SYSCFG
             SELECTOR0
               +\
       GPIOA0--+ \        EXTI
               |  +    +--------+
       GPIOB0--+  |    |        |
               |  +----+GPIOn0  |
        ...  --+  |    |        |
               |  +    +--------+
       GPIOK0--+ /     |        |
               +/      |GPIOn1  |
                       |        |
              SYSCFG   +--------+
            SELECTOR15 |        |
               +\      | ...    |
      GPIOA15--+ \     |        |
               |  +    +--------+
      GPIOB15--+  |    |        |
               |  +----+GPIOn15 |
        ...  --+  |    |        |
               |  +    +--------+
      GPIOK15--+ /     |        |
               +/  +---+RTC Wkp |
                   |   |        |
RTC Wkup pin+------+   +--------+
                       |        |
ETH Wkup pin+----------+ETH Wkp |
                       |        |
                       +--------+
                       |        |
                       | ...    |
                       |        |
                       +--------+