PB3/PIN_A032PB4/PIN_A131PB530PA029GND28PB1227PB2/PIN_A226PA10/PIN_A325VDD24GND23RST22BOOT021PA920PA819GND18GND17PA4/SPI1_NSS16PA5/SPI1_CLK15PA6/SPI1_MISO14PA7/SPI1_MOSI13RF12GND11PA11/I2C_SDA10PA12/I2C_SCL9PA14/SWCLK8PA13/SWDIO7PA16PB7/UART1_RX5PB6/UART1_TX4PA15/PIN_A43PA2/UART2_TX2PA3/UART2_RX1