Version: BSP 7.x.y

Is this page helpful?

GPIO Alphanumeric to GPIO Numeric Assignment

GPIO

This article describes the relationship between a SOC's GPIO Name and GPIO number used in various SW APIs.

Most pins on a SOC can be configured for different functions, one of them GPIO.

A SOC pin has an alphanumeric name, the GPIO functionality usually has an alphanumeric name and in the SW APIs the GPIO is often referenced as a number.

To make matters more complicated the SOC pin is then routed to the modules connector and gets an additional module pin name and number.

The WinCE GPIOLib.h provides a MACRO for the conversion from alphanumeric to numbers (TEGRA_GPIONUM). We recommend to use the SODIMM pin number instead of GPIO Numbers for better compatibility with other Colibri modules when ever possible.

The Linux kernel uses the numeric-only representation in its GPIO subsystem and in the sysfs interface to the GPIO functionality.

E.g. on a Colibri T20 the T20 pin SDIO3_DAT0 has the following relationships.

Module Pin Name	Module Pin Number	SOC Pin Name	SOC GPIO Name	GPIO number
GPIO: PS2.SCL1 SODIMM_63	63	SDIO3_DAT0	B7	15

The relationship between Module Pin Name / Module Pin Number / SOC Pin Name / SOC GPIO Name can be found in the modules datasheet.

Apalis iMX8

The i.MX 8 modules have GPIO controllers which can control up to 32 GPIOs. The GPIO names are formed "LSIO.GPIO<controller>.IO<gpio>" with controller in 0..6 and gpio in 00..31.

E.g. a GPIO function could be named LSIO.GPIO2.IO04.

The numeric value is calculated as follows:

480 - 32 x controller + gpio

E.g. LSIO.GPIO0.IO00 becomes 480, LSIO.GPIO2.IO04 becomes 420.

You must find the correspondence between GPIO and the edge connector pin (X1) that you want to use in the CoM datasheet. A good place to start is the SoC Function List:

Apalis iMX8 datasheet - the SoC Function List is on page 21

Apalis iMX8 GPIO table

danger

this table is automatically generated from the formula above. Some of the GPIO lines from the table may not be available in a specific Toradex SoM or NXP SoC.

