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STM32WBA64CIUx USART BOOTLOADER

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Brussl
Associate III

‎2026-02-16 4:48 AM - last edited on ‎2026-02-27 1:08 AM by

Hi, I have a problem with activating USART bootloader.

I use USART1. Please for details about how to going in bootloader mode. Pattern 12 in  AN2606 is super complicated for me. I use now boot pin. I put it to GND and power ON . By me MCU going in bootloader mode, software put it with J-link is not started, but STM programmer show : Activating device: KO.Please, verify the boot mode configuration and check serial port configuration. Reset your device then try again..

Please for details how to put in USART1 boot mode.

 

 

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Brussl
Associate III
In response to TDK

‎2026-02-23 2:31 AM - edited ‎2026-02-23 2:33 AM

So after 1 week test and attempts I find problem. NEED TO CONNECT VDDUSB to VCC! This is without logic for me. I don't use USB hardware in chip.

I can't find in documents something about that.

 

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