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msp430f149



利用P12口pwm输出:TIMERA设为增计数模式,时钟为8M,设TACCR0=799,TACCR1=400,输出模式为7(复位置位模式)则输出为10KHz方波((799+1)/8M),但实测时;输出方波峰峰值为30mV,抖动为20mV,有没有办法使输出幅度变大,纹波减下?