Boot1 pin left floating

udilevy · ‎2016-04-19

Posted on April 19, 2016 at 14:38

Hi,

I am now working on a design with stm32l, the BOOT1 pin was left floating in this design, Is that a valid configuration? Does BOOT1 have a built in pull down/up resistor, or is it an unstable configuration?

Thanks

#stm32 #bootloader

Tesla DeLorean · ‎2016-04-19

Posted on April 19, 2016 at 14:54

BOOT0 would be more concerning, that would want a pull-down.

The general rule is to enforce the behaviour you want externally. The Data Manual should indicate the pin behaviour.

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Nesrine M_O · ‎2016-04-19

Posted on April 19, 2016 at 15:17

Hi levy.udi.001,

I recommend you to have a look to the Getting started hardware application note related to your STM32 product, it gives a hardware implementation overview of the development board features (Boot configuration, Power supplies...)

For example

http://www2.st.com/content/ccc/resource/technical/document/application_note/fd/f4/6b/40/9a/b5/41/a2/DM00112257.pdf/files/DM00112257.pdf/jcr:content/translations/en.DM00112257.pdf

Application note (Getting started with STM32L0xx hardware development)

-Syrine-