This is the documentation for the latest development branch of MicroPython and may refer to features that are not available in released versions.

If you are looking for the documentation for a specific release, use the drop-down menu on the left and select the desired version.

Pinout for the SAMD machine modules

The assignment of device functions to pins is very flexible. The same function may be used at different pins. The representation of the assignment choices are given by a table, which is a subset of the MCU’s Pin MUX table and is specific to each board, as the available pin set varies. The structure of the table is the same for each board, but the set of rows is different.

Adafruit ItsyBitsy M0 Express pin assignment table

Pin

GPIO

Pin name

IRQ

ADC

Serial

Serial

TCC/TC

TCC/TC

0

PA11

D0

11

19

0/3

2/3

1/1

0/3

1

PA10

D1

10

18

0/2

2/2

1/0

0/2

2

PA14

D2

14

2/2

4/2

3/0

0/4

3

PA09

D3

9

17

0/1

2/1

0/1

1/3

4

PA08

D4

16

0/0

2/0

0/0

1/2

5

PA15

D5

15

2/3

4/3

3/1

0/5

7

PA21

D7

5

5/3

3/3

7/1

0/7

9

PA07

D9

7

7

0/3

1/1

10

PA18

D10

2

1/2

3/2

3/0

0/2

11

PA16

D11

0

1/0

3/0

2/0

0/6

12

PA19

D12

3

1/3

3/3

3/1

0/3

13

PA17

D13

1

1/1

3/1

2/1

0/7

14

PA02

A0

2

0

15

PB08

A1

8

2

4/0

4/0

16

PB09

A2

9

3

4/1

4/1

17

PA04

A3

4

4

0/0

0/0

18

PA05

A4

5

5

0/1

0/1

19

PB02

A5

2

5/0

6/0

20

PA22

SDA

6

3/0

5/0

4/0

0/4

21

PA23

SCL

7

3/1

5/1

4/1

0/5

22

PB10

MOSI

10

4/2

5/0

0/4

23

PA12

MISO

12

2/0

4/0

2/0

0/6

24

PB11

SCK

11

4/3

5/1

0/5

25

PA00

DOTSTAR_CLK

0

1/0

2/0

26

PA01

DOTSTAR_DATA

1

1/1

2/1

27

PB22

FLASH_MOSI

6

5/2

7/0

28

PB03

FLASH_MISO

3

5/1

6/1

29

PB23

FLASH_SCK

7

5/3

7/1

Description of the columns:

  • Pin - The number that is expected at machine.Pin(n), if the pin is given as a number. This is NOT the GPIO number, but the board pin number, as given in the board specific definition file.

  • GPIO - The GPIO number.

  • Pin Name - The name of a Pin which is expected argument to machine.Pin("name").

  • IRQ - The IRQ number assigned to that GPIO, used internally by Pin.irq(). When using Pin.irq(), different pins must use different IRQs

  • ADC - The ADC channel assigned to the pin. When using ADC, different pins must not use the same ADC channel.

  • Serial - Two columns with optional Serial signal assignments. Both may be used. The cell content is device #/pad #. The pad # is the respective internal signal of that serial device. Details below.

  • TCC/TC - Two columns with assignments of the TCC modules for PWM. The cell content is device #/output #. For PWM, devices 0, 1, and 2 are used. The TC device pair 3/4 is used for ticks_us().

SAMD21 UART assignments

The UART devices and signals must be chosen according to the following rules:

  • The TX signal must be at a Pin with pad numbers 2 or 0, like Pin D1 with serial device 0 or 2.

  • The RX pin may be assigned to one of the other pads.

Examples for Adafruit ItsyBitsy M0 Express:

  • uart 0 at pins D0/D1 This is the default UART at the RX/TX labelled pins

  • uart 1 at pins D12/D10

  • uart 2 at pins D0/D1

  • uart 3 at pins D11/D13

  • uart 4 at pins D2/D5

  • uart 5 at pins SCL/SDA

or other combinations.

SAMD21 I2C assignments

The I2C devices and signals must be chosen according to the following rules:

  • The SDA signal must be at a Pin with pad numbers 0.

  • The SCL signal must be at a Pin with pad numbers 1.

Examples for Adafruit ItsyBitsy M0 Express:

  • I2C 0 at Pin A3/A4

  • I2C 1 at pins D11/D13

  • I2C 2 at the pins D4/D3

  • I2C 3 at the pins SDA/SCL This is the default I2C device at the SDA/SCl labelled pin

  • I2C 4 at the pins A1/A2

  • I2C 5 at the pins SDA/SCL,

or other combinations.

SAMD21 SPI assignments

The I2C devices and signals must be chosen according to the following rules:

  • The following pad number pairs are suitable for MOSI/SCK: 0/1, 2/3, 3/1, and 0/3.

  • The MISO signal must be at a Pin with a different pad number than MOSI or SCK.

Examples for Adafruit ItsyBitsy M0 Express:

  • SPI 0 at pins D0/D4/D1

  • SPI 1 at pins D11/D12/D13

  • SPI 2 at pins D0/D4/D1

  • SPI 3 at pins D11/D12/D13

  • SPI 4 at Pin MOSI/MISO/SCK This is the default SPI device at the MOSI/MISO/SCK labelled pins.

or other combinations.

