4.3.1 Mechanical Buttons
ATtiny817 Xplained Pro contains two generic user-configurable mechanical buttons. When a button is pressed, it will drive the I/O line to GND.
Info: There is
no pull-up resistor connected to the generic user button SW0. Remember to enable the
internal pull-up in the ATtiny817 to use
the button. There is an on-board pull-up resistor connected to the generic user button
SW1. There is no need to enable the internal pull-up in the ATtiny817 to use the button.
| ATtiny817 Pin | Silkscreen Text | Shared Functionality |
|---|---|---|
| PB5 | SW0 | EXT3 and EDBG DGI |
| PC5 | SW1/RST | EXT3 and UPDI debug connector |
Info: PC5 is
connected to a button that states “SW1/RST” because PC5 had reset capabilities in an
early version of the ATtiny817. Today the
ATtiny817 does not have any reset
capabilities on PC5.