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CC2640: 烧录程序问题

Part Number: CC2640

      使用CC2640F128XX芯片,在批量生产时,出现小部分板烧录不进程序的问题,这小部分板更换DCOUPL引脚上的去耦电容为0.1uF后,可正常烧录,且使用无问题,据了解有很多应用电路DCOUPL引脚上的电容都是1uF,请问使用0.1uF的电容有问题么?为什么更换这个电容后可以烧录?麻烦哪位大神解答一下,感谢!