Datasheet
9
32099IS–01/2012
AT32UC3L016/32/64
3.2 Peripheral Multiplexing on I/O lines
3.2.1 Multiplexed signals
Each GPIO line can be assigned to one of the peripheral functions.The following table describes
the peripheral signals multiplexed to the GPIO lines.
Table 3-1. GPIO Controller Function Multiplexing
48-
pin PIN
G
P
I
O Supply
Pin
Type
GPIO Function
ABCDE F GH
11 PA00 0 VDDIO
Normal
I/O
U S A R T 0
TXD
U S A R T 1
RTS
S P I
NPCS[2]
P W M A
PWMA[0]
S C I F
GCLK[0]
C A T
CSA[2]
14 PA01 1 VDDIO
Normal
I/O
U S A R T 0
RXD
U S A R T 1
CTS
S P I
NPCS[3]
U S A R T 1
CLK
P W M A
PWMA[1]
A C I F B
ACAP[0]
T W I M S 0
TWALM
C A T
CSA[1]
13 PA02 2 VDDIO
High-
drive I/O
U S A R T 0
RTS
A D C I F B
TRIGGER
U S A R T 2
TXD
T C 0
A0
P W M A
PWMA[2]
A C I F B
ACBP[0]
U S A R T 0
CLK
C A T
CSA[3]
4 PA03 3 VDDIO
Normal
I/O
U S A R T 0
CTS
S P I
NPCS[1]
U S A R T 2
TXD
T C 0
B0
P W M A
PWMA[3]
A C I F B
ACBN[3]
U S A R T 0
CLK
C A T
CSB[3]
28 PA04 4 VDDIO
Normal
I/O
S P I
MISO
T W I M S 0
TWCK
U S A R T 1
RXD
T C 0
B1
P W M A
PWMA[4]
A C I F B
ACBP[1]
C A T
CSA[7]
12 PA05 5 VDDIO
Normal
I/O (TWI)
S P I
MOSI
T W I M S 1
TWCK
U S A R T 1
TXD
T C 0
A1
P W M A
PWMA[5]
A C I F B
ACBN[0]
T W I M S 0
TWD
C A T
CSB[7]
10 PA06 6 VDDIO
High-
drive I/O,
5V
tolerant
S P I
SCK
U S A R T 2
TXD
U S A R T 1
CLK
T C 0
B0
P W M A
PWMA[6]
S C I F
GCLK[1]
C A T
CSB[1]
15 PA07 7 VDDIO
Normal
I/O (TWI)
S P I
NPCS[0]
U S A R T 2
RXD
T W I M S 1
TWALM
T W I M S 0
TWCK
P W M A
PWMA[7]
A C I F B
ACAN[0]
E I C
EXTINT[0]
C A T
CSB[2]
3 PA08 8 VDDIO
High-
drive I/O
U S A R T 1
TXD
S P I
NPCS[2]
T C 0
A2
A D C I F B
ADP[0]
P W M A
PWMA[8]
C A T
CSA[4]
2 PA09 9 VDDIO
High-
drive I/O
U S A R T 1
RXD
S P I
NPCS[3]
T C 0
B2
A D C I F B
ADP[1]
P W M A
PWMA[9]
S C I F
GCLK[2]
E I C
EXTINT[1]
C A T
CSB[4]
46 PA10 10 VDDIO
Normal
I/O
T W I M S 0
TWD
T C 0
A0
P W M A
PWMA[10]
A C I F B
ACAP[1]
S C I F
GCLK[2]
C A T
CSA[5]
27 PA11 11 VDDIN
Normal
I/O
P W M A
PWMA[11]
47 PA12 12 VDDIO
Normal
I/O
U S A R T 2
CLK
T C 0
CLK1
C A T
SMP
P W M A
PWMA[12]
A C I F B
ACAN[1]
S C I F
GCLK[3]
C A T
CSB[5]
26 PA13 13 VDDIN
Normal
I/O
G L O C
OUT[0]
G L O C
IN[7]
T C 0
A0
S C I F
GCLK[2]
P W M A
PWMA[13]
C A T
SMP
E I C
EXTINT[2]
C A T
CSA[0]
36 PA14 14 VDDIO
Normal
I/O
A D C I F B
AD[0]
T C 0
CLK2
U S A R T 2
RTS
C A T
SMP
P W M A
PWMA[14]
S C I F
GCLK[4]
C A T
CSA[6]
37 PA15 15 VDDIO
Normal
I/O
A D C I F B
AD[1]
T C 0
CLK1
G L O C
IN[6]
P W M A
PWMA[15]
C A T
SYNC
E I C
EXTINT[3]
C A T
CSB[6]
38 PA16 16 VDDIO
Normal
I/O
A D C I F B
AD[2]
T C 0
CLK0
G L O C
IN[5]
P W M A
PWMA[16]
A C I F B
ACREFN
E I C
EXTINT[4]
C A T
CSA[8]
39 PA17 17 VDDIO
Normal
I/O (TWI)
T C 0
A1
U S A R T 2
CTS
T W I M S 1
TWD
P W M A
PWMA[17]
C A T
SMP
C A T
DIS
C A T
CSB[8]
41 PA18 18 VDDIO
Normal
I/O
A D C I F B
AD[4]
T C 0
B1
G L O C
IN[4]
P W M A
PWMA[18]
C A T
SYNC
E I C
EXTINT[5]
C A T
CSB[0]