USART3 bootloader pins not avaible in some packages, are they remapped?

MBC · ‎2023-10-05

STM32H5x3 / VQFN68 package

Has USART3 but AN2606 lists using PD8/PD9 that this package does not have.

AN2606 has a lot of remapping mentions for specific packages. Is this one of them, or does USART3 and bootloader not work for this package?

Tesla DeLorean · ‎2023-10-05

Understand that there is frequently one die and one software package, how this bonds out depends on the number of pins on a given device. Some options will be physically excluded where those pins don't escape.

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Tesla DeLorean · ‎2023-10-05

Understand that there is frequently one die and one software package, how this bonds out depends on the number of pins on a given device. Some options will be physically excluded where those pins don't escape.

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Up vote any posts that you find helpful, it shows what's working..

KDJEM.1 · ‎2023-10-06

Hello @MBC ,

A similar question is already asked here.

For STM32H573 and STM32H563, you can activate the USART3 bootloader with only by PD8/PD9 pins.

Thank you.

Kaouthar

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