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CC2640: CC2640烧录好程序,重新上电部分出现死机情况

Part Number: CC2640
Other Parts Discussed in Thread: UNIFLASH, SIMPLELINK-2-4GHZ-DESIGN-REVIEWS

    生产阶段发现,部分器件在烧录好程序,重新上电后死机,晶振不起振;通过硬件在Pin35 RESET引脚上 手动加低电平 外部复位,器件仍无反应,但是在该引脚上加一个VCC3.3V电压,可唤醒器件,工作均正常;但是一旦断电后,又恢复死机状态,再在RESET上加一个高电平3.3V时,又可唤醒;

    通过筛查我们发现生产阶段中OK的板子,在器件RESET引脚上加低电平是可以正常复位,加高电平则无变化;

    我们测量的VDDS,DCOUPL和VDDR引脚的电压均正常

   请问这是为什么?