Gpio	Numeric Representation
LSIO.GPIO00.IO00	480
LSIO.GPIO00.IO01	481
LSIO.GPIO00.IO02	482
LSIO.GPIO00.IO03	483
LSIO.GPIO00.IO04	484
LSIO.GPIO00.IO05	485
LSIO.GPIO00.IO06	486
LSIO.GPIO00.IO07	487
LSIO.GPIO00.IO08	488
LSIO.GPIO00.IO09	489
LSIO.GPIO00.IO10	490
LSIO.GPIO00.IO11	491
LSIO.GPIO00.IO12	492
LSIO.GPIO00.IO13	493
LSIO.GPIO00.IO14	494
LSIO.GPIO00.IO15	495
LSIO.GPIO00.IO16	496
LSIO.GPIO00.IO17	497
LSIO.GPIO00.IO18	498
LSIO.GPIO00.IO19	499
LSIO.GPIO00.IO20	500
LSIO.GPIO00.IO21	501
LSIO.GPIO00.IO22	502
LSIO.GPIO00.IO23	503
LSIO.GPIO00.IO24	504
LSIO.GPIO00.IO25	505
LSIO.GPIO00.IO26	506
LSIO.GPIO00.IO27	507
LSIO.GPIO00.IO28	508
LSIO.GPIO00.IO29	509
LSIO.GPIO00.IO30	510
LSIO.GPIO00.IO31	511
LSIO.GPIO01.IO00	448
LSIO.GPIO01.IO01	449
LSIO.GPIO01.IO02	450
LSIO.GPIO01.IO03	451
LSIO.GPIO01.IO04	452
LSIO.GPIO01.IO05	453
LSIO.GPIO01.IO06	454
LSIO.GPIO01.IO07	455
LSIO.GPIO01.IO08	456
LSIO.GPIO01.IO09	457
LSIO.GPIO01.IO10	458
LSIO.GPIO01.IO11	459
LSIO.GPIO01.IO12	460
LSIO.GPIO01.IO13	461
LSIO.GPIO01.IO14	462
LSIO.GPIO01.IO15	463
LSIO.GPIO01.IO16	464
LSIO.GPIO01.IO17	465
LSIO.GPIO01.IO18	466
LSIO.GPIO01.IO19	467
LSIO.GPIO01.IO20	468
LSIO.GPIO01.IO21	469
LSIO.GPIO01.IO22	470
LSIO.GPIO01.IO23	471
LSIO.GPIO01.IO24	472
LSIO.GPIO01.IO25	473
LSIO.GPIO01.IO26	474
LSIO.GPIO01.IO27	475
LSIO.GPIO01.IO28	476
LSIO.GPIO01.IO29	477
LSIO.GPIO01.IO30	478
LSIO.GPIO01.IO31	479
LSIO.GPIO02.IO00	416
LSIO.GPIO02.IO01	417
LSIO.GPIO02.IO02	418
LSIO.GPIO02.IO03	419
LSIO.GPIO02.IO04	420
LSIO.GPIO02.IO05	421
LSIO.GPIO02.IO06	422
LSIO.GPIO02.IO07	423
LSIO.GPIO02.IO08	424
LSIO.GPIO02.IO09	425
LSIO.GPIO02.IO10	426
LSIO.GPIO02.IO11	427
LSIO.GPIO02.IO12	428
LSIO.GPIO02.IO13	429
LSIO.GPIO02.IO14	430
LSIO.GPIO02.IO15	431
LSIO.GPIO02.IO16	432
LSIO.GPIO02.IO17	433
LSIO.GPIO02.IO18	434
LSIO.GPIO02.IO19	435
LSIO.GPIO02.IO20	436
LSIO.GPIO02.IO21	437
LSIO.GPIO02.IO22	438
LSIO.GPIO02.IO23	439
LSIO.GPIO02.IO24	440
LSIO.GPIO02.IO25	441
LSIO.GPIO02.IO26	442
LSIO.GPIO02.IO27	443
LSIO.GPIO02.IO28	444
LSIO.GPIO02.IO29	445
LSIO.GPIO02.IO30	446
LSIO.GPIO02.IO31	447
LSIO.GPIO03.IO00	384
LSIO.GPIO03.IO01	385
LSIO.GPIO03.IO02	386
LSIO.GPIO03.IO03	387
LSIO.GPIO03.IO04	388
LSIO.GPIO03.IO05	389
LSIO.GPIO03.IO06	390
LSIO.GPIO03.IO07	391
LSIO.GPIO03.IO08	392
LSIO.GPIO03.IO09	393
LSIO.GPIO03.IO10	394
LSIO.GPIO03.IO11	395
LSIO.GPIO03.IO12	396
LSIO.GPIO03.IO13	397
LSIO.GPIO03.IO14	398
LSIO.GPIO03.IO15	399
LSIO.GPIO03.IO16	400
LSIO.GPIO03.IO17	401
LSIO.GPIO03.IO18	402
LSIO.GPIO03.IO19	403
LSIO.GPIO03.IO20	404
LSIO.GPIO03.IO21	405
LSIO.GPIO03.IO22	406
LSIO.GPIO03.IO23	407
LSIO.GPIO03.IO24	408
LSIO.GPIO03.IO25	409
LSIO.GPIO03.IO26	410
LSIO.GPIO03.IO27	411
LSIO.GPIO03.IO28	412
LSIO.GPIO03.IO29	413
LSIO.GPIO03.IO30	414
LSIO.GPIO03.IO31	415
LSIO.GPIO04.IO00	352
LSIO.GPIO04.IO01	353
LSIO.GPIO04.IO02	354
LSIO.GPIO04.IO03	355
LSIO.GPIO04.IO04	356
LSIO.GPIO04.IO05	357
LSIO.GPIO04.IO06	358
LSIO.GPIO04.IO07	359
LSIO.GPIO04.IO08	360
LSIO.GPIO04.IO09	361
LSIO.GPIO04.IO10	362
LSIO.GPIO04.IO11	363
LSIO.GPIO04.IO12	364
LSIO.GPIO04.IO13	365
LSIO.GPIO04.IO14	366
LSIO.GPIO04.IO15	367
LSIO.GPIO04.IO16	368
LSIO.GPIO04.IO17	369
LSIO.GPIO04.IO18	370
LSIO.GPIO04.IO19	371
LSIO.GPIO04.IO20	372
LSIO.GPIO04.IO21	373
LSIO.GPIO04.IO22	374
LSIO.GPIO04.IO23	375
LSIO.GPIO04.IO24	376
LSIO.GPIO04.IO25	377
LSIO.GPIO04.IO26	378
LSIO.GPIO04.IO27	379
LSIO.GPIO04.IO28	380
LSIO.GPIO04.IO29	381
LSIO.GPIO04.IO30	382
LSIO.GPIO04.IO31	383
LSIO.GPIO05.IO00	320
LSIO.GPIO05.IO01	321
LSIO.GPIO05.IO02	322
LSIO.GPIO05.IO03	323
LSIO.GPIO05.IO04	324
LSIO.GPIO05.IO05	325
LSIO.GPIO05.IO06	326
LSIO.GPIO05.IO07	327
LSIO.GPIO05.IO08	328
LSIO.GPIO05.IO09	329
LSIO.GPIO05.IO10	330
LSIO.GPIO05.IO11	331
LSIO.GPIO05.IO12	332
LSIO.GPIO05.IO13	333
LSIO.GPIO05.IO14	334
LSIO.GPIO05.IO15	335
LSIO.GPIO05.IO16	336
LSIO.GPIO05.IO17	337
LSIO.GPIO05.IO18	338
LSIO.GPIO05.IO19	339
LSIO.GPIO05.IO20	340
LSIO.GPIO05.IO21	341
LSIO.GPIO05.IO22	342
LSIO.GPIO05.IO23	343
LSIO.GPIO05.IO24	344
LSIO.GPIO05.IO25	345
LSIO.GPIO05.IO26	346
LSIO.GPIO05.IO27	347
LSIO.GPIO05.IO28	348
LSIO.GPIO05.IO29	349
LSIO.GPIO05.IO30	350
LSIO.GPIO05.IO31	351
LSIO.GPIO06.IO00	288
LSIO.GPIO06.IO01	289
LSIO.GPIO06.IO02	290
LSIO.GPIO06.IO03	291
LSIO.GPIO06.IO04	292
LSIO.GPIO06.IO05	293
LSIO.GPIO06.IO06	294
LSIO.GPIO06.IO07	295
LSIO.GPIO06.IO08	296
LSIO.GPIO06.IO09	297
LSIO.GPIO06.IO10	298
LSIO.GPIO06.IO11	299
LSIO.GPIO06.IO12	300
LSIO.GPIO06.IO13	301
LSIO.GPIO06.IO14	302
LSIO.GPIO06.IO15	303
LSIO.GPIO06.IO16	304
LSIO.GPIO06.IO17	305
LSIO.GPIO06.IO18	306
LSIO.GPIO06.IO19	307
LSIO.GPIO06.IO20	308
LSIO.GPIO06.IO21	309
LSIO.GPIO06.IO22	310
LSIO.GPIO06.IO23	311
LSIO.GPIO06.IO24	312
LSIO.GPIO06.IO25	313
LSIO.GPIO06.IO26	314
LSIO.GPIO06.IO27	315
LSIO.GPIO06.IO28	316
LSIO.GPIO06.IO29	317
LSIO.GPIO06.IO30	318
LSIO.GPIO06.IO31	319

