Datasheet

28
8068U–AVR–06/2013
XMEGA A3
Not recommended for new designs -
Use XMEGA A3U series
15.3.1 Push-pull
Figure 15-1.
I/O configuration - Totem-pole
15.3.2 Pull-down
Figure 15-2.
I/O configuration - Totem-pole with pull-down (on input)
15.3.3 Pull-up
Figure 15-3.
I/O configuration - Totem-pole with pull-up (on input)
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’.
INn
OUTn
DIRn
Pn
INn
OUTn
DIRn
Pn
INn
OUTn
DIRn
Pn