ST STM32F446 Series

General-purpose I/Os (GPIO) RM0390
180/1328 RM0390 Rev 4
Figure 19. Selecting an alternate function on STM32F446xx
1. Configured in FS.
7.3.3 I/O port control registers
Each of the GPIOs has four 32-bit memory-mapped control registers (GPIOx_MODER,
GPIOx_OTYPER, GPIOx_OSPEEDR, GPIOx_PUPDR) to configure up to 16 I/Os. The
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