Colibri iMX8X

The i.MX 8X modules have GPIO controllers which can control up to 32 GPIOs. The GPIO names are formed "LSIO.GPIO<controller>.IO<gpio>" with controller in 0..6 and gpio in 00..31.

E.g. a GPIO function could be named LSIO.GPIO2.IO04.

The numeric value is calculated as follows:

32 x controller + gpio

E.g. LSIO.GPIO0.IO00 becomes 0, LSIO.GPIO2.IO04 becomes 68.

You must find the correspondence between GPIO and the edge connector pin (X1) that you want to use in the CoM datasheet. A good place to start is the SoC Function List:

Colibri iMX8X datasheet - the SoC Function List is on page 24

Colibri iMX8X GPIO table

danger

this table is automatically generated from the formula above. Some of the GPIO lines from the table may not be available in a specific Toradex SoM or NXP SoC.

Gpio	Numeric Representation
LSIO.GPIO00.IO00	0
LSIO.GPIO00.IO01	1
LSIO.GPIO00.IO02	2
LSIO.GPIO00.IO03	3
LSIO.GPIO00.IO04	4
LSIO.GPIO00.IO05	5
LSIO.GPIO00.IO06	6
LSIO.GPIO00.IO07	7
LSIO.GPIO00.IO08	8
LSIO.GPIO00.IO09	9
LSIO.GPIO00.IO10	10
LSIO.GPIO00.IO11	11
LSIO.GPIO00.IO12	12
LSIO.GPIO00.IO13	13
LSIO.GPIO00.IO14	14
LSIO.GPIO00.IO15	15
LSIO.GPIO00.IO16	16
LSIO.GPIO00.IO17	17
LSIO.GPIO00.IO18	18
LSIO.GPIO00.IO19	19
LSIO.GPIO00.IO20	20
LSIO.GPIO00.IO21	21
LSIO.GPIO00.IO22	22
LSIO.GPIO00.IO23	23
LSIO.GPIO00.IO24	24
LSIO.GPIO00.IO25	25
LSIO.GPIO00.IO26	26
LSIO.GPIO00.IO27	27
LSIO.GPIO00.IO28	28
LSIO.GPIO00.IO29	29
LSIO.GPIO00.IO30	30
LSIO.GPIO00.IO31	31
LSIO.GPIO01.IO00	32
LSIO.GPIO01.IO01	33
LSIO.GPIO01.IO02	34
LSIO.GPIO01.IO03	35
LSIO.GPIO01.IO04	36
LSIO.GPIO01.IO05	37
LSIO.GPIO01.IO06	38
LSIO.GPIO01.IO07	39
LSIO.GPIO01.IO08	40
LSIO.GPIO01.IO09	41
LSIO.GPIO01.IO10	42
LSIO.GPIO01.IO11	43
LSIO.GPIO01.IO12	44
LSIO.GPIO01.IO13	45
LSIO.GPIO01.IO14	46
LSIO.GPIO01.IO15	47
LSIO.GPIO01.IO16	48
LSIO.GPIO01.IO17	49
LSIO.GPIO01.IO18	50
LSIO.GPIO01.IO19	51
LSIO.GPIO01.IO20	52
LSIO.GPIO01.IO21	53
LSIO.GPIO01.IO22	54
LSIO.GPIO01.IO23	55
LSIO.GPIO01.IO24	56
LSIO.GPIO01.IO25	57
LSIO.GPIO01.IO26	58
LSIO.GPIO01.IO27	59
LSIO.GPIO01.IO28	60
LSIO.GPIO01.IO29	61
LSIO.GPIO01.IO30	62
LSIO.GPIO01.IO31	63
LSIO.GPIO02.IO00	64
LSIO.GPIO02.IO01	65
LSIO.GPIO02.IO02	66
LSIO.GPIO02.IO03	67
LSIO.GPIO02.IO04	68
LSIO.GPIO02.IO05	69
LSIO.GPIO02.IO06	70
LSIO.GPIO02.IO07	71
LSIO.GPIO02.IO08	72
LSIO.GPIO02.IO09	73
LSIO.GPIO02.IO10	74
LSIO.GPIO02.IO11	75
LSIO.GPIO02.IO12	76
LSIO.GPIO02.IO13	77
LSIO.GPIO02.IO14	78
LSIO.GPIO02.IO15	79
LSIO.GPIO02.IO16	80
LSIO.GPIO02.IO17	81
LSIO.GPIO02.IO18	82
LSIO.GPIO02.IO19	83
LSIO.GPIO02.IO20	84
LSIO.GPIO02.IO21	85
LSIO.GPIO02.IO22	86
LSIO.GPIO02.IO23	87
LSIO.GPIO02.IO24	88
LSIO.GPIO02.IO25	89
LSIO.GPIO02.IO26	90
LSIO.GPIO02.IO27	91
LSIO.GPIO02.IO28	92
LSIO.GPIO02.IO29	93
LSIO.GPIO02.IO30	94
