求问:5509A自举问题,flash为AT25F1024N,一开始复位电路直接接了上拉电阻到3.3V,程序下到flash里面自举不成功,后来复位电路加了按键,结果偶尔可以自举成功。每次复位后,如果自举不成功,则MCBSP0的SCK引脚会输出时钟,但是FLASH的SO引脚并不会出数据,这是为什么?
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