ATUC256L4U-AUT Datasheet ATUC256L3U-Z3UT, ATUC256L4U-AUT | P10-P12

32142DS–06/2013

ATUC64/128/256L3/4U

Peripheral Multiplexing on I/O lines

3.1.1 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-

64-

Name

O Supply

Pad

Type

GPIO Function

ABCDE F GH

11 15 PA00 0 VDDIO

Normal

I/O

USART0-

TXD

USART1-

RTS

SPI-

NPCS[2]

PWMA-

PWMA[0]

SCIF-

GCLK[0]

CAT-

CSA[2]

14 18 PA01 1 VDDIO

Normal

I/O

USART0-

RXD

USART1-

CTS

SPI-

NPCS[3]

USART1-

CLK

PWMA-

PWMA[1]

ACIFB-

ACAP[0]

TWIMS0-

TWALM

CAT-

CSA[1]

13 17 PA02 2 VDDIO

High-

drive I/O

USART0-

RTS

ADCIFB-

TRIGGER

USART2-

TXD

TC0-A0

PWMA-

PWMA[2]

ACIFB-

ACBP[0]

USART0-

CLK

CAT-

CSA[3]

4 6 PA03 3 VDDIO

Normal

I/O

USART0-

CTS

SPI-

NPCS[1]

USART2-

TXD

TC0-B0

PWMA-

PWMA[3]

ACIFB-

ACBN[3]

USART0-

CLK

CAT-

CSB[3]

28 38 PA04 4 VDDIO

Normal

I/O

SPI-MISO

TWIMS0-

TWCK

USART1-

RXD

TC0-B1

PWMA-

PWMA[4]

ACIFB-

ACBP[1]

CAT-

CSA[7]

12 16 PA05 5 VDDIO

Normal

I/O (TWI)

SPI-MOSI

TWIMS1-

TWCK

USART1-

TXD

TC0-A1

PWMA-

PWMA[5]

ACIFB-

ACBN[0]

TWIMS0-

TWD

CAT-

CSB[7]

10 14 PA06 6 VDDIO

High-

drive I/O,

tolerant

SPI-SCK

USART2-

TXD

USART1-

CLK

TC0-B0

PWMA-

PWMA[6]

EIC-

EXTINT[2]

SCIF-

GCLK[1]

CAT-

CSB[1]

19 PA07 7 VDDIO

Normal

I/O (TWI)

SPI-

NPCS[0]

USART2-

RXD

TWIMS1-

TWALM

TWIMS0-

TWCK

PWMA-

PWMA[7]

ACIFB-

ACAN[0]

EIC-

NMI

(EXTINT[0])

CAT-

CSB[2]

3 3 PA08 8 VDDIO

High-

drive I/O

USART1-

TXD

SPI-

NPCS[2]

TC0-A2

ADCIFB-

ADP[0]

PWMA-

PWMA[8]

CAT-

CSA[4]

2 2 PA09 9 VDDIO

High-

drive I/O

USART1-

RXD

SPI-

NPCS[3]

TC0-B2

ADCIFB-

ADP[1]

PWMA-

PWMA[9]

SCIF-

GCLK[2]

EIC-

EXTINT[1]

CAT-

CSB[4]

46 62 PA10 10 VDDIO

Normal

I/O

TWIMS0-

TWD

TC0-A0

PWMA-

PWMA[10]

ACIFB-

ACAP[1]

SCIF-

GCLK[2]

CAT-

CSA[5]

27 35 PA11 11 VDDIN

Normal

I/O

PWMA-

PWMA[11]

47 63 PA12 12 VDDIO

Normal

I/O

USART2-

CLK

TC0-CLK1 CAT-SMP

PWMA-

PWMA[12]

ACIFB-

ACAN[1]

SCIF-

GCLK[3]

CAT-

CSB[5]

26 34 PA13 13 VDDIN

Normal

I/O

GLOC-

OUT[0]

GLOC-

IN[7]

TC0-A0

SCIF-

GCLK[2]

PWMA-

PWMA[13]

CAT-SMP

EIC-

EXTINT[2]

CAT-

CSA[0]

36 48 PA14 14 VDDIO

Normal

I/O

ADCIFB-

AD[0]

TC0-CLK2

USART2-

RTS

CAT-SMP

PWMA-

PWMA[14]

SCIF-

GCLK[4]

CAT-

CSA[6]

37 49 PA15 15 VDDIO

Normal

I/O

ADCIFB-

AD[1]

