> For the complete documentation index, see [llms.txt](https://tk233.gitbook.io/notes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tk233.gitbook.io/notes/stm32/getting-started-stm32-edition/pinout-quick-reference.md).

# Pinout Quick Reference

STM32H755ZI Nucleo Board

UART: USART3 PD8, PD9

<figure><img src="https://1287130752-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FvVJ0h2a4qMIhB1I8GdV8%2Fuploads%2FypEI0YZjrTKcn74MHMEv%2Fimage.png?alt=media&amp;token=6c990741-55b1-48ea-959e-592156b03ed6" alt=""><figcaption></figcaption></figure>