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DMårt
Lead
Jun 10, 2021 1:41 PM UTC
Solved

BOOT0 pin and SWCLK pin are the same pin - Is that OK?

Hi!

I'm using STM32G030F6P6 TSSOP-20 and I notice that BOOT0 pin and SWCLK pin are the same pin. If I want to program the STM32G030F6P6 MCU, then I only need SWDIO and SWCLK and NRST pin and forget about the BOOT0 pin because BOOT0 pin is not avaiable if I have SWDIO?

0693W00000BadcFQAR.png

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TDK
TDKBest answer
Jun 10, 2021 2:58 PM UTC
It depends on how BOOT0 is wired and the relevant option bytes. I would imagine the nucleo board is set up to run user code automatically, but I'm not going to double check.
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6 replies

TDK
TDK
Jun 10, 2021 2:00 PM UTC

You don't need BOOT0 to program.

You will need to tie BOOT0 low to boot to user code, or set the corresponding option bytes to boot to user code.

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DMårtAuthor
Lead
Jun 10, 2021 2:07 PM UTC

Thank you for your answer. I don't know what "user code" is, but I assume you mean programming with UART?

OK! Then I know that I can ignore the BOOT0 and only use ST-LINKV2 to program the MCU above via SWDIO and SWCLK and NRST.

STM32MP151AAC3 custom board with STM32-OS as operating system: https://github.com/DanielMartensson/STM32-ComputerSTM32MP257FAK3 custom board with STM64-OS as operating system: https://github.com/DanielMartensson/STM64-Computer
TDK
TDK
Jun 10, 2021 2:48 PM UTC

The chip can either boot to system memory (aka bootloader) or the flash (aka user code). BOOT0 (or option bytes which override it) selects which one is selected.

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DMårtAuthor
Lead
Jun 10, 2021 2:55 PM UTC

So programming with ST-LINKV2 (e.g Nucleo board) then I will boot from user code?

STM32MP151AAC3 custom board with STM32-OS as operating system: https://github.com/DanielMartensson/STM32-ComputerSTM32MP257FAK3 custom board with STM64-OS as operating system: https://github.com/DanielMartensson/STM64-Computer
TDK
TDKBest answer
Jun 10, 2021 2:58 PM UTC
It depends on how BOOT0 is wired and the relevant option bytes. I would imagine the nucleo board is set up to run user code automatically, but I'm not going to double check.
"If you feel a post has answered your question, please click ""Accept as Solution""."
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