circuitpython/stm/boards/PYBOARD4/pins.csv

1	X1	PA0
2	X2	PA1
3	X3	PA2
4	X4	PA3
5	X5	PA4
6	X6	PA5
7	X7	PA6
8	X8	PA7
9	X9	PB6
10	X10	PB7
11	X11	PC4
12	X12	PC5
13	X13	Reset
14	X14	GND
15	X15	3.3V
16	X16	VIN
17	X17	PB3
18	X18	PC13
19	X19	PC0
20	X20	PC1
21	X21	PC2
22	X22	PC3
23	X23	A3.3V
24	X24	AGND
25	Y1	PC6
26	Y2	PC7
27	Y3	PB8
28	Y4	PB9
29	Y5	PB12
30	Y6	PB13
31	Y7	PB14
32	Y8	PB15
33	Y9	PB10
34	Y10	PB11
35	Y11	PB0
36	Y12	PB1
37	Y13	Reset
38	Y14	GND
39	Y15	3.3V
40	Y16	VIN
41	LED_BLUE	PB4
42	LED_RED	PA13
43	LED_GREEN	PA14
44	LED_YELLOW	PA15
45	SW	PB3