SAMD21 PWM assignments

The TCC/TC device numbers 0, 1 and 2 can be used for PWM. Device 0 has four channels, device 1 and 2 have two channels. So in total 3 different PWM frequencies can be used, and 8 different duty cycle values.

The DAC output for the Adafruit ItsyBitsy M0 Express board is available at the pin A0.

Adafruit ItsyBitsy M4 Express pin assignment table

Pin

GPIO

Pin name

IRQ

ADC

ADC

Serial

Serial

TC

PWM

PWM

2

PA02

A0

2

0

5

PA05

A1

5

5

0/1

0/1

40

PB08

A2

8

2

0

4/0

4/0

41

PB09

A3

9

3

1

4/1

4/1

4

PA04

A4

4

4

0/0

0/0

6

PA06

A5

6

6

0/2

1/0

16

PA16

D0

0

1/0

3/1

2/0

1/0

0/4

17

PA17

D1

1

1/1

3/0

2/1

1/1

0/5

7

PA07

D2

7

7

0/3

1/1

54

PB22

D3

22

1/2

5/2

7/0

14

PA14

D4

14

2/2

4/2

3/0

2/0

1/2

15

PA15

D5

15

2/3

4/3

3/1

2/1

1/3

18

PA18

D7

2

1/2

3/2

3/0

1/2

0/6

19

PA19

D9

3

1/3

3/3

3/1

1/3

0/7

20

PA20

D10

4

5/2

3/2

7/0

1/4

0/0

21

PA21

D11

5

5/3

3/3

7/1

1/5

0/1

23

PA23

D12

7

3/1

5/0

4/1

1/7

0/3

22

PA22

D13

6

3/0

5/1

4/0

1/6

0/2

34

PB02

DOTSTAR_CLK

2

14

5/0

6/0

2/2

35

PB03

DOTSTAR_DATA

9

15

5/1

6/1

43

PB11

FLASH_CS

12

4/3

5/1

0/5

1/1

11

PA11

FLASH_HOLD

11

11

0/3

2/3

1/1

0/3

1/7

9

PA09

FLASH_MISO

9

9

3

0/1

2/0

0/1

0/1

1/5

8

PA08

FLASH_MOSI

8

2

0/0

2/1

0/0

0/0

1/4

42

PB10

FLASH_SCK

10

4/2

5/0

0/4

1/0

10

PA10

FLASH_WP

10

10

0/2

2/2

1/0

0/2

1/6

55

PB23

MISO

7

1/3

5/3

7/1

0

PA00

MOSI

0

1/0

2/0

1

PA01

SCK

1

1/1

2/1

13

PA13

SCL

13

2/1

4/0

2/1

0/7

1/3

12

PA12

SDA

12

2/0

4/1

2/0

0/6

1/2

30

PA30

SWCLK

14

7/2

1/2

6/0

2/0

31

PA31

SWDIO

15

7/3

1/3

6/1

2/1

24

PA24

USB_DM

8

3/2

5/2

5/0

2/2

25

PA25

USB_DP

9

3/3

5/3

5/1

3

PA03

3

10

27

PA27

11

Description of the columns:

  • Pin - The number that is expected at machine.Pin(n), if the pin is given as a number. This is NOT the GPIO number, but the board pin number, as given in the board specific definition file.

  • GPIO - The GPIO number.

  • Pin Name The name of a Pin which is expected argument to machine.Pin("name").

  • IRQ - The IRQ number assigned to that GPIO, used internally by Pin.irq(). When using Pin.irq(), different pins must use different IRQs

  • ADC - The ADC0/1 channel assigned to the pin. When using ADC, different pins must not use the same ADC device and channel.

  • Serial - Two columns with optional Serial signal assignments. Both may be used. The cell content is device #/pad #. The pad # is the respective internal signal of that serial device. Details below.

  • TC - These device are currently not assigned to Pin. the TC device pair 0/1 is used for ticks_us().

  • PWM - Two columns with assignments of the TCC modules for PWM The cell content is device #/output #. Details below.

SAMD51 UART assignments

The UART devices and signals must be chosen according to the following rules:

  • The TX signal must be at a Pin with pad numbers 0, like Pin D1 with serial device 3.

  • The RX pin may be assigned to one of the other pads.

Examples for Adafruit ItsyBitsy 4 Express:

  • uart 0 at pins A4/A1

  • uart 1 at pins D1/D0 This is the default UART at the RX/TX labelled pins

  • uart 2 at pins SCL/SDA This is the default I2C device at the SDA/SCl labelled pin

  • uart 3 at pins D0/D1

  • uart 4 at pins SDA/SCL

  • uart 5 at pins D12/D13

or other combinations.

SAMD51 I2C assignments

The I2C devices and signals must be chosen according to the following rules:

  • The SDA signal must be at a Pin with pad numbers 0.

  • The SCL signal must be at a Pin with pad numbers 1.

Examples for Adafruit ItsyBitsy M0 Express:

  • I2C 0 at pins A3/A4

  • I2C 1 at pins D0/D1

  • I2C 2 at the pins SDA/SCL

  • I2C 3 at the pins D1/D0

  • I2C 4 at the pins A2/A3

  • I2C 5 at the pins D12/D13

or other combinations.

SAMD51 SPI assignments

The SPI devices and signals must be chosen according to the following rules:

  • The following pad number pairs are suitable for MOSI/SCK: 0/1 and 3/1.

