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CC2640R2F 的gpio口能否连接开关，led，rtc时钟等，做输入输出控制，我看文档好像是可以的，但是我希望能确定一下
可以的，CC2640r2f的GPIO可以自由设定给外设使用，未被使用的IO都可以配置为UART I2C SPI等
