171 Page - Microchip Technology |
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PIC18F6X2X bảng dữ liệu(HTML) 171 Page - Microchip Technology |
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171 / 386 page ![]() 2003 Microchip Technology Inc. Advance Information DS39612A-page 169 PIC18F6X2X/8X2X FIGURE 17-8: PWM DIRECTION CHANGE FIGURE 17-9: PWM DIRECTION CHANGE AT NEAR 100% DUTY CYCLE DC Period(1) SIGNAL Note 1: The direction bit in the CCP1 Control register (CCP1CON<7>) is written any time during the PWM cycle. 2: When changing directions, the P1A and P1C signals switch before the end of the current PWM cycle at intervals of 4 TOSC, 16 TOSC or 64 TOSC, depending on the Timer2 prescaler value. The modulated P1B and P1D signals are inactive at this time. Period (Note 2) P1A (Active High) P1B (Active High) P1C (Active High) P1D (Active High) DC Forward Period Reverse Period P1A tON tOFF t = tOFF – tON P1B P1C P1D External Switch D Potential Shoot-Through Current Note 1: All signals are shown as active high. 2: tON is the turn on delay of power switch QC and its driver. 3: tOFF is the turn off delay of power switch QD and its driver. External Switch C t1 DC DC |
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