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DSP2812 EVA PWM输出高电平,EVB PWM输出正常

2812中EVA 的PWM1-PWM6输出端不接任何器件,使用比较单元功能输出PWM波形时,PWM1-PWM6输出,T1PWM和T2PWM都是高电平,定时器计数器正常计数,PDPINTA功能禁止了。而EVB的PWM7~12输出正常。EVA与EVB同样软件配置,硬件电路也一样。将PWM1-PWM6设置为数字I/O,可以输出高电平或者低电平。更换了一块同批次DSP也是同样问题。请问有没有可能是EVA单元损坏?