Datasheet

 2018 Microchip Technology Inc. Data Sheet Complete DS40002058A-page 38
ATxmega128A1U/ATxmega64A1U
15.3.4 Bus-keeper
The bus-keeper’s weak output produces the same logical level as the last output level. It acts as a pull-up if the last level
was ‘1’, and pull-down if the last level was ‘0’.
Figure 15-4. I/O configuration - Totem-pole with bus-keeper.
15.3.5 Others
Figure 15-5. Output configuration - Wired-OR with optional pull-down.
Figure 15-6. I/O configuration - Wired-AND with optional pull-up.
INn
OUTn
DIRn
Pn
INn
OUTn
Pn
INn
OUTn
Pn