LSIO.GPIO02.IO31	95
LSIO.GPIO03.IO00	96
LSIO.GPIO03.IO01	97
LSIO.GPIO03.IO02	98
LSIO.GPIO03.IO03	99
LSIO.GPIO03.IO04	100
LSIO.GPIO03.IO05	101
LSIO.GPIO03.IO06	102
LSIO.GPIO03.IO07	103
LSIO.GPIO03.IO08	104
LSIO.GPIO03.IO09	105
LSIO.GPIO03.IO10	106
LSIO.GPIO03.IO11	107
LSIO.GPIO03.IO12	108
LSIO.GPIO03.IO13	109
LSIO.GPIO03.IO14	110
LSIO.GPIO03.IO15	111
LSIO.GPIO03.IO16	112
LSIO.GPIO03.IO17	113
LSIO.GPIO03.IO18	114
LSIO.GPIO03.IO19	115
LSIO.GPIO03.IO20	116
LSIO.GPIO03.IO21	117
LSIO.GPIO03.IO22	118
LSIO.GPIO03.IO23	119
LSIO.GPIO03.IO24	120
LSIO.GPIO03.IO25	121
LSIO.GPIO03.IO26	122
LSIO.GPIO03.IO27	123
LSIO.GPIO03.IO28	124
LSIO.GPIO03.IO29	125
LSIO.GPIO03.IO30	126
LSIO.GPIO03.IO31	127
LSIO.GPIO04.IO00	128
LSIO.GPIO04.IO01	129
LSIO.GPIO04.IO02	130
LSIO.GPIO04.IO03	131
LSIO.GPIO04.IO04	132
LSIO.GPIO04.IO05	133
LSIO.GPIO04.IO06	134
LSIO.GPIO04.IO07	135
LSIO.GPIO04.IO08	136
LSIO.GPIO04.IO09	137
LSIO.GPIO04.IO10	138
LSIO.GPIO04.IO11	139
LSIO.GPIO04.IO12	140
LSIO.GPIO04.IO13	141
LSIO.GPIO04.IO14	142
LSIO.GPIO04.IO15	143
LSIO.GPIO04.IO16	144
LSIO.GPIO04.IO17	145
LSIO.GPIO04.IO18	146
LSIO.GPIO04.IO19	147
LSIO.GPIO04.IO20	148
LSIO.GPIO04.IO21	149
LSIO.GPIO04.IO22	150
LSIO.GPIO04.IO23	151
LSIO.GPIO04.IO24	152
LSIO.GPIO04.IO25	153
LSIO.GPIO04.IO26	154
LSIO.GPIO04.IO27	155
LSIO.GPIO04.IO28	156
LSIO.GPIO04.IO29	157
LSIO.GPIO04.IO30	158
LSIO.GPIO04.IO31	159
LSIO.GPIO05.IO00	160
LSIO.GPIO05.IO01	161
LSIO.GPIO05.IO02	162
LSIO.GPIO05.IO03	163
LSIO.GPIO05.IO04	164
LSIO.GPIO05.IO05	165
LSIO.GPIO05.IO06	166
LSIO.GPIO05.IO07	167
LSIO.GPIO05.IO08	168
LSIO.GPIO05.IO09	169
LSIO.GPIO05.IO10	170
LSIO.GPIO05.IO11	171
LSIO.GPIO05.IO12	172
LSIO.GPIO05.IO13	173
LSIO.GPIO05.IO14	174
LSIO.GPIO05.IO15	175
LSIO.GPIO05.IO16	176
LSIO.GPIO05.IO17	177
LSIO.GPIO05.IO18	178
LSIO.GPIO05.IO19	179
LSIO.GPIO05.IO20	180
LSIO.GPIO05.IO21	181
LSIO.GPIO05.IO22	182
LSIO.GPIO05.IO23	183
LSIO.GPIO05.IO24	184
LSIO.GPIO05.IO25	185
LSIO.GPIO05.IO26	186
LSIO.GPIO05.IO27	187
LSIO.GPIO05.IO28	188
LSIO.GPIO05.IO29	189
LSIO.GPIO05.IO30	190
LSIO.GPIO05.IO31	191
LSIO.GPIO06.IO00	192
LSIO.GPIO06.IO01	193
LSIO.GPIO06.IO02	194
LSIO.GPIO06.IO03	195
LSIO.GPIO06.IO04	196
LSIO.GPIO06.IO05	197
LSIO.GPIO06.IO06	198
LSIO.GPIO06.IO07	199
LSIO.GPIO06.IO08	200
LSIO.GPIO06.IO09	201
LSIO.GPIO06.IO10	202
LSIO.GPIO06.IO11	203
LSIO.GPIO06.IO12	204
LSIO.GPIO06.IO13	205
LSIO.GPIO06.IO14	206
LSIO.GPIO06.IO15	207
LSIO.GPIO06.IO16	208
LSIO.GPIO06.IO17	209
LSIO.GPIO06.IO18	210
LSIO.GPIO06.IO19	211
LSIO.GPIO06.IO20	212
LSIO.GPIO06.IO21	213
LSIO.GPIO06.IO22	214
LSIO.GPIO06.IO23	215
LSIO.GPIO06.IO24	216
LSIO.GPIO06.IO25	217
LSIO.GPIO06.IO26	218
LSIO.GPIO06.IO27	219
LSIO.GPIO06.IO28	220
LSIO.GPIO06.IO29	221
LSIO.GPIO06.IO30	222
LSIO.GPIO06.IO31	223