  • The MISO signal must be at a Pin with a different pad number than MOSI or SCK.

Examples for Adafruit ItsyBitsy M0 Express:

  • SPI 1 at Pin MOSI/MISO/SCK This is the default SPI device at the MOSI/MISO/SCK labelled pins.

  • SPI 3 at pins D13/D11/D12

  • SPI 5 at pins D12/D3/D13

or other combinations.

SAMD51 PWM assignments

The TCC/PWM device numbers 0 through 4 can be used for PWM. Device 0 has six channels, device 1 has four channels, device 2 has three channels and devices 3 and 4 have two channels. So in total up to 5 different PWM frequencies can be used, and up to 17 different duty cycle values. Note that these numbers do not apply to every board.

The DAC outputs for the Adafruit ItsyBitsy M4 Express board are available at the pins A0 and A1.

Adafruit Feather M4 Express pin assignment table

Pin

GPIO

Pin name

IRQ

ADC

ADC

Serial

Serial

TC

PWM

PWM

2

PA02

A0

2

0

5

PA05

A1

5

5

0/1

0/1

40

PB08

A2

8

2

0

4/0

4/0

41

PB09

A3

9

3

1

4/1

4/1

4

PA04

A4

4

4

0/0

0/0

38

PB06

A5

6

8

49

PB17

D0

1

5/1

6/1

3/1

0/5

48

PB16

D1

0

5/0

6/0

3/0

0/4

14

PA14

D4

14

2/2

4/2

3/0

2/0

1/2

16

PA16

D5

0

1/0

3/1

2/0

1/0

0/4

18

PA18

D6

2

1/2

3/2

3/0

1/2

0/6

19

PA19

D9

3

1/3

3/3

3/1

1/3

0/7

3

PA03

AREF

3

10

20

PA20

D10

4

5/2

3/2

7/0

1/4

0/0

21

PA21

D11

5

5/3

3/3

7/1

1/5

0/1

22

PA22

D12

6

3/0

5/1

4/0

1/6

0/2

23

PA23

D13

7

3/1

5/0

4/1

1/7

0/3

43

PB11

FLASH_CS

12

4/3

5/1

0/5

1/1

11

PA11

FLASH_HOLD

11

11

0/3

2/3

1/1

0/3

1/7

9

PA09

FLASH_MISO

9

9

3

0/1

2/0

0/1

0/1

1/5

8

PA08

FLASH_MOSI

8

2

0/0

2/1

0/0

0/0

1/4

42

PB10

FLASH_SCK

10

4/2

5/0

0/4

1/0

10

PA10

FLASH_WP

10

10

0/2

2/2

1/0

0/2

1/6

54

PB22

MISO

22

1/2

5/2

7/0

55

PB23

MOSI

7

1/3

5/3

7/1

35

PB03

NEOPIXEL

9

15

5/1

6/1

17

PA17

SCK

1

1/1

3/0

2/1

1/1

0/5

13

PA13

SCL

13

2/1

4/0

2/1

0/7

1/3

12

PA12

SDA

12

2/0

4/1

2/0

0/6

1/2

30

PA30

SWCLK

14

7/2

1/2

6/0

2/0

31

PA31

SWDIO

15

7/3

1/3

6/1

2/1

24

PA24

USB_DM

8

3/2

5/2

5/0

2/2

25

PA25

USB_DP

9

3/3

5/3

5/1

33

PB01

VDIV

1

13

5/3

7/1

0

PA00

0

1/0

2/0

1

PA01

1

1/1

2/1

6

PA06

6

6

0/2

1/0

7

PA07

7

7

0/3

1/1

15

PA15

15

2/3

4/3

3/1

2/1

1/3

27

PA27

11

32

PB00

9

12

5/2

7/0

34

PB02

2

14

5/0

6/0

2/2

36

PB04

4

6

37

PB05

5

7

39

PB07

7

9

44

PB12

12

4/0

4/0

3/0

0/0

45

PB13

13

4/1

4/1

3/1

0/1

46

PB14

14

4/2

5/0

4/0

0/2

47

PB15

15

4/3

5/1

4/1

0/3

62

PB30

14

7/0

5/1

0/0

4/0

0/6

63

PB31

15

7/1

5/0

0/1

4/1

0/7

For the definition of the table columns see the explanation at the table for Adafruit ItsyBitsy M4 Express Adafruit ItsyBitsy M4 Express pin assignment table.

The default devices at the board are:

