ATXMEGA256A3BU Datasheet, PDF (32/143 Pages) ATMEL Corporation – 8/16-bit Atmel XMEGA A3BUMicrocontroller

Figure 16-4. I/O configuration - Totem-pole with bus-keeper.
DIRn
OUTn
Pn
INn
16.3.5 Others
Figure 16-5. Output configuration - Wired-OR with optional pull-down.
OUTn
Pn
INn
Figure 16-6. I/O configuration - Wired-AND with optional pull-up.
INn
Pn
OUTn
16.4
Input sensing
Input sensing is synchronous or asynchronous depending on the enabled clock for the ports, and the configuration is
shown in Figure 16-7 on page 33.
XMEGA A3BU [DATASHEET]
32
8362F–AVR–02/2013