iMX6, iMX6ULL, iMX7, iMX8M Mini/Plus

The i.MX 6/6ULL/7/8M Mini/8M Plus modules have GPIO controllers which can control up to 32 GPIOs. The GPIO names are formed "GPIO<controller>_IO<gpio>" or "gpio<controller>.IO[<gpio>]" with controller in 1..7 and gpio in 00..31. E.g. a GPIO function could be named GPIO2_IO04 or gpio2.IO04, depending on the processor.

The numeric value is calculated as follows:

32 x (controller- 1) + gpio

E.g. GPIO1_IO00 becomes 0, GPIO2_IO04 becomes 36.

Note that not all GPIO controllers provide all 32 possible GPIOs, so the list has gaps.

You must find the correspondence between GPIO and the edge connector pin (X1) that you want to use in the CoM datasheet. A good place to start is the SoC Function List:

iMX6, iMX6ULL, iMX7, iMX8M Mini/Plus GPIO table

Gpio	Numeric Representation
GPIO1_IO00	0
GPIO1_IO01	1
GPIO1_IO02	2
GPIO1_IO03	3
GPIO1_IO04	4
GPIO1_IO05	5
GPIO1_IO06	6
GPIO1_IO07	7
GPIO1_IO08	8
GPIO1_IO09	9
GPIO1_IO10	10
GPIO1_IO11	11
GPIO1_IO12	12
GPIO1_IO13	13
GPIO1_IO14	14
GPIO1_IO15	15
GPIO1_IO16	16
GPIO1_IO17	17
GPIO1_IO18	18
GPIO1_IO19	19
GPIO1_IO20	20
GPIO1_IO21	21
GPIO1_IO22	22
GPIO1_IO23	23
GPIO1_IO24	24
GPIO1_IO25	25
GPIO1_IO26	26
GPIO1_IO27	27
GPIO1_IO28	28
GPIO1_IO29	29
GPIO1_IO30	30
GPIO1_IO31	31
GPIO2_IO00	32
GPIO2_IO01	33
GPIO2_IO02	34
GPIO2_IO03	35
GPIO2_IO04	36
GPIO2_IO05	37
GPIO2_IO06	38
GPIO2_IO07	39
GPIO2_IO08	40
GPIO2_IO09	41
GPIO2_IO10	42
GPIO2_IO11	43
GPIO2_IO12	44
GPIO2_IO13	45
GPIO2_IO14	46
GPIO2_IO15	47
GPIO2_IO16	48
GPIO2_IO17	49
GPIO2_IO18	50
GPIO2_IO19	51
GPIO2_IO20	52
GPIO2_IO21	53
GPIO2_IO22	54
GPIO2_IO23	55
GPIO2_IO24	56
GPIO2_IO25	57
GPIO2_IO26	58
GPIO2_IO27	59
GPIO2_IO28	60
GPIO2_IO29	61
GPIO2_IO30	62
GPIO2_IO31	63
GPIO3_IO00	64
GPIO3_IO01	65
GPIO3_IO02	66
GPIO3_IO03	67
GPIO3_IO04	68
GPIO3_IO05	69
GPIO3_IO06	70
GPIO3_IO07	71
GPIO3_IO08	72
GPIO3_IO09	73
GPIO3_IO10	74
GPIO3_IO11	75
GPIO3_IO12	76
GPIO3_IO13	77
GPIO3_IO14	78
GPIO3_IO15	79
GPIO3_IO16	80
GPIO3_IO17	81
GPIO3_IO18	82
GPIO3_IO19	83
GPIO3_IO20	84
GPIO3_IO21	85
GPIO3_IO22	86
GPIO3_IO23	87
GPIO3_IO24	88
GPIO3_IO25	89
GPIO3_IO26	90
GPIO3_IO27	91
GPIO3_IO28	92
GPIO3_IO29	93
GPIO3_IO30	94
GPIO3_IO31	95
GPIO4_IO05	101
GPIO4_IO06	102
GPIO4_IO07	103
GPIO4_IO08	104
GPIO4_IO09	105
GPIO4_IO10	106
GPIO4_IO11	107
GPIO4_IO12	108
GPIO4_IO13	109
GPIO4_IO14	110
GPIO4_IO15	111
GPIO4_IO16	112
GPIO4_IO17	113
GPIO4_IO18	114
GPIO4_IO19	115
GPIO4_IO20	116
GPIO4_IO21	117
GPIO4_IO22	118
GPIO4_IO23	119
GPIO4_IO24	120
GPIO4_IO25	121
GPIO4_IO26	122
GPIO4_IO27	123
GPIO4_IO28	124
GPIO4_IO29	125
GPIO4_IO30	126
GPIO4_IO31	127
GPIO5_IO00	128
GPIO5_IO02	130
GPIO5_IO04	132
GPIO5_IO05	133
GPIO5_IO06	134
GPIO5_IO07	135
GPIO5_IO08	136
GPIO5_IO09	137
GPIO5_IO10	138
GPIO5_IO11	139
GPIO5_IO12	140
GPIO5_IO13	141
GPIO5_IO14	142
GPIO5_IO15	143
GPIO5_IO16	144
GPIO5_IO17	145
GPIO5_IO18	146
GPIO5_IO19	147
GPIO5_IO20	148
GPIO5_IO21	149
GPIO5_IO22	150
GPIO5_IO23	151
GPIO5_IO24	152
GPIO5_IO25	153
GPIO5_IO26	154
GPIO5_IO27	155
GPIO5_IO28	156
GPIO5_IO29	157
GPIO5_IO30	158
GPIO5_IO31	159
GPIO6_IO00	160
GPIO6_IO01	161
GPIO6_IO02	162
GPIO6_IO03	163
GPIO6_IO04	164
GPIO6_IO05	165
GPIO6_IO06	166
GPIO6_IO07	167
GPIO6_IO08	168
GPIO6_IO09	169
GPIO6_IO10	170
GPIO6_IO11	171
GPIO6_IO14	174
GPIO6_IO15	175
GPIO6_IO16	176
GPIO6_IO17	177
GPIO6_IO18	178
GPIO6_IO19	179
GPIO6_IO20	180
GPIO6_IO21	181
GPIO6_IO22	182
GPIO6_IO23	183
GPIO6_IO24	184
GPIO6_IO25	185
GPIO6_IO26	186
GPIO6_IO27	187
GPIO6_IO28	188
GPIO6_IO29	189
GPIO6_IO30	190
GPIO6_IO31	191
GPIO7_IO00	192
GPIO7_IO01	193
GPIO7_IO02	194
GPIO7_IO03	195
GPIO7_IO04	196
GPIO7_IO05	197
GPIO7_IO06	198
GPIO7_IO07	199
GPIO7_IO08	200
GPIO7_IO09	201
GPIO7_IO10	202
GPIO7_IO11	203
GPIO7_IO12	204
GPIO7_IO13	205

