BOOT0 pin and BOOT bits

[tomm5771]

I am using an STM32 G474RE NUCLEO board. Is it necessary for me to configure the BOOT0 pin and the BOOT bits in the FLASH_OPTR register if I am going to program the chip using the SWDIO and SWCLK pins with an ST-LINK V2?

[SofLit · Accepted solution]

Hello,

No need to touch anyhting if you plan to use the debug.

Keep boot0 pin tied to GND and Boot bits to default state.

[roger99]

Hello,

Reading this thread I need a bit of clarity.

I currently use mostly STM32L series controllers. On board builds I use PA13,PA14 to a simple 5 pin header along with VDD, GND and nRST. I use the ST-LINK pod to flash and debug. I'm using IAR EWARM to program and debug, this has been working fine for years.

I want to move to the STM32G series. If I plan to use the G0 devices in the same manner as with the L4, do I need to add a (0 ohm) pull down to GND on SWCLK (PA14-BOOT0)?  If doing this will this allow it to boot normally with the ST-LINK attached?I'm under the impression that it will but don't want to commit to a build unless I do. The post above from SofLit says: "Keep boot0 pin tied to GND and Boot bits to default state." I assume the NUCLEO board has a shunt/pull down attached to PA14...

I think I understand that I can then change the bits at some point to change the flash mode if required.

Thanks!

Gary

[SofLit]

Hello @roger99 ,

I suggest you to open a new thread for your questions.

Thank you for your understanding.