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CC3200 WIFI不能搜索到,请协助!

Other Parts Discussed in Thread: CC3200, CC3100

问题如下,CC3200正常烧录软件后,手机APP上不能搜索到CC3200_WiFi,经检测发现PIN40,41,42,33,DCDC_PA_SW_P,DCDC_PA_SW_N,VDD_PA这部分电路无输出电压,换了几个主板都一样现象,确认焊接没有问题;另外外供1.8V电压到这部分电路PIN42 VDD_PA后,可以正常连接WIFI,请TI工程师帮忙分下原因,谢谢!