Apalis TK1

The Tegra CPU defines GPIOs with an alphanumeric term, e.g. A1 or T5 (GPIO-Q.01).

The numeric value is calculated as follows:

8 x (Character - 'A') + Digit

So A0 becomes 0, A7 becomes 7, B0 becomes 8, ...

The Linux kernel defines macros in arch/arm/mach-tegra/gpio-names.h for each GPIO.

Apalis TK1 GPIO table

The following table lists all assignments of Tegra GPIO to their numeric representation.

Gpio	Numeric Representation
A0	0
A1	1
A2	2
A3	3
A4	4
A5	5
A6	6
A7	7
B0	8
B1	9
B2	10
B3	11
B4	12
B5	13
B6	14
B7	15
C0	16
C1	17
C2	18
C3	19
C4	20
C5	21
C6	22
C7	23
D0	24
D1	25
D2	26
D3	27
D4	28
D5	29
D6	30
D7	31
E0	32
E1	33
E2	34
E3	35
E4	36
E5	37
E6	38
E7	39
F0	40
F1	41
F2	42
F3	43
F4	44
F5	45
F6	46
F7	47
G0	48
G1	49
G2	50
G3	51
G4	52
G5	53
G6	54
G7	55
H0	56
H1	57
H2	58
H3	59
H4	60
H5	61
H6	62
H7	63
I0	64
I1	65
I2	66
I3	67
I4	68
I5	69
I6	70
I7	71
J0	72
J1	73
J2	74
J3	75
J4	76
J5	77
J6	78
J7	79
K0	80
K1	81
K2	82
K3	83
K4	84
K5	85
K6	86
K7	87
L0	88
L1	89
L2	90
L3	91
L4	92
L5	93
L6	94
L7	95
M0	96
M1	97
M2	98
M3	99
M4	100
M5	101
M6	102
M7	103
N0	104
N1	105
N2	106
N3	107
N4	108
N5	109
N6	110
N7	111
O0	112
O1	113
O2	114
O3	115
O4	116
O5	117
O6	118
O7	119
P0	120
P1	121
P2	122
P3	123
P4	124
P5	125
P6	126
P7	127
Q0	128
Q1	129
Q2	130
Q3	131
Q4	132
Q5	133
Q6	134
Q7	135
R0	136
R1	137
R2	138
R3	139
R4	140
R5	141
R6	142
R7	143
S0	144
S1	145
S2	146
S3	147
S4	148
S5	149
S6	150
S7	151
T0	152
T1	153
T2	154
T3	155
T4	156
T5	157
T6	158
T7	159
U0	160
U1	161
U2	162
U3	163
U4	164
U5	165
U6	166
U7	167
V0	168
V1	169
V2	170
V3	171
V4	172
V5	173
V6	174
V7	175
W0	176
W1	177
W2	178
W3	179
W4	180
W5	181
W6	182
W7	183
X0	184
X1	185
X2	186
X3	187
X4	188
X5	189
X6	190
X7	191
Y0	192
Y1	193
Y2	194
Y3	195
Y4	196
Y5	197
Y6	198
Y7	199
Z0	200
Z1	201
Z2	202
Z3	203
Z4	204
Z5	205
Z6	206
Z7	207
AA0	208
AA1	209
AA2	210
AA3	211
AA4	212
AA5	213
AA6	214
AA7	215
BB0	216
BB1	217
BB2	218
BB3	219
BB4	220
BB5	221

