Datasheet

10
32099IS–01/2012
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 offer TWI, 5V Tolerant, and SMBUS features. These features are only
available when either of the TWI functions or the PWMAOD function in the PWMA are selected
for 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