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Should I use an external resistor to pull up the boot pin?

Question asked by László Monda on Apr 17, 2017
Latest reply on Apr 26, 2017 by László Monda

Hi guys,

 

I use the KL03 and I'll unset the BOOTPIN_OPT flag of the FTFA_FOPT register. I'd like to make the user able to short GND and the boot pin during reset to trigger the bootloader as a safety firmware upgrade method.

 

My question is whether I need to use a pull-up resistor for the boot pin, or is the internal pull-up sufficient.

 

Thanks in advance!

- Laci

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