Additionaly on T30

Gpio	Numeric Representation
BB6	222
BB7	223
CC0	224
CC1	225
CC2	226
CC3	227
CC4	228
CC5	229
CC6	230
CC7	231
DD0	232
DD1	233
DD2	234
DD3	235
DD4	236
DD5	237
DD6	238
DD7	239
EE0	240
EE1	241
EE2	242
EE3	243

Additionaly on TK1

Gpio	Numeric Representation
EE4	244
EE5	245
EE6	246
EE7	247
FF0	248
FF1	249
FF2	250

Gpio	Numeric Representation
A0	0
A1	1
A2	2
A3	3
A4	4
A5	5
A6	6
A7	7
B0	8
B1	9
B2	10
B3	11
B4	12
B5	13
B6	14
B7	15
C0	16
C1	17
C2	18
C3	19
C4	20
C5	21
C6	22
C7	23
D0	24
D1	25
D2	26
D3	27
D4	28
D5	29
D6	30
D7	31
E0	32
E1	33
E2	34
E3	35
E4	36
E5	37
E6	38
E7	39
F0	40
F1	41
F2	42
F3	43
F4	44
F5	45
F6	46
F7	47
G0	48
G1	49
G2	50
G3	51
G4	52
G5	53
G6	54
G7	55
H0	56
H1	57
H2	58
H3	59
H4	60
H5	61
H6	62
H7	63
I0	64
I1	65
I2	66
I3	67
I4	68
I5	69
I6	70
I7	71
J0	72
J1	73
J2	74
J3	75
J4	76
J5	77
J6	78
J7	79
K0	80
K1	81
K2	82
K3	83
K4	84
K5	85
K6	86
K7	87
L0	88
L1	89
L2	90
L3	91
L4	92
L5	93
L6	94
L7	95
M0	96
M1	97
M2	98
M3	99
M4	100
M5	101
M6	102
M7	103
N0	104
N1	105
N2	106
N3	107
N4	108
N5	109
N6	110
N7	111
O0	112
O1	113
O2	114
O3	115
O4	116
O5	117
O6	118
O7	119
P0	120
P1	121
P2	122
P3	123
P4	124
P5	125
P6	126
P7	127
Q0	128
Q1	129
Q2	130
Q3	131
Q4	132
Q5	133
Q6	134
Q7	135
R0	136
R1	137
R2	138
R3	139
R4	140
R5	141
R6	142
R7	143
S0	144
S1	145
S2	146
S3	147
S4	148
S5	149
S6	150
S7	151
T0	152
T1	153
T2	154
T3	155
T4	156
T5	157
T6	158
T7	159
U0	160
U1	161
U2	162
U3	163
U4	164
U5	165
U6	166
U7	167
V0	168
V1	169
V2	170
V3	171
V4	172
V5	173
V6	174
V7	175
W0	176
W1	177
W2	178
W3	179
W4	180
W5	181
W6	182
W7	183
X0	184
X1	185
X2	186
X3	187
X4	188
X5	189
X6	190
X7	191
Y0	192
Y1	193
Y2	194
Y3	195
Y4	196
Y5	197
Y6	198
Y7	199
Z0	200
Z1	201
Z2	202
Z3	203
Z4	204
Z5	205
Z6	206
Z7	207
AA0	208
AA1	209
AA2	210
AA3	211
AA4	212
AA5	213
AA6	214
AA7	215
BB0	216
BB1	217
BB2	218
BB3	219
BB4	220
BB5	221

Gpio	Numeric Representation
BB6	222
BB7	223
CC0	224
CC1	225
CC2	226
CC3	227
CC4	228
CC5	229
CC6	230
CC7	231
DD0	232
DD1	233
DD2	234
DD3	235
DD4	236
DD5	237
DD6	238
DD7	239
EE0	240
EE1	241
EE2	242
EE3	243

Gpio	Numeric Representation
A0	0
A1	1
A2	2
A3	3
A4	4
A5	5
A6	6
A7	7
B0	8
B1	9
B2	10
B3	11
B4	12
B5	13
B6	14
B7	15
C0	16
C1	17
C2	18
C3	19
C4	20
C5	21
C6	22
C7	23
D0	24
D1	25
D2	26
D3	27
D4	28
D5	29
D6	30
D7	31
E0	32
E1	33
E2	34
E3	35
E4	36
E5	37
E6	38
E7	39
F0	40
F1	41
F2	42
F3	43
F4	44
F5	45
F6	46
F7	47
G0	48
G1	49
G2	50
G3	51
G4	52
G5	53
G6	54
G7	55
H0	56
H1	57
H2	58
H3	59
H4	60
H5	61
H6	62
H7	63
I0	64
I1	65
I2	66
I3	67
I4	68
I5	69
I6	70
I7	71
J0	72
J1	73
J2	74
J3	75
J4	76
J5	77
J6	78
J7	79
K0	80
K1	81
K2	82
K3	83
K4	84
K5	85
K6	86
K7	87
L0	88
L1	89
L2	90
L3	91
L4	92
L5	93
L6	94
L7	95
M0	96
M1	97
M2	98
M3	99
M4	100
M5	101
M6	102
M7	103
N0	104
N1	105
N2	106
N3	107
N4	108
N5	109
N6	110
N7	111
O0	112
O1	113
O2	114
O3	115
O4	116
O5	117
O6	118
O7	119
P0	120
P1	121
P2	122
P3	123
P4	124
P5	125
P6	126
P7	127
Q0	128
Q1	129
Q2	130
Q3	131
Q4	132
Q5	133
Q6	134
Q7	135
R0	136
R1	137
R2	138
R3	139
R4	140
R5	141
R6	142
R7	143
S0	144
S1	145
S2	146
S3	147
S4	148
S5	149
S6	150
S7	151
T0	152
T1	153
T2	154
T3	155
T4	156
T5	157
T6	158
T7	159
U0	160
U1	161
U2	162
U3	163
U4	164
U5	165
U6	166
U7	167
V0	168
V1	169
V2	170
V3	171
V4	172
V5	173
V6	174
V7	175
W0	176
W1	177
W2	178
W3	179
W4	180
W5	181
W6	182
W7	183
X0	184
X1	185
X2	186
X3	187
X4	188
X5	189
X6	190
X7	191
Y0	192
Y1	193
Y2	194
Y3	195
Y4	196
Y5	197
Y6	198
Y7	199
Z0	200
Z1	201
Z2	202
Z3	203
Z4	204
Z5	205
Z6	206
Z7	207
AA0	208
AA1	209
AA2	210
AA3	211
AA4	212
AA5	213
AA6	214
AA7	215
BB0	216
BB1	217
BB2	218
BB3	219
BB4	220
BB5	221