  • UART 5 at pins D0/D1, labelled RX/TX

  • I2C 2 at pins PA12/PA13, labelled SDA/SCL

  • SPI 1 at pins PA23/PA22/PA17, labelled MOSI, MISO and SCK

  • DAC output on pins PA02 and PA05, labelled A0 and A1

SEEED XIAO pin assignment table

Pin

GPIO

Pin name

IRQ

ADC

Serial

Serial

TCC/TC

TCC/TC

2

PA02

A0_D0

2

0

4

PA04

A1_D1

4

4

0/0

0/0

10

PA10

A2_D2

10

18

0/2

2/2

1/0

0/2

11

PA11

A3_D3

11

19

0/3

2/3

1/1

0/3

8

PA08

A4_D4

16

0/0

2/0

0/0

1/2

9

PA09

A5_D5

9

17

0/1

2/1

0/1

1/3

40

PB08

A6_D6

8

2

4/0

4/0

41

PB09

A7_D7

9

3

4/1

4/1

7

PA07

A8_D8

7

7

0/3

1/1

5

PA05

A9_D9

5

5

0/1

0/1

6

PA06

A10_D10

6

6

0/2

1/0

18

PA18

RX_LED

2

1/2

3/2

3/0

0/2

30

PA30

SWCLK

10

1/2

1/0

31

PA31

SWDIO

11

1/3

1/1

19

PA19

TX_LED

3

1/3

3/3

3/1

0/3

24

PA24

USB_DM

12

3/2

5/2

5/0

1/2

25

PA25

USB_DP

13

3/3

5/3

5/1

1/3

17

PA17

USER_LED

1

1/1

3/1

2/1

0/7

0

PA00

0

1/0

2/0

1

PA01

1

1/1

2/1

3

PA03

3

1

12

PA12

12

2/0

4/0

2/0

0/6

13

PA13

13

2/1

4/1

2/0

0/7

14

PA14

14

2/2

4/2

3/0

0/4

15

PA15

15

2/3

4/3

3/1

0/5

16

PA16

0

1/0

3/0

2/0

0/6

20

PA20

4

5/2

3/2

7/0

0/4

21

PA21

5

5/3

3/3

7/1

0/7

22

PA22

6

3/0

5/0

4/0

0/4

23

PA23

7

3/1

5/1

4/1

0/5

27

PA27

15

28

PA28

8

34

PB02

2

10

5/0

6/0

35

PB03

3

11

5/1

6/1

42

PB10

10

4/2

5/0

0/4

43

PB11

11

4/3

5/1

0/5

54

PB22

6

5/2

7/0

55

PB23

7

5/3

7/1

For the definition of the table columns see the explanation at the table for Adafruit ItsyBitsy M0 Express Adafruit ItsyBitsy M0 Express pin assignment table.

The default devices at the board are:

  • UART 4 at pins PB08/PB09, labelled A6_D6/A7_D7

  • I2C 2 at pins PA08/PA09, labelled A4_D4/A5_D5

  • SPI 0 at pins PA06/PA05/PA07, labelled A10_D10, A9_D9 and A8_D8

  • DAC output on pin PA02, labelled A0_D0

Adafruit Feather M0 Express pin assignment table

Pin

GPIO

Pin name

IRQ

ADC

Serial

Serial

TCC/TC

TCC/TC

2

PA02

A0

2

0

40

PB08

A1

8

2

4/0

4/0

41

PB09

A2

9

3

4/1

4/1

4

PA04

A3

4

4

0/0

0/0

5

PA05

A4

5

5

0/1

0/1

34

PB02

A5

2

10

5/0

6/0

11

PA11

D0

11

19

0/3

2/3

1/1

0/3

10

PA10

D1

10

18

0/2

2/2

1/0

0/2

14

PA14

D2

14

2/2

4/2

3/0

0/4

9

PA09

D3

9

17

0/1

2/1

0/1

1/3

8

PA08

D4

16

0/0

2/0

0/0

1/2

15

PA15

D5

15

2/3

4/3

3/1

0/5

20

PA20

D6

4

5/2

3/2

7/0

0/4

21

PA21

D7

5

5/3

3/3

7/1

0/7

7

PA07

D9

7

7

0/3

1/1

55

PB23

RX

7

5/3

7/1

54

PB22

TX

6

5/2

7/0

18

PA18

D10

2

1/2

3/2

3/0

0/2

16

PA16

D11

0

1/0

3/0

2/0

0/6

19

PA19

D12

3

1/3

3/3

3/1

0/3

17

PA17

D13

1

1/1

3/1

2/1

0/7

13

PA13

FLASH_CS

13

2/1

4/1

2/0

0/7

35

PB03

LED_RX

3

11

5/1

6/1

27

PA27

LED_TX

15

12

PA12

MISO

12

2/0

4/0

2/0

0/6

42

PB10

MOSI

10

4/2

5/0

0/4

6

PA06

NEOPIXEL

6

6

0/2

1/0

43

PB11

SCK

11

4/3

5/1

0/5

23

PA23

SCL

7

3/1

5/1

4/1

0/5

22

PA22

SDA

6

3/0

5/0

4/0

0/4

30

PA30

SWCLK

10

1/2

1/0

31

PA31

SWDIO

11

1/3

1/1

24

PA24

USB_DM

12

3/2

5/2

5/0

1/2

25

PA25

USB_DP

13

3/3

5/3

5/1

1/3

0

PA00

0

1/0

2/0

1

PA01

1

1/1

2/1

3

PA03

3

1

28

PA28

8

For the definition of the table columns see the explanation at the table for Adafruit ItsyBitsy M0 Express Adafruit ItsyBitsy M0 Express pin assignment table.

