1Allocation of GPIOs and EXTI interrupts
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3PA0   WAKEUP     EXTI0_IRQn
4PA1   WIRQ1
5PA2   SW_USR     EXTI2_IRQn (connected to INT_HUM too, but Humidity driver does not use it)
6PA3   WIRQ2
7PA4   SPI1_NSS   (slave)
8PA5   SPI1_SCK   (slave)
9PA6   SPI1_MISO  (slave)
10PA7   SPI1_MOSI  (slave)
11PA8   I2C3_SCL
12PA9   UART1_TX
13PA10  UART1_RX
14PA11  EXT_GPIO0  EXTI15_10_IRQn
15PA12  EXT_GPIO1  EXTI15_10_IRQn
16PA13  SWDIO
17PA14  SWCLK
18PA15  INT_BARO   EXTI15_10_IRQn
19
20PB0   I2S5_CK
21PB1   INT_ACCG   EXTI1_IRQn
22PB2   LED1       (at reset it is used in input as BOOT1)
23PB3   INT_ALS    EXTI3_IRQn
24PB4   I2C3_SDA
25PB5   INT_HALL   EXTI9_5_IRQn
26PB6   I2C1_SCL   (slave)
27PB7   I2C1_SDA   (slave)
28PB8   I2S5_SD
29PB9   I2C2_SDA
30PB10  I2C2_SCL
31PB12  SPI2_NSS
32PB13  SPI2_SCK
33PB14  SPI2_MISO
34PB15  SPI2_MOSI
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36PC13  LED0
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