48
8068C–AVR–06/08
XMEGA A3
29. Pinout and Pin Functions
The pinout of XMEGA A3 is shown in ”Pinout/Block Diagram” on page 2. In addition to general
I/O functionality, each pin may have several function. This will depend on which peripheral is
enabled and connected to the actual pin. Only one of the alternate pin functions can be used at
time.
29.1 Alternate Pin Function Description
The tables below show the notation for all pin functions available and describe its function.
29.1.1 Operation/Power Supply
29.1.2 Port Interrupt functions
29.1.3 Analog functions
VCC Digital supply voltage
AVCC Analog supply voltage
GND Ground
SYNC Port pin with full synchronous and limited asynchronous interrupt function
ASYNC Port pin with full synchronous and full asynchronous interrupt function
ACn Analog Comparator input pin n
AC0OUT Analog Comparator 0 Output
ADCn Analog to Digital Converter input pin n
DACn Digital to Analog Converter output pin n
AREF Analog Reference input pin
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