ATXMEGA64A1-CU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATXMEGA64A1-CU

8/16-bit XMEGA A1 Microcontroller

Atmel Corporation 

14.3.1 Push-pull

Figure 14-1. I/O configuration - Totem-pole

DIRn

OUTn

INn

XMEGA A1

Pn

14.3.2 Pull-down

Figure 14-2. I/O configuration - Totem-pole with pull-down (on input)

DIRn

OUTn

Pn

INn

14.3.3 Pull-up

Figure 14-3. I/O configuration - Totem-pole with pull-up (on input)

DIRn

OUTn

Pn

INn

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’.

28

8067L–AVR–08/10

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