ATXMEGA32A4_14 Datasheet, PDF (50/108 Pages) ATMEL Corporation – Non-volatile Program and Data Memories

30.1.5 Communication functions
30.1.6
SCL
SDA
XCKn
RXDn
TXDn
SS
MOSI
MISO
SCK
Serial Clock for TWI
Serial Data for TWI
Transfer Clock for USART n
Receiver Data for USART n
Transmitter Data for USART n
Slave Select for SPI
Master Out Slave In for SPI
Master In Slave Out for SPI
Serial Clock for SPI
Oscillators, Clock and Event
30.1.7
TOSCn
XTALn
Debug/System functions
Timer Oscillator pin n
Input/Output for inverting Oscillator pin n
RESET
PDI_CLK
PDI_DATA
Reset pin
Program and Debug Interface Clock pin
Program and Debug Interface Data pin
XMEGA A4
8069R–AVR–06/2013
50
Not recommended for new designs -
Use XMEGA A4U series