STM8L151F3 - How to select USART pins for serial flashing.

[Aqua Bela]

Posted on June 27, 2018 at 18:18

Hi,

I have an STM8L151F3 MCU on my board.

I'm trying to find info on the default USART pins for using the on-chip serial boot loader together with the flash loader demonstrator by ST.

There are 3 options and couldn't find any clue in any ST document.

Could someone help please.

Regards

[Tesla DeLorean]

Posted on June 28, 2018 at 08:02

Like UM0560 and the pin designations in the Data Sheets?

https://www.st.com/content/ccc/resource/technical/document/user_manual/e4/83/c1/d6/ee/d8/49/b8/CD00201192.pdf/files/CD00201192.pdf/jcr:content/translations/en.CD00201192.pdf

 

https://www.st.com/content/ccc/resource/technical/document/reference_manual/2e/3b/8c/8f/60/af/4b/2c/CD00218714.pdf/files/CD00218714.pdf/jcr:content/translations/en.CD00218714.pdf

 

2 Boot ROM

This section applies to low-density STM8L05xx/STM8L15xx devices, medium-density STM8L05xx/STM8L15xx devices, medium+ density STM8L05xx/STM8L15xx devices and high-density STM8L05xx/STM8L15xx/STM8L16xx devices, unless otherwise specified.

The internal 2 Kbyte boot ROM contains the bootloader code. Its main task is to download the application program to the internal Flash/EEPROM through the USART1, USART2, USART3 (USARTs in asynchronous mode), SPI1 or SPI2 interfaces and program the code, data, option bytes and interrupt vectors in the internal Flash/EEPROM.

Refer to product datasheets for details on available communication ports.

To perform boot loading in LIN mode, a different bootloader communication protocol is

implemented on UART2/UART3 and UART1.

The boot loader starts executing after reset.

Refer to the STM8 bootloader user manual (UM0560) for more details.