The default devices at the board are:

  • UART 5 at pins PB23/PB22, labelled RX/TX

  • I2C 3 at pins PA22/PA23, labelled SDA/SCL

  • SPI 4 at pins PA10/PA12/PA11, labelled MOSI, MISO and SCK

  • DAC output on pin PA02, labelled A0

Adafruit Trinket M0 pin assignment table

Pin

GPIO

Pin name

IRQ

ADC

Serial

Serial

TCC/TC

TCC/TC

8

PA08

D0

16

0/0

2/0

0/0

1/2

2

PA02

D1

2

0

9

PA09

D2

9

17

0/1

2/1

0/1

1/3

7

PA07

D3

7

7

0/3

1/1

6

PA06

D4

6

6

0/2

1/0

1

PA01

DOTSTAR_CLK

1

1/1

2/1

0

PA00

DOTSTAR_DATA

0

1/0

2/0

10

PA10

LED

10

18

0/2

2/2

1/0

0/2

30

PA30

SWCLK

10

1/2

1/0

31

PA31

SWDIO

11

1/3

1/1

24

PA24

USB_DM

12

3/2

5/2

5/0

1/2

25

PA25

USB_DP

13

3/3

5/3

5/1

1/3

3

PA03

3

1

4

PA04

4

4

0/0

0/0

5

PA05

5

5

0/1

0/1

11

PA11

11

19

0/3

2/3

1/1

0/3

14

PA14

14

2/2

4/2

3/0

0/4

15

PA15

15

2/3

4/3

3/1

0/5

16

PA16

0

1/0

3/0

2/0

0/6

17

PA17

1

1/1

3/1

2/1

0/7

18

PA18

2

1/2

3/2

3/0

0/2

19

PA19

3

1/3

3/3

3/1

0/3

22

PA22

6

3/0

5/0

4/0

0/4

23

PA23

7

3/1

5/1

4/1

0/5

27

PA27

15

28

PA28

8

For the definition of the table columns see the explanation at the table for Adafruit ItsyBitsy M0 Express Adafruit ItsyBitsy M0 Express pin assignment table.

The default devices at the board are:

  • UART 0 at pins PA07/PA06, labelled D3/D4

  • I2C 2 at pins PA08/PA09, labelled D0/D2

  • SPI 0 at pins PA06/PA09/PA08, labelled D4, D2 and D0

  • DAC output on pin PA02, labelled D1

SAMD21 Xplained PRO pin assignment table

Pin

GPIO

Pin name

IRQ

ADC

Serial

Serial

TCC/TC

TCC/TC

32

PB00

EXT1_PIN3

0

8

5/2

7/0

33

PB01

EXT1_PIN4

1

9

5/3

7/1

38

PB06

EXT1_PIN5

6

14

39

PB07

EXT1_PIN6

7

15

34

PB02

EXT1_PIN7

2

10

5/0

6/0

35

PB03

EXT1_PIN8

3

11

5/1

6/1

36

PB04

EXT1_PIN9

4

12

37

PB05

EXT1_PIN10

5

13

8

PA08

EXT1_PIN11

16

0/0

2/0

0/0

1/2

9

PA09

EXT1_PIN12

9

17

0/1

2/1

0/1

1/3

41

PB09

EXT1_PIN13

9

3

4/1

4/1

40

PB08

EXT1_PIN14

8

2

4/0

4/0

5

PA05

EXT1_PIN15

5

5

0/1

0/1

6

PA06

EXT1_PIN16

6

6

0/2

1/0

4

PA04

EXT1_PIN17

4

4

0/0

0/0

7

PA07

EXT1_PIN18

7

7

0/3

1/1

10

PA10

EXT2_PIN3

10

18

0/2

2/2

1/0

0/2

11

PA11

EXT2_PIN4

11

19

0/3

2/3

1/1

0/3

20

PA20

EXT2_PIN5

4

5/2

3/2

7/0

0/4

21

PA21

EXT2_PIN6

5

5/3

3/3

7/1

0/7

44

PB12

EXT2_PIN7

12

4/0

4/0

0/6

45

PB13

EXT2_PIN8

13

4/1

4/1

0/7

46

PB14

EXT2_PIN9

14

4/2

5/0

47

PB15

EXT2_PIN10

15

4/3

5/1

43

PB11

EXT2_PIN13

11

4/3

5/1

0/5

42

PB10

EXT2_PIN14

10

4/2

5/0

0/4

17

PA17

EXT2_PIN15

1

1/1

3/1

2/1

0/7

18

PA18

EXT2_PIN16

2

1/2

3/2

3/0

0/2

16

PA16

EXT2_PIN17

0

1/0

3/0

2/0

0/6

19

PA19

EXT2_PIN18

3

1/3

3/3

3/1

0/3

2

PA02

EXT3_PIN3

2

0

3

PA03

EXT3_PIN4

3

1

15

PA15

EXT3_PIN6

15

2/3

4/3

3/1

0/5

12

PA12

EXT3_PIN7

12

2/0

4/0

2/0

0/6

13

PA13

EXT3_PIN8

13

2/1

4/1

2/0

0/7

28

PA28

EXT3_PIN9

8

27

PA27

EXT3_PIN10

15

49

PB17

EXT3_PIN15

1

5/1

6/1

0/5

54

PB22

EXT3_PIN16

6

5/2

7/0

48

PB16

EXT3_PIN17

9

5/0

6/0

0/4

55

PB23

EXT3_PIN18

7

5/3

7/1

62

PB30

LED

14

5/0

0/0

1/2

30

PA30

SWCLK

10

1/2

1/0

31

PA31

SWDIO

11

1/3

1/1

24

PA24

USB_DM

12

3/2

5/2

5/0

1/2

25

PA25

USB_DP

13

3/3

5/3

5/1

1/3

0

PA00

0

1/0

2/0

1

PA01

1

1/1

2/1

14

PA14

14

2/2

4/2

3/0

0/4

22

PA22

6

3/0

5/0

4/0

0/4

23

PA23

7

3/1

5/1

4/1

0/5

63

PB31

15

5/1

0/1

1/3

For the definition of the table columns see the explanation at the table for Adafruit ItsyBitsy M0 Express Adafruit ItsyBitsy M0 Express pin assignment table.