TC0-CLK1

GLOC-

IN[6]

PWMA-

PWMA[15]

CAT-

SYNC

EIC-

EXTINT[3]

CAT-

CSB[6]

38 50 PA16 16 VDDIO

Normal

I/O

ADCIFB-

AD[2]

TC0-CLK0

GLOC-

IN[5]

PWMA-

PWMA[16]

ACIFB-

ACREFN

EIC-

EXTINT[4]

CAT-

CSA[8]

32142DS–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[

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,

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,

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,

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[

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

32142DS–06/2013

ATUC64/128/256L3/4U

3.2 See Section 3.3 for a description of the various peripheral signals.

Refer to ”Electrical Characteristics” on page 991 for a description of the electrical properties of

the pin types used.

3.2.1 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 ”Electrical Characteristics” on page 991 for a description of the electrical properties

of the TWI, 5V tolerance, and SMBUS pins.

57 PB15 47 VDDIO

High-

drive I/O

ABDACB-

CLK

IISC-

IMCK

SPI-SCK TC0-CLK2

PWMA-

PWMA[8]

SCIF-

GCLK[3]

CAT-

CSB[4]

58 PB16 48 VDDIO

Normal

I/O

ABDACB-

DAC[0]

IISC-ISCK

USART0-

TXD

PWMA-

PWMA[9]

SCIF-

GCLK[2]

CAT-

CSA[5]

59 PB17 49 VDDIO

Normal

I/O

ABDACB-

DAC[1]

IISC-IWS

USART0-

RXD

PWMA-

PWMA[10]

CAT-

CSB[5]

60 PB18 50 VDDIO

Normal

I/O

ABDACB-

DACN[0]

IISC-ISDI

USART0-

RTS

PWMA-

PWMA[12]

CAT-

CSA[0]

4 PB19 51 VDDIO

Normal

I/O

ABDACB-

DACN[1]

IISC-ISDO

USART0-

CTS

PWMA-

PWMA[20]

EIC-

EXTINT[1]

CAT-

CSA[12]

5 PB20 52 VDDIO

Normal

I/O

TWIMS1-

TWD

USART2-

RXD

SPI-

NPCS[1]

TC0-A0

PWMA-

PWMA[21]

USART1-

RTS

USART1-

CLK

CAT-

CSA[14]

40 PB21 53 VDDIO

Normal

I/O

TWIMS1-

TWCK

USART2-

TXD

SPI-

NPCS[2]

TC0-B0

PWMA-

PWMA[28]

USART1-

CTS

USART1-

CLK

CAT-

CSB[14]

41 PB22 54 VDDIO

Normal

I/O

TWIMS1-

TWALM

SPI-

NPCS[3]

TC0-CLK0

PWMA-

PWMA[27]

ADCIFB-

TRIGGER

SCIF-

GCLK[0]

CAT-

CSA[8]

54 PB23 55 VDDIO

Normal

I/O

SPI-MISO

USART2-

RTS

USART2-

CLK

TC0-A2

PWMA-

PWMA[0]

CAT-SMP

SCIF-

GCLK[6]

CAT-

CSA[4]

55 PB24 56 VDDIO

Normal

I/O

SPI-MOSI

USART2-

CTS

USART2-

CLK

TC0-B2

PWMA-

PWMA[1]

ADCIFB-

ADP[1]

SCIF-

GCLK[7]

CAT-

CSA[2]

61 PB25 57 VDDIO

Normal

I/O

SPI-

NPCS[0]

USART1-

RXD

TC0-A1

PWMA-

PWMA[2]

SCIF-

GCLK_IN[

SCIF-

GCLK[8]

CAT-

CSA[3]

21 PB26 58 VDDIO

Normal

I/O

SPI-SCK

USART1-

TXD

TC0-B1

PWMA-

PWMA[3]

ADCIFB-

ADP[0]

SCIF-

GCLK[9]

CAT-

CSB[3]

24 PB27 59 VDDIN

Normal

I/O

USART1-

RXD

TC0-CLK1

PWMA-

PWMA[4]

ADCIFB-

ADP[1]

EIC-

NMI

(EXTINT[0])

CAT-

CSA[9]

Table 3-1. GPIO Controller Function Multiplexing

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P27 P28-P30 P31-P33 P34-P36 P37-P39 P40-P42 P43-P45

ATUC256L4U-AUT

Mfr. #:

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Description:

32-bit Microcontrollers - MCU UC3L-256KB Fl 48QFP 85C Grn

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