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CC2640 使用4XS封装无法搜索到蓝牙

Other Parts Discussed in Thread: CC2640

CC2640 ,协议栈是ble_sdk_2_02_02_25,hid_emu_kbd工程。按照第三种参考电路画的PCB,采用外部1.8v LDO 供电,VDDS 和VDDR都采用1.8V直接供电。 ccfg.c中已关闭DCDC, 程序运行正常,可控制闪灯和按键。也可进入广播状态, 但蓝牙无法被搜索到。请问是什么原因。