There are no pins labelled for default devices on this board. DAC output is on pin PA02, labelled EXT3_PIN3

Minisam M4 pin assignment table

Pin

GPIO

Pin name

IRQ

ADC

ADC

Serial

Serial

TC

PWM

PWM

16

PA16

D0

0

1/0

3/1

2/0

1/0

0/4

17

PA17

D1

1

1/1

3/0

2/1

1/1

0/5

19

PA19

D3

3

1/3

3/3

3/1

1/3

0/7

20

PA20

D4

4

5/2

3/2

7/0

1/4

0/0

21

PA21

D5

5

5/3

3/3

7/1

1/5

0/1

2

PA02

A0_D9

2

0

40

PB08

A1_D10

8

2

0

4/0

4/0

41

PB09

A2_D11

9

3

1

4/1

4/1

4

PA04

A3_D12

4

4

0/0

0/0

5

PA05

A4_D13

5

5

0/1

0/1

6

PA06

A5

6

6

0/2

1/0

7

PA07

A6_D2

7

7

0/3

1/1

3

PA03

AREF

3

10

0

PA00

BUTTON

0

1/0

2/0

34

PB02

DOTSTAR_CLK

2

14

5/0

6/0

2/2

35

PB03

DOTSTAR_DATA

9

15

5/1

6/1

15

PA15

LED

15

2/3

4/3

3/1

2/1

1/3

55

PB23

MISO

7

1/3

5/3

7/1

54

PB22

MOSI

22

1/2

5/2

7/0

1

PA01

SCK

1

1/1

2/1

13

PA13

SCL

13

2/1

4/0

2/1

0/7

1/3

12

PA12

SDA

12

2/0

4/1

2/0

0/6

1/2

30

PA30

SWCLK

14

7/2

1/2

6/0

2/0

31

PA31

SWDIO

15

7/3

1/3

6/1

2/1

24

PA24

USB_DM

8

3/2

5/2

5/0

2/2

25

PA25

USB_DP

9

3/3

5/3

5/1

8

PA08

8

2

0/0

2/1

0/0

0/0

1/4

9

PA09

9

9

3

0/1

2/0

0/1

0/1

1/5

10

PA10

10

10

0/2

2/2

1/0

0/2

1/6

11

PA11

11

11

0/3

2/3

1/1

0/3

1/7

14

PA14

14

2/2

4/2

3/0

2/0

1/2

18

PA18

2

1/2

3/2

3/0

1/2

0/6

22

PA22

6

3/0

5/1

4/0

1/6

0/2

23

PA23

7

3/1

5/0

4/1

1/7

0/3

27

PA27

11

42

PB10

10

4/2

5/0

0/4

1/0

43

PB11

12

4/3

5/1

0/5

1/1

For the definition of the table columns see the explanation at the table for Adafruit ItsyBitsy M4 Express Adafruit ItsyBitsy M4 Express pin assignment table.

The default devices at the board are:

