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AKhat
AKhat
Associate
April 22, 2019
Question

Is there a Hardware difference in the GPIO registers or typo in the datasheet.

  • April 22, 2019
  • 2 replies
  • 690 views

In the datasheet for STM32F4 https://www.st.com/resource/en/datasheet/stm32f413cg.pdf, the first page says “Up to 109 fast I/Os up to 100Mhz�? and Block diagram on page 18 shows AHB 1 bus 100MHz connecting to GPIO ports. Whereas in STMf2 https://www.st.com/resource/en/datasheet/cd00237391.pdf the first page says “Up to 136 fast I/Os up to 60MHz�? nd Block diagram on page 18 shows AHB 1 bus 120MHz connecting to GPIO ports.

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    2 replies

    S.Ma
    S.Ma
    Principal
    April 22, 2019

    Well actually the GPIO probably won't output >80MHz CMOS signals. It's more likely their speed capability to toggle than the GPIO registers clock frequency.

    AKhat
    AKhatAuthor
    Associate
    April 22, 2019

     https://www.st.com/resource/en/datasheet/stm32f413cg.pdf, the first page says “Up to 109 fast I/Os up to 100Mhz�?. Is this wrong

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