Datasheet

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[Not recommended for new designs - Use XMEGA A1U series] XMEGA A1 [DATASHEET]
8067O–AVR–06/2013
30. Pinout and Pin Functions
The pinout of XMEGA A1 is shown in “Pinout/Block Diagram” on page 3. In addition to general I/O functionality, each pin
may have several functions. 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.
30.1 Alternate Pin Function Description
The tables below shows the notation for all pin functions available and describes its function.
30.1.1 Operation/Power Supply
30.1.2 Port Interrupt functions
30.1.3 Analog functions
30.1.4 EBI functions
V
CC
Digital supply voltage
AV
CC
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
An Address line n
Dn Data line n
CSn Chip Select n
ALEn Address Latch Enable pin n (SRAM)
RE Read Enable (SRAM)
WE External Data Memory Write (SRAM /SDRAM)
BAn Bank Address (SDRAM)
CAS Column Access Strobe (SDRAM)
CKE SDRAM Clock Enable (SDRAM)