> For the complete documentation index, see [llms.txt](https://dev.solid-run.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.solid-run.com/nxp/imx6/sbc-platform/imx6-other-articles/imx6-som-available-i-os.md).

# i.MX6 SOM available I/Os

#### Available I/Os

The below table describes the available input/output of the i.MX6 SOM. Specific functions are detailed on the 1st column.

{% hint style="warning" %}
**Please note** GPIOs marked in green take part in the booting process, please take special care on their state during reset.
{% endhint %}

|               |              |               |                                                                   |                     |                                                            |
| ------------- | ------------ | ------------- | ----------------------------------------------------------------- | ------------------- | ---------------------------------------------------------- |
| **Interface** | **Signals**  | **GPIO**      | <p><strong>Connector Pin</strong><br><strong>HB2/SOM</strong></p> | **HB2**             | **COMMENTS**                                               |
|               |              |               |                                                                   |                     |                                                            |
| UART1         | TX           | (GPIO5\_IO28) | J7-52 (J8004)                                                     | Terminal (Buffered) | J-25                                                       |
|               | RX           | (GPIO5\_IO29) | J7-54 (J8004)                                                     | Terminal (Buffered) | J-25                                                       |
|               | CTS          | (GPIO3\_IO20) | J5001-23                                                          | NC                  |                                                            |
|               | RTS          | (GPIO3\_IO19) | J5001-11                                                          | NC                  |                                                            |
|               |              |               |                                                                   |                     |                                                            |
| UART2         | TX           | (GPIO2\_IO15) | J5001-46                                                          | RS485-TX            | J-35                                                       |
|               | RX           | (GPIO2\_IO12) | J5001-44                                                          | RS485-RX            | J-35                                                       |
|               | CTS          | (GPIO2\_IO14) | J5001-48                                                          | RS485-DE            |                                                            |
|               | RTS          | (GPIO2\_IO13) | J5001-50                                                          | V\_USB3 PWR\_EN     |                                                            |
|               |              |               |                                                                   |                     |                                                            |
| UART3         | TX           | (GPIO3\_IO24) | J5001-29                                                          | MIKROBUS            | U10002                                                     |
|               | RX           | (GPIO3\_IO25) | J5001-31                                                          | MIKROBUS            | U10002                                                     |
|               | CTS          | (GPIO3\_IO24) | J5001-40                                                          | NU                  | J-23 (DISP1\_DATA21)                                       |
|               | RTS          | (GPIO3\_IO31) | J5001-58                                                          | NU                  | J-23 (DISP1\_DATA20)                                       |
|               |              |               |                                                                   |                     |                                                            |
| UART4         | TX           | (GPIO4\_IO06) | J7-51 (J8004)                                                     | AUDIO CODEC         | UART4 is used on the SOM on different pins                 |
|               | RX           | (GPIO4\_IO07) | J7-53 (J8004)                                                     | AUDIO CODEC         | UART4 is used on the SOM on different pins                 |
|               |              |               |                                                                   |                     |                                                            |
| UART5         | TX           | (GPIO4\_IO08) | J7-73 (J8004)                                                     | AUDIO CODEC         |                                                            |
|               | RX           | (GPIO4\_IO09) | J7-55 (J8004)                                                     | SD2\_VSELECT        | Select betweent 3.3V and 1.8V                              |
|               |              |               |                                                                   |                     |                                                            |
|               |              |               |                                                                   |                     |                                                            |
| CAN           | TX           | GPIO4\_IO10   | J5001-12                                                          | CAN                 | J-28. Whne the HDMI is assembled there is no CAN interface |
|               | RX           | GPIO4\_IO11   | J7-23 (J8004)                                                     | HDMI/CAN            | J-28. Whne the HDMI is assembled there is no CAN interface |
|               |              |               |                                                                   |                     |                                                            |
|               |              |               |                                                                   |                     |                                                            |
| SPI           | ECSPI2\_MISO | GPIO2\_IO25   | J9-45 (J5002)                                                     | MIKROBUS            | U10002                                                     |
|               | ECSPI2\_MOSI | GPIO2\_IO24   | J9-47 (J5002)                                                     | MIKROBUS            | U10002                                                     |
|               | ECSPI2\_SCLK | GPIO2\_IO23   | J9-49 (J5002)                                                     | MIKROBUS            | U10002                                                     |
|               | ECSPI2\_SS0  | GPIO2\_IO26   | J9-32 (J5002)                                                     | MIKROBUS            | U10002                                                     |
|               | ECSPI2\_SS1  | GPIO2\_IO27   | J9-34 (J5002)                                                     | MIKROBUS            | U10002                                                     |
|               |              |               |                                                                   |                     |                                                            |
| I2C1          | SCL          | GPIO3\_IO21   | J9-51 (J5002)                                                     | MPCIe/AUDIO         |                                                            |
|               | SDA          | GPIO3\_IO28   | J9-53 (J5002)                                                     | MPCIe/AUDIO         |                                                            |
|               |              |               |                                                                   |                     |                                                            |
| I2C3          | SCL          | GPIO3\_IO17   | J9-33 (J5002)                                                     | MIKROBUS            | U10002                                                     |
|               | SDA          | GPIO3\_IO18   | J9-31 (J5002)                                                     | MIKROBUS            | U10002                                                     |
|               |              |               |                                                                   |                     |                                                            |
| SPDIF         | IN           | GPