ATXMEGA384A1-CU ATMEL [ATMEL Corporation], ATXMEGA384A1-CU Datasheet - Page 27

• Manufacturer Part Number: ATXMEGA384A1-CU
• Description: 8/16-bit XMEGA A1 Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

14.3.1
14.3.2
14.3.3
14.3.4
8067D–AVR–08/08
Push-pull
Pull-down
Pull-up
Bus-keeper
Figure 14-1. I/O configuration - Totem-pole
Figure 14-2. I/O configuration - Totem-pole with pull-down (on input)
Figure 14-3. I/O configuration - Totem-pole with pull-up (on input)
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’.
OUTn
OUTn
DIRn
OUTn
DIRn
DIRn
INn
INn
INn
Pn
Pn
Pn
XMEGA A1
27