No of uart channels

Rao · ‎2025-09-11

How many uart channels are available on STM32H573I-DK Discovery kit.

I am Looking for atleast two channels..

Thanks in advance...

STTwo-32 · ‎2025-09-11

Hello @Rao and welcome to the ST Community

You can use the UART3 on the arduino connector pins:

Also, you can use the UART7 available on both ST Mod+ and Pmod connectors. More details are available on the UM3143.

Best Regards.

STTwo-32

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View solution in original post

STTwo-32 · ‎2025-09-11

Hello @Rao and welcome to the ST Community

You can use the UART3 on the arduino connector pins:

Also, you can use the UART7 available on both ST Mod+ and Pmod connectors. More details are available on the UM3143.

Best Regards.

STTwo-32

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

Rao · ‎2025-09-11

Thanks for your immediate response....

erica898 · ‎2026-03-16

The hardware is an STM32H573I-DK, and the development environment is Zephyr.

SDK version is 0.17.4, and Zephyr version is 4.3.99.

Example usage: uart\echo_bot

When modifying the settings to use UART7, UART7 completely stops responding. Replacing it with USART3 restores normal functionality.

When using UART7, is it necessary to enable other pins to switch between the two? It shares pins with SPI5.

It has been determined that pin conversion is required. SB2, SB5, SB6, and SB8 can now correspond to the functions of UART7, whereas they originally corresponded to SPI5.