  • UART 1 at pins PA16/PA17, labelled D0/D1

  • I2C 2 at pins PA12/PA13, labelled SDA/SCL

  • SPI 1 at pins PB22/PB23/PA01, labelled MOSI, MISO and SCK

  • DAC output on pins PA02 and PA05, labelled A0_D9 and A4_D13

Seeed WIO Terminal pin assignment table

Pin

GPIO

Pin name

IRQ

ADC

ADC

Serial

Serial

TC

PWM

PWM

33

PB01

CS

1

13

5/3

7/1

59

PB27

RX

13

2/1

4/0

1/3

58

PB26

TX

12

2/0

4/1

1/2

79

PC15

3V3_ENABLE

15

7/3

6/3

0/5

1/1

78

PC14

5V_ENABLE

14

7/2

6/2

0/4

1/0

40

PB08

A0_D0

8

2

0

4/0

4/0

41

PB09

A1_D1

9

3

1

4/1

4/1

7

PA07

A2_D2

7

7

0/3

1/1

36

PB04

A3_D3

4

6

37

PB05

A4_D4

5

7

38

PB06

A5_D5

6

8

4

PA04

A6_D6

4

4

0/0

0/0

39

PB07

A7_D7

7

9

6

PA06

A8_D8

6

6

0/2

1/0

90

PC26

BUTTON_1

10

91

PC27

BUTTON_2

11

1/0

92

PC28

BUTTON_3

12

1/1

107

PD11

BUZZER

6

7/3

6/3

0/4

47

PB15

GPCLK0

15

4/3

5/1

4/1

0/3

44

PB12

GPCLK1

12

4/0

4/0

3/0

0/0

45

PB13

GPCLK2

13

4/1

4/1

3/1

0/1

48

PB16

I2C_BCLK

0

5/0

6/0

3/0

0/4

20

PA20

I2S_LRCLK

4

5/2

3/2

7/0

1/4

0/0

21

PA21

I2S_SDIN

5

5/3

3/3

7/1

1/5

0/1

22

PA22

I2S_SDOUT

6

3/0

5/1

4/0

1/6

0/2

50

PB18

LCD_MISO

2

5/2

7/2

1/0

51

PB19

LCD_MOSI

3

5/3

7/3

1/1

52

PB20

LCD_SCK

4

3/0

7/1

1/2

53

PB21

LCD_CS

5

3/1

7/0

1/3

70

PC06

LCD_D/C

6

6/2

71

PC07

LCD_RESET

9

6/3

74

PC10

LCD_XL

10

6/2

7/2

0/0

1/4

76

PC12

LCD_XR

12

7/0

6/1

0/2

1/6

77

PC13

LCD_YD

13

7/1

6/0

0/3

1/7

75

PC11

LCD_YU

11

6/3

7/3

0/1

1/5

15

PA15

LED_BLUE

15

2/3

4/3

3/1

2/1

1/3

69

PC05

LED_LCD

5

6/1

94

PC30

MIC

14

12

32

PB00

MISO

9

12

5/2

7/0

34

PB02

MOSI

2

14

5/0

6/0

2/2

35

PB03

SCK

9

15

5/1

6/1

12

PA12

SCL0

12

2/0

4/1

2/0

0/6

1/2

13

PA13

SDA0

13

2/1

4/0

2/1

0/7

1/3

16

PA16

SCL1

0

1/0

3/1

2/0

1/0

0/4

17

PA17

SDA1

1

1/1

3/0

2/1

1/1

0/5

117

PD21

SD_DET

11

1/3

3/3

1/1

83

PC19

SD_CS

3

6/3

0/3

0/3

82

PC18

SD_MISO

2

6/2

0/2

0/2

80

PC16

SD_MOSI

0

6/0

0/1

0/0

81

PC17

SD_SCK

1

6/1

0/0

0/1

30

PA30

SWCLK

14

7/2

1/2

6/0

2/0

31

PA31

SWDIO

15

7/3

1/3

6/1

2/1

108

PD12

SWITCH_B

7

0/5

116

PD20

SWITCH_U

10

1/2

3/2

1/0

104

PD08

SWITCH_X

3

7/0

6/1

0/1

105

PD09

SWITCH_Y

4

7/1

6/0

0/2

106

PD10

SWITCH_Z

5

7/2

6/2

0/3

24

PA24

USB_DM

8

3/2

5/2

5/0

2/2

25

PA25

USB_DP

9

3/3

5/3

5/1

0

PA00

0

1/0

2/0

1

PA01

1

1/1

2/1

2

PA02

2

0

3

PA03

3

10

5

PA05

5

5

0/1

0/1

8

PA08

8

2

0/0

2/1

0/0

0/0

1/4

9

PA09

9

9

3

0/1

2/0

0/1

0/1

1/5

10

PA10

10

10

0/2

2/2

1/0

0/2

1/6

11

PA11

11

11

0/3

2/3

1/1

0/3

1/7

14

PA14

14

2/2

4/2

3/0

2/0

1/2

18

PA18

2

1/2

3/2

3/0

1/2

0/6

19

PA19

3

1/3

3/3

3/1

1/3

0/7

23

PA23

7

3/1

5/0

4/1

1/7

0/3

27

PA27

11

42

PB10

10

4/2

5/0

0/4

1/0

43

PB11

12

4/3

5/1

0/5

1/1

46

PB14

14

4/2

5/0

4/0

0/2

49

PB17

1

5/1

6/1

3/1

0/5

54

PB22

22

1/2

5/2

7/0

55

PB23

7

1/3

5/3

7/1

56

PB24

8

0/0

2/1

57

PB25

9

0/1

2/0

60

PB28

14

2/2

4/2

1/4

61

PB29

15

2/3

4/3

1/5

62

PB30

14

7/0

5/1

0/0

4/0

0/6

63

PB31

15

7/1

5/0

0/1

4/1

0/7

64

PC00

0

10

65

PC01

1

11

66

PC02

2

4

67

PC03

3

5

68

PC04

4

6/0

0/0

84

PC20

4

0/4

85

PC21

5

0/5

86

PC22

6

1/0

3/1

0/5

87

PC23

7

1/1

3/0

0/7

88

PC24

8

0/2

2/2

89

PC25

9

0/3

2/3

95

PC31

15

13

96

PD00

0

14

97

PD01

1

15

For the definition of the table columns see the explanation at the table for Adafruit ItsyBitsy M4 Express Adafruit ItsyBitsy M4 Express pin assignment table.

Default pin assignments: - UART 2 at pins PB27 and PB26, labelled RX and TX - I2C 4 at pins PA12 and PA13, labelled SCL0 and SDA0 - I2C 3 at pins PA16 and PA17, labelled SCL1 and SDA1 - SPI 5 at pins PB00, PB02 and PB03, labelle MISO, MOSI and SCK

There seems to be no default pin assignment for this board.

