Datasheet

29
XMEGA D4 [DATASHEET]
8135P–AVR–01/2014
14.3 Output Driver
All port pins (Pxn) have programmable output configuration.
14.3.1 Push-pull
Figure 14-1. I/O configuration - Totem-pole.
14.3.2 Pull-down
Figure 14-2. I/O configuration - Totem-pole with pull-down (on input).
14.3.3 Pull-up
Figure 14-3. I/O configuration - Totem-pole with pull-up (on input).
14.3.4 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’.
INxn
OUTxn
DIRxn
Pxn
INxn
OUTxn
DIRxn
Pxn
INxn
OUTxn
DIRxn
Pxn