Datasheet

10
32099G–06/2011
AT32UC3L016/32/64
See Section 3.3 for a description of the various peripheral signals.
Refer to ”Electrical Characteristics” on page 41 for a description of the electrical properties of the
pin types used.
3.2.1.1 TWI, 5V Tolerant, and SMBUS Pins
Some Normal I/O pins have TWI, 5V Tolerant, and SMBUS features. These features are avail-
able only when TWI functions or the PWMAOD function of the PWMA are selected on these
pins.
40 PA19 19 VDDIO
Normal
I/O
A D C I F B
AD[5]
T C 0
A2
T W I M S 1
TWALM
P W M A
PWMA[19]
C A T
SYNC
C A T
CSA[10]
25 PA20 20 VDDIN
Normal
I/O
U S A R T 2
TXD
T C 0
A1
G L O C
IN[3]
P W M A
PWMA[20]
S C I F
RC32OUT
C A T
CSA[12]
24 PA21 21 VDDIN
Normal
I/O (TWI,
5V
tolerant
SMBus)
U S A R T 2
RXD
T W I M S 0
TWD
T C 0
B1
A D C I F B
TRIGGER
P W M A
PWMA[21]
P W M A
PWMAOD[21]
S C I F
GCLK[0]
C A T
SMP
9 PA22 22 VDDIO
Normal
I/O
U S A R T 0
CTS
U S A R T 2
CLK
T C 0
B2
C A T
SMP
P W M A
PWMA[22]
A C I F B
ACBN[2]
C A T
CSB[10]
6 PB00 32 VDDIO
Normal
I/O
U S A R T 3
TXD
A D C I F B
ADP[0]
S P I
NPCS[0]
T C 0
A1
P W M A
PWMA[23]
A C I F B
ACAP[2]
T C 1
A0
C A T
CSA[9]
16 PB01 33 VDDIO
High-
drive I/O
U S A R T 3
RXD
A D C I F B
ADP[1]
S P I
SCK
T C 0
B1
P W M A
PWMA[24]
T C 1
A1
C A T
CSB[9]
7 PB02 34 VDDIO
Normal
I/O
U S A R T 3
RTS
U S A R T 3
CLK
S P I
MISO
T C 0
A2
P W M A
PWMA[25]
A C I F B
ACAN[2]
S C I F
GCLK[1]
C A T
CSB[11]
8 PB03 35 VDDIO
Normal
I/O
U S A R T 3
CTS
U S A R T 3
CLK
S P I
MOSI
T C 0
B2
P W M A
PWMA[26]
A C I F B
ACBP[2]
T C 1
A2
C A T
CSA[11]
21 PB04 36 VDDIN
Normal
I/O (TWI,
5V
tolerant
SMBus)
T C 1
A0
U S A R T 1
RTS
U S A R T 1
CLK
T W I M S 0
TWALM
P W M A
PWMA[27]
P W M A
PWMAOD[27]
T W I M S 1
TWCK
C A T
CSA[14]
20 PB05 37 VDDIN
Normal
I/O (TWI,
5V
tolerant
SMBus)
T C 1
B0
U S A R T 1
CTS
U S A R T 1
CLK
T W I M S 0
TWCK
P W M A
PWMA[28]
P W M A
PWMAOD[28]
S C I F
GCLK[3]
C A T
CSB[14]
30 PB06 38 VDDIO
Normal
I/O
T C 1
A1
U S A R T 3
TXD
A D C I F B
AD[6]
G L O C
IN[2]
P W M A
PWMA[29]
A C I F B
ACAN[3]
E I C
EXTINT[0]
C A T
CSB[13]
31 PB07 39 VDDIO
Normal
I/O
T C 1
B1
U S A R T 3
RXD
A D C I F B
AD[7]
G L O C
IN[1]
P W M A
PWMA[30]
A C I F B
ACAP[3]
E I C
EXTINT[1]
C A T
CSA[13]
32 PB08 40 VDDIO
Normal
I/O
T C 1
A2
U S A R T 3
RTS
A D C I F B
AD[8]
G L O C
IN[0]
P W M A
PWMA[31]
C A T
SYNC
E I C
EXTINT[2]
C A T
CSB[12]
29 PB09 41 VDDIO
Normal
I/O
T C 1
B2
U S A R T 3
CTS
U S A R T 3
CLK
P W M A
PWMA[32]
A C I F B
ACBN[1]
E I C
EXTINT[3]
C A T
CSB[15]
23 PB10 42 VDDIN
Normal
I/O
T C 1
CLK0
U S A R T 1
TXD
U S A R T 3
CLK
G L O C
OUT[1]
P W M A
PWMA[33]
E I C
EXTINT[4]
C A T
CSB[16]
44 PB11 43 VDDIO
Normal
I/O
T C 1
CLK1
U S A R T 1
RXD
A D C I F B
TRIGGER
P W M A
PWMA[34]
C A T
VDIVEN
E I C
EXTINT[5]
C A T
CSA[16]
5 PB12 44 VDDIO
Normal
I/O
T C 1
CLK2
T W I M S 1
TWALM
C A T
SYNC
P W M A
PWMA[35]
A C I F B
ACBP[3]
S C I F
GCLK[4]
C A T
CSA[15]
Table 3-1. GPIO Controller Function Multiplexing