Gpio	Numeric Representation
BB6	222
BB7	223
CC0	224
CC1	225
CC2	226
CC3	227
CC4	228
CC5	229
CC6	230
CC7	231
DD0	232
DD1	233
DD2	234
DD3	235
DD4	236
DD5	237
DD6	238
DD7	239
EE0	240
EE1	241
EE2	242
EE3	243

GPIO Alphanumeric to GPIO Numeric Assignment

GPIO​

Apalis iMX8​

Colibri iMX8X​

iMX6, iMX6ULL, iMX7, iMX8M Mini/Plus​

Apalis TK1​

GPIO

Apalis iMX8

Colibri iMX8X

iMX6, iMX6ULL, iMX7, iMX8M Mini/Plus

Apalis TK1

Gpio	Numeric Representation
A0	0
A1	1
A2	2
A3	3
A4	4
A5	5
A6	6
A7	7
B0	8
B1	9
B2	10
B3	11
B4	12
B5	13
B6	14
B7	15
C0	16
C1	17
C2	18
C3	19
C4	20
C5	21
C6	22
C7	23
D0	24
D1	25
D2	26
D3	27
D4	28
D5	29
D6	30
D7	31
E0	32
E1	33
E2	34
E3	35
E4	36
E5	37
E6	38
E7	39
F0	40
F1	41
F2	42
F3	43
F4	44
F5	45
F6	46
F7	47
G0	48
G1	49
G2	50
G3	51
G4	52
G5	53
G6	54
G7	55
H0	56
H1	57
H2	58
H3	59
H4	60
H5	61
H6	62
H7	63
I0	64
I1	65
I2	66
I3	67
I4	68
I5	69
I6	70
I7	71
J0	72
J1	73
J2	74
J3	75
J4	76
J5	77
J6	78
J7	79
K0	80
K1	81
K2	82
K3	83
K4	84
K5	85
K6	86
K7	87
L0	88
L1	89
L2	90
L3	91
L4	92
L5	93
L6	94
L7	95
M0	96
M1	97
M2	98
M3	99
M4	100
M5	101
M6	102
M7	103
N0	104
N1	105
N2	106
N3	107
N4	108
N5	109
N6	110
N7	111
O0	112
O1	113
O2	114
O3	115
O4	116
O5	117
O6	118
O7	119
P0	120
P1	121
P2	122
P3	123
P4	124
P5	125
P6	126
P7	127
Q0	128
Q1	129
Q2	130
Q3	131
Q4	132
Q5	133
Q6	134
Q7	135
R0	136
R1	137
R2	138
R3	139
R4	140
R5	141
R6	142
R7	143
S0	144
S1	145
S2	146
S3	147
S4	148
S5	149
S6	150
S7	151
T0	152
T1	153
T2	154
T3	155
T4	156
T5	157
T6	158
T7	159
U0	160
U1	161
U2	162
U3	163
U4	164
U5	165
U6	166
U7	167
V0	168
V1	169
V2	170
V3	171
V4	172
V5	173
V6	174
V7	175
W0	176
W1	177
W2	178
W3	179
W4	180
W5	181
W6	182
W7	183
X0	184
X1	185
X2	186
X3	187
X4	188
X5	189
X6	190
X7	191
Y0	192
Y1	193
Y2	194
Y3	195
Y4	196
Y5	197
Y6	198
Y7	199
Z0	200
Z1	201
Z2	202
Z3	203
Z4	204
Z5	205
Z6	206
Z7	207
AA0	208
AA1	209
AA2	210
AA3	211
AA4	212
AA5	213
AA6	214
AA7	215
BB0	216
BB1	217
BB2	218
BB3	219
BB4	220
BB5	221

Gpio	Numeric Representation
BB6	222
BB7	223
CC0	224
CC1	225
CC2	226
CC3	227
CC4	228
CC5	229
CC6	230
CC7	231
DD0	232
DD1	233
DD2	234
DD3	235
DD4	236
DD5	237
DD6	238
DD7	239
EE0	240
EE1	241
EE2	242
EE3	243