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TMS320F28377D: 芯片上电后,以及在程序烧进Flash但在Run之前,pwm输出引脚的电平状态如何确定?

Part Number: TMS320F28377D

对各路PWM的配置均完全相同,但其中一路的初始电平(在运行程序之前)的电平是高,其他的都是低,不明白这个状态是由哪里设置的?已经把各路PWM都设置了上拉使能。