UART1_TXD1UART1_RXD2UART1_RTS3UART1_CTS4UART1_DCD5UART1_DTR6UART1_RI7GND8MICP9MICN10SPKP11SPKN12GND13SIM_DET14SIM_DATA15SIM_CLK16SIM_RST17SIM_VDD18GND19BT_ANT20GND21UART2_TXD22UART2_RXD23USB_VBUS24USB_DP25USB_DN26GND27VRTC28RF_SYNC29GND30GND31GSM_ANT32GND33VBAT34VBAT35GND36GND37ADC38PWRKEY39VDD_EXT40NETLIGHT41STATUS42