BOOT021RF12RST22PB2/PIN_A226PB3/PIN_A032PB4/PIN_A131PB530PB6/UART1_TX4PB7/UART1_RX5PB1227GND28GND23GND18GND17GND11PA15/PIN_A43PA14/SWCLK8PA13/SWDIO7PA12/I2C_SCL9PA11/I2C_SDA10PA10/PIN_A325PA920PA819PA7/SPI1_MOSI13PA6/SPI1_MISO14PA5/SPI1_CLK15PA4/SPI1_NSS16PA3/UART2_RX1PA2/UART2_TX2PA16PA029VDD24