Datasheet

10
32145CS–06/2013
AT32UC3L0128/256
See Section 3.3 for a description of the various peripheral signals.
Refer to ”Electrical Characteristics” on page 791 for a description of the electrical properties of
the pin types used.
3.2.2 TWI, 5V Tolerant, and SMBUS Pins
Some normal I/O pins offer TWI, 5V tolerance, 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.
Refer to the ”TWI Pin Characteristics(1)” on page 798 for a description of the electrical proper-
ties of the TWI, 5V tolerance, and SMBUS pins.
8 PB03 35 VDDIO
Normal
I/O
U S A R T 3
CTS
U S A R T 3
CLK
SP I
MOSI
T C0
B2
P W M A
PWMA[26]
A CI FB
ACBP[2]
TC1
A2
C AT
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]
PW MA
PWMAOD[27]
T W I M S 1
TWCK
C AT
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]
PW MA
PWMAOD[28]
S C I F
GCLK[3]
C AT
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 CI FB
ACAN[3]
EIC
NMI
(EXTINT[0])
C AT
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 CI FB
ACAP[3]
EIC
EXTINT[1]
C AT
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 AT
SYNC
EIC
EXTINT[2]
C AT
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 CI FB
ACBN[1]
EIC
EXTINT[3]
C AT
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]
S C I F
GCLK_IN[1]
EIC
EXTINT[4]
C AT
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 AT
VDIVEN
EIC
EXTINT[5]
C AT
CSA[16]
5 PB12 44 VDDIO
Normal
I/O
T C 1
CLK2
T W I M S 1
TWALM
CA T
SYNC
P W M A
PWMA[35]
A CI FB
ACBP[3]
S C I F
GCLK[4]
C AT
CSA[15]
Table 3-1. GPIO Controller Function Multiplexing