VCC_IO1Reserved2SDA/SPI CS_N3GND4GND5SCL/SPI CLK6EXTINT7V_BCKP8VCC9GND10GND11GND12GND13GND14GND15RF_OUT16RF_IN17GND18GND19D_SEL20GND21GND22RESET_N23SAFEBOOT_N24TXD/SPI MISO25RXD/SPI MOSI26GND27Reserved28TIMEPULSE29LNA_EN30GND31