FAQs
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 

Status of USART, SPI and CAN in ST bootloader for STM32L4 ?

unterberg_rtb
Associate III

‎2026-03-16 4:54 AM - last edited on ‎2026-03-19 4:49 AM by

New question split from this post.

One additinal request: When checking if bootloader pin configuration has an impact on the real application it would be helpful to know the default level for output pins, like

  • does the UART_TX pin drive active high or low?
  • does the boot loader drive the SPI MISO output pin HI, LO or Z?
  • is the CAN_TX pin drven HI or LOW?

Thank you!

Labels:
0 Kudos
1 REPLY 1
mƎALLEm
ST Employee

‎2026-03-16 5:10 AM

That's a new question that needs to be separated.

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.
0 Kudos
Top