Sparkfun SAMD51 Thing Plus pin assignment table

Pin

GPIO

Pin name

IRQ

ADC

ADC

Serial

Serial

TC

PWM

PWM

2

PA02

A0

2

0

40

PB08

A1

8

2

0

4/0

4/0

41

PB09

A2

9

3

1

4/1

4/1

4

PA04

A3

4

4

0/0

0/0

5

PA05

A4

5

5

0/1

0/1

34

PB02

A5

2

14

5/0

6/0

2/2

13

PA13

D0

13

2/1

4/0

2/1

0/7

1/3

12

PA12

D1

12

2/0

4/1

2/0

0/6

1/2

6

PA06

D4

6

6

0/2

1/0

15

PA15

D5

15

2/3

4/3

3/1

2/1

1/3

20

PA20

D6

4

5/2

3/2

7/0

1/4

0/0

21

PA21

D7

5

5/3

3/3

7/1

1/5

0/1

7

PA07

D9

7

7

0/3

1/1

18

PA18

D10

2

1/2

3/2

3/0

1/2

0/6

16

PA16

D11

0

1/0

3/1

2/0

1/0

0/4

19

PA19

D12

3

1/3

3/3

3/1

1/3

0/7

17

PA17

D13

1

1/1

3/0

2/1

1/1

0/5

10

PA10

FLASH_CS

10

10

0/2

2/2

1/0

0/2

1/6

11

PA11

FLASH_MISO

11

11

0/3

2/3

1/1

0/3

1/7

8

PA08

FLASH_MOSI

8

2

0/0

2/1

0/0

0/0

1/4

9

PA09

FLASH_SCK

9

9

3

0/1

2/0

0/1

0/1

1/5

43

PB11

MISO

12

4/3

5/1

0/5

1/1

44

PB12

MOSI

12

4/0

4/0

3/0

0/0

55

PB23

RXD

7

1/3

5/3

7/1

35

PB03

RXLED

9

15

5/1

6/1

45

PB13

SCK

13

4/1

4/1

3/1

0/1

23

PA23

SCL

7

3/1

5/0

4/1

1/7

0/3

22

PA22

SDA

6

3/0

5/1

4/0

1/6

0/2

30

PA30

SWCLK

14

7/2

1/2

6/0

2/0

31

PA31

SWDIO

15

7/3

1/3

6/1

2/1

54

PB22

TXD

22

1/2

5/2

7/0

27

PA27

TXLED

11

24

PA24

USB_DM

8

3/2

5/2

5/0

2/2

25

PA25

USB_DP

9

3/3

5/3

5/1

0

PA00

0

1/0

2/0

1

PA01

1

1/1

2/1

3

PA03

3

10

14

PA14

14

2/2

4/2

3/0

2/0

1/2

32

PB00

9

12

5/2

7/0

33

PB01

1

13

5/3

7/1

36

PB04

4

6

37

PB05

5

7

38

PB06

6

8

39

PB07

7

9

42

PB10

10

4/2

5/0

0/4

1/0

46

PB14

14

4/2

5/0

4/0

0/2

47

PB15

15

4/3

5/1

4/1

0/3

48

PB16

0

5/0

6/0

3/0

0/4

49

PB17

1

5/1

6/1

3/1

0/5

62

PB30

14

7/0

5/1

0/0

4/0

0/6

63

PB31

15

7/1

5/0

0/1

4/1

0/7

For the definition of the table columns see the explanation at the table for Adafruit ItsyBitsy M4 Express Adafruit ItsyBitsy M4 Express pin assignment table.

The default devices at the board are:

  • UART 1 at pins PB23/PB22, labelled RXD/TXD

  • I2C 5 at pins PA22/PA23, labelled SDA/SCL

  • SPI 4 at pins PB12/PB11/PB13, labelled MOSI, MISO and SCK

  • DAC output on pins PA02 and PA05, labelled A0 and A4

Scripts for creating the pin assignment tables

The tables shown above were created with small a Python script running on the target board:

from samd import pininfo
from machine import Pin
import os

def print_entry(e, txt):
    print(txt, end=": ")
    if e == 255:
        print(" - ", end="")
    else:
        print("%d/%d" % (e >> 4, e & 0x0f), end="")

def print_pininfo(pin, info):
    print("%3d" % pin, end=" ")
    print("P%c%02d" % ("ABCD"[pin // 32], pin % 32), end="")
    print(" %12s" % info[0], end="")
    print(" IRQ:%2s" % (info[1] if info[1] != 255 else "-"), end="")
    print(" ADC0:%2s" % (info[2] if info[2] != 255 else "-"), end="")
    if len(info) == 7:
        print_entry(info[3], " Serial1")
        print_entry(info[4], " Serial2")
        print_entry(info[5], " PWM1" if (info[5] >> 4) < 3 else "   TC")
        print_entry(info[6], " PWM2")
    else:
        print(" ADC1:%2s" % (info[3] if info[3] != 255 else "-"), end="")
        print_entry(info[4], " Serial1")
        print_entry(info[5], " Serial2")
        print_entry(info[6], " TC")
        print_entry(info[7], " PWM1")
        print_entry(info[8], " PWM2")
    print()

def tblkey(i):
    name = i[1][0]
    if name != "-":
        if len(name) < 3:
            return " " + name
        else:
            return name
    else:
        return "zzzzzzz%03d" % i[0]

def table(num = 127):
    pintbl = []
    for i in range(num):
        try:
            pintbl.append((i, pininfo(i)))
        except:
            pass
            # print("not defined")

    pintbl.sort(key=tblkey)
    for item in pintbl:
        print_pininfo(item[0], item[1])

table()