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SDK移植到5*5的芯片上,上电就死机了,怎么回事呢?



用simple_peripheral工程,将CC2640R2_LAUNCHXL(7*7)的工程程序(在第三方开发板验证工程是正常的)移植到5*5的板子上(自己画的),修改宏定义将CC2640R2_LAUNCHXL修改为CC2640R2DK_5XD,射频前端用的是差分,外部bias;屏蔽掉POWER_SAVING,24M晶振和32.768khz的晶振都能起振,但打开POWER_SAVING后,上电用示波器查看两个晶振振一下就停掉了,程序就死了一样,怎么回事呢?