micropython/ports/samd/boards/SAMD21_XPLAINED_PRO/pins.csv

1	# EXT1
2	EXT1_PIN3,PB00
3	EXT1_PIN4,PB01
4	EXT1_PIN5,PB06
5	EXT1_PIN6,PB07
6	EXT1_PIN7,PB02
7	EXT1_PIN8,PB03
8	EXT1_PIN9,PB04
9	EXT1_PIN10,PB05
10	EXT1_PIN11,PA08
11	EXT1_PIN12,PA09
12	EXT1_PIN13,PB09
13	EXT1_PIN14,PB08
14	EXT1_PIN15,PA05
15	EXT1_PIN16,PA06
16	EXT1_PIN17,PA04
17	EXT1_PIN18,PA07
18	# EXT2
19	EXT2_PIN3,PA10
20	EXT2_PIN4,PA11
21	EXT2_PIN5,PA20
22	EXT2_PIN6,PA21
23	EXT2_PIN7,PB12
24	EXT2_PIN8,PB13
25	EXT2_PIN9,PB14
26	EXT2_PIN10,PB15
27	EXT2_PIN13,PB11
28	EXT2_PIN14,PB10
29	EXT2_PIN15,PA17
30	EXT2_PIN16,PA18
31	EXT2_PIN17,PA16
32	EXT2_PIN18,PA19
33	# EXT3
34	EXT3_PIN3,PA02
35	EXT3_PIN4,PA03
36	EXT3_PIN6,PA15
37	EXT3_PIN7,PA12
38	EXT3_PIN8,PA13
39	EXT3_PIN9,PA28
40	EXT3_PIN10,PA27
41	EXT3_PIN15,PB17
42	EXT3_PIN16,PB22
43	EXT3_PIN17,PB16
44	EXT3_PIN18,PB23
45	LED,PB30
46	USB_DM,PA24
47	USB_DP,PA25
48	SWCLK,PA30
49	SWDIO,PA31