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CC3235S: 程序下载到外接flash后,无法运行

Part Number: CC3235S

按照TI官方推荐的原理图设计PCB。PCB焊接完成后,将CC3235作为AP的程序下载到flash中,并没有观察到CC3235发射的WiFi信号。而将同样的程序下载到LAUNCHXL-CC3235S中,可以观察到发射的WiFi信号。推测程序没有正常运行。测试FLASH_SPI_DIN(13脚)的信号,观察信号高低电平的总时间判断程序是否从flash中加载成功。与LAUNCHXL-CC3235S相比,设计的板卡只加载了一部分程序。此时设计板卡的射频DCDC转换器输出电压不正常,会从2.3V逐渐下降到0V,并且DCDC_PA_SW_P脚无开关信号。请问CC3235内部射频DCDC转换器工作不正常会影响到CC3235从flash中加载程序吗?