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SH79F1615P/032PR Datasheet(PDF) 82 Page - SINOWEALTH Electronic Ltd |
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SH79F1615P/032PR Datasheet(HTML) 82 Page - SINOWEALTH Electronic Ltd |
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82 / 144 page ![]() SH79F1615 82 8.1.9 注意事项 边沿对齐计数模式中占空比寄存器值为0或周期值 边沿对齐计数模式中,若占空比寄存器为0或周期值,则根据不同的极性设置,PWMx/PWMx1应输出占空比为0%或100% 的波形。令PWMOE = 0xBF、PWMDT0L/H = 0、PWMDT1L/H = 0在边沿对齐时基计数、互补输出模式下,不同占空比值的PWM 引脚输出的波形、中断标志触发位置、事件触发位置、寄存器重载位置如图8-1-16 - 图8-1-18所示。 注意:PWM时基Enable时刻,虽然时基计数器为0,但不会产生归零(zero match)信号,因此不会置PWMZIF标志,也 不会产生事件触发信号,而寄存器重载信号在PWMEN = 0时是立即发生的。 0 1 2 3 4 PWMP = 5 PWM Counter PWM Clock PWMx(PWMxS=0) Duty Zone None-Duty Zone PWMxD PWMZIF = 1 Reload PWMP& PWMx/x1D &DT[1:0]&PWMDT0/ 1&PTCLK1/0 Triger Timer&ADC 0 1 2 3 4 0 1 2 3 4 PWMxD PWMxD PWMx1(PWMx1S=0) PWMx(PWMxS=1) PWMxD PWMxD PWMxD PWMx1(PWMx1S=1) PWMxD = 3 PWMxD = 3 PWMxD represents PWMxDH:PWMxDL PWMP represents PWMPH:PWMPL x = 0~2 PWMEN High Impedance High Impedance High Impedance High Impedance PWMZIF = 1 Reload PWMP& PWMx/x1D &DT[1:0]&PWMDT0/ 1&PTCLK1/0 Triger Timer&ADC PWMZIF = 1 Reload PWMP& PWMx/x1D &DT[1:0]&PWMDT0/ 1&PTCLK1/0 Triger Timer&ADC PTUDxIF = 1 PTDDxIF = 0 PWMOE = 0x3F PTUDxIF = 1 PTDDxIF = 0 PTUDxIF = 1 PTDDxIF = 0 图8-1-16 边沿对齐计数、互补输出模式 |
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