kw32w041 not booting when GPIO5 is held low

jacinto1m — Wed, 16 Jun 2021 13:40:20 GMT

Hi,

I am wondering whether there is anything the the NXP bootloader that prevents the kw32w041 to boot up when I put low the GPIO5 before powering it up.

Any help is much appreciated.

Re: kw32w041 not booting when GPIO5 is held low

Ricardo_Zamora — Wed, 16 Jun 2021 16:47:01 GMT

Hi,

Hope you are doing well. The GPIO5 is also the ISP Entry pin:

[3] ISP programming mode: leave pin floating high during reset to avoid entering UART programming mode or hold it low to program

You can find this information in the Data Sheet.

Best Regards,

Ricardo