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关于F28335的复位信号的问题



大家好,我做了几块DSP F28335电路板,使用稳压芯片上的复位信号和3.3V电压供电,出厂Flash中没有程序时,电源芯片输出的复位信号是一种尖脉冲,高电平4ms,低电平是个脉冲。但是flash有程序的复位信号就是一个高电平。那个尖脉冲没错,因为几块新dsp都这样,往flash烧过程序后,就变成高电平了,为啥呀