ATXMEGA256A3BU Datasheet, PDF (57/143 Pages) ATMEL Corporation – 8/16-bit Atmel XMEGA A3BUMicrocontroller

33.2
Alternate Pin Functions
The tables below show the primary/default function for each pin on a port in the first column, the pin number in the
second column, and then all alternate pin functions in the remaining columns. The head row shows what peripheral that
enable and use the alternate pin functions.
For better flexibility, some alternate functions also have selectable pin locations for their functions, this is noted under the
first table where this apply.
Table 33-1. Port A - alternate functions.
PORT A
GND
AVCC
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PIN #
60
61
62
63
64
1
2
3
4
5
INTERRUPT
SYNC
SYNC
SYNC/ASYNC
SYNC
SYNC
SYNC
SYNC
SYNC
ADCA POS/
GAINPOS
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
ADCB
POS
ADC8
ADC9
ADC10
ADC11
ADC12
ADC13
ADC14
ADC15
ADCA
NEG
ADCA
GAINNEG
ACA
POS
ADC0
AC0
ADC1
AC1
ADC2
AC2
ADC3
AC3
ADC4
AC4
ADC5
AC5
ADC6
AC6
ADC7
ACA
NEG
ACA
OUT
REFA
AC0
AREF
AC1
AC3
AC5
AC1OUT
AC7
AC0OUT
Table 33-2. Port B - alternate functions.
PORT B
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
GND
VCC
PIN #
6
7
8
9
10
11
12
13
14
15
INTERRUPT
SYNC
SYNC
SYNC/ASYNC
SYNC
SYNC
SYNC
SYNC
SYNC
ADCA POS
ADC8
ADC9
ADC10
ADC11
ADC12
ADC13
ADC14
ADC15
ADCB POS/
GAINPOS
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
ADCB
NEG
ADC0
ADC1
ADC2
ADC3
ADCB
GAINNEG
ADC4
ADC5
ADC6
ADC7
ACB
POS
AC0
AC1
AC2
AC3
AC4
AC5
AC6
ACB
NEG
AC0
AC1
AC3
AC5
AC7
ACB
OUT
AC1OUT
AC0OUT
DACB
DAC0
DAC1
REFB JTAG
AREF
TMS
TDI
TCK
TDO
XMEGA A3BU [DATASHEET]
57
8362F–AVR–02/2013