
11
32142D–06/2013
ATUC64/128/256L3/4U
39
51
PA17
17
VDDIO
Normal
I/O (TWI)
TC0-A1
USART2-
CTS
TWIMS1-
TWD
PWMA-
PWMA[17]
CAT-SMP
CAT-DIS
CAT-
CSB[8]
41
53
PA18
18
VDDIO
Normal
I/O
ADCIFB-
AD[4]
TC0-B1
GLOC-
IN[4]
PWMA-
PWMA[18]
CAT-
SYNC
EIC-
EXTINT[5]
CAT-
CSB[0]
40
52
PA19
19
VDDIO
Normal
I/O
ADCIFB-
AD[5]
TC0-A2
TWIMS1-
TWALM
PWMA-
PWMA[19]
SCIF-
GCLK_IN[
0]
CAT-SYNC
CAT-
CSA[10]
25
33
PA20
20
VDDIN
Normal
I/O
USART2-
TXD
TC0-A1
GLOC-
IN[3]
PWMA-
PWMA[20]
SCIF-
RC32OUT
CAT-
CSA[12]
24
32
PA21
21
VDDIN
Normal
I/O (TWI,
5V
tolerant,
SMBus)
USART2-
RXD
TWIMS0-
TWD
TC0-B1
ADCIFB-
TRIGGER
PWMA-
PWMA[21]
PWMA-
PWMAOD
[21]
SCIF-
GCLK[0]
CAT-
SMP
9
13
PA22
22
VDDIO
Normal
I/O
USART0-
CTS
USART2-
CLK
TC0-B2
CAT-SMP
PWMA-
PWMA[22]
ACIFB-
ACBN[2]
CAT-
CSB[10]
6
8
PB00
32
VDDIO
Normal
I/O
USART3-
TXD
ADCIFB-
ADP[0]
SPI-
NPCS[0]
TC0-A1
PWMA-
PWMA[23]
ACIFB-
ACAP[2]
TC1-A0
CAT-
CSA[9]
20
PB01
33
VDDIO
High-
drive I/O
USART3-
RXD
ADCIFB-
ADP[1]
SPI-SCK
TC0-B1
PWMA-
PWMA[24]
TC1-A1
CAT-
CSB[9]
7
9
PB02
34
VDDIO
Normal
I/O
USART3-
RTS
USART3-
CLK
SPI-MISO
TC0-A2
PWMA-
PWMA[25]
ACIFB-
ACAN[2]
SCIF-
GCLK[1]
CAT-
CSB[11]
8
10
PB03
35
VDDIO
Normal
I/O
USART3-
CTS
USART3-
CLK
SPI-MOSI
TC0-B2
PWMA-
PWMA[26]
ACIFB-
ACBP[2]
TC1-A2
CAT-
CSA[11]
21
29
PB04
36
VDDIN
Normal
I/O (TWI,
5V
tolerant,
SMBus)
TC1-A0
USART1-
RTS
USART1-
CLK
TWIMS0-
TWALM
PWMA-
PWMA[27]
PWMA-
PWMAOD
[27]
TWIMS1-
TWCK
CAT-
CSA[14]
20
28
PB05
37
VDDIN
Normal
I/O (TWI,
5V
tolerant,
SMBus)
TC1-B0
USART1-
CTS
USART1-
CLK
TWIMS0-
TWCK
PWMA-
PWMA[28]
PWMA-
PWMAOD
[28]
SCIF-
GCLK[3]
CAT-
CSB[14]
30
42
PB06
38
VDDIO
Normal
I/O
TC1-A1
USART3-
TXD
ADCIFB-
AD[6]
GLOC-
IN[2]
PWMA-
PWMA[29]
ACIFB-
ACAN[3]
EIC-
NMI
(EXTINT[0])
CAT-
CSB[13]
31
43
PB07
39
VDDIO
Normal
I/O
TC1-B1
USART3-
RXD
ADCIFB-
AD[7]
GLOC-
IN[1]
PWMA-
PWMA[30]
ACIFB-
ACAP[3]
EIC-
EXTINT[1]
CAT-
CSA[13]
32
44
PB08
40
VDDIO
Normal
I/O
TC1-A2
USART3-
RTS
ADCIFB-
AD[8]
GLOC-
IN[0]
PWMA-
PWMA[31]
CAT-
SYNC
EIC-
EXTINT[2]
CAT-
CSB[12]
29
39
PB09
41
VDDIO
Normal
I/O
TC1-B2
USART3-
CTS
USART3-
CLK
PWMA-
PWMA[32]
ACIFB-
ACBN[1]
EIC-
EXTINT[3]
CAT-
CSB[15]
23
31
PB10
42
VDDIN
Normal
I/O
TC1-CLK0
USART1-
TXD
USART3-
CLK
GLOC-
OUT[1]
PWMA-
PWMA[33]
SCIF-
GCLK_IN[
1]
EIC-
EXTINT[4]
CAT-
CSB[16]
44
56
PB11
43
VDDIO
Normal
I/O
TC1-CLK1
USART1-
RXD
ADCIFB-
TRIGGER
PWMA-
PWMA[34]
CAT-
VDIVEN
EIC-
EXTINT[5]
CAT-
CSA[16]
5
7
PB12
44
VDDIO
Normal
I/O
TC1-CLK2
TWIMS1-
TWALM
CAT-
SYNC
PWMA-
PWMA[35]
ACIFB-
ACBP[3]
SCIF-
GCLK[4]
CAT-
CSA[15]
15
22
PB13
45
VDDIN
USB I/O
USBC-DM
USART3-
TXD
TC1-A1
PWMA-
PWMA[7]
ADCIFB-
ADP[1]
SCIF-
GCLK[5]
CAT-
CSB[2]
16
23
PB14
46
VDDIN
USB I/O
USBC-DP
USART3-
RXD
TC1-B1
PWMA-
PWMA[24]
SCIF-
GCLK[5]
CAT-
CSB[9]
Table 3-1.
GPIO Controller Function Multiplexing