ATtiny3216 Hardware RESET

[PM04290]

As described in datasheet of ATTiny3216, it is possible to make hardware reset with low voltage, but configuration must be enabled by fuse.
On menu UDPI, i have only "No Reset" or "reset enabled for Serie 2"

How to enable hardware reset on ~Reset/UDPI pin ?

[hmeijdam]

Find the "boards.txt" file from MegatinyCore and search for the word "expert". Then you will see that you can uncomment the 'expert mode' features. Make sure you realize that you will need a HV programmer to ever set the UPDI pin back to UPDI. That is why by default these options are commented out.

[PM04290]

@hmeijdam , thanks for solution... but for HV programmer i must learn to it; actually i use simple Nano with jtag2udpi firmware... I suppose it is not an HV programmer

[hmeijdam]

No, but you can make that into a HV programmer