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M38049FFHKP датащи(PDF) 244 Page - Renesas Technology Corp |
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M38049FFHKP датащи(HTML) 244 Page - Renesas Technology Corp |
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244 / 387 page ![]() 2-120 APPLICATION 2.6 PWM Rev.1.00 Jan 14, 2005 REJ09B0212-0100Z 3804 Group (Spec.H) 2.6.3 PWM output circuit application example <Motor control> Outline : The rotation speed of the motor is controlled by using PWM (pulse width modulation) output. Figure 2.6.5 shows a connection diagram ; Figures 2.6.6 shows PWM output timing, and Figure 2.6.7 shows a setting of the related registers. Fig. 2.6.5 Connection diagram Specifications : • Motor is controlled by using the PWM output function of 8-bit resolution. • Clock f(XIN) = 5 MHz • “T”, PWM cycle : 102 µs • “t”, “H” level width of output pulse : 40 µs (Fixed speed) ✽ A motor speed can be changed by modifying the “H” level width of output pulse. Fig. 2.6.6 PWM output timing P56/PWM 3804 group (Spec. H) D/A converter Motor driver M PWM output t = 40 µs T = 102 µs |
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