Shorting boot pin - which one is it?

Official Hardware Classic UNO R4 Minima
1

Sorry for the basic question, but I did search the forum, promise!

I'm trying to burn the bootloader and the instructions say to short the boot pin to ground.

On the R4 minima, is the boot pin the unlabelled one just above the IOREF pin? When I googled, the only site i found said that this *was historically the boot pin, but it was disconnected in the R4 Minima.

The official Arduino cheat-sheet pinout doesn't mention it at all.

Just wanted to check, if anyone knows.

Thanks

3

Thank you my friend. It is indeed on the silkscreen, just not on the headers. I had to disassemble the shield to see it. I'm a dingaling! Thanks for your help!

4

Just to note that the Boot line is a usable I/O pin, with a 4K7 pull-up, that is handy to have if one is running short of pins and doesn’t need soldering.
As long as it isn’t held low during startup by whatever it connect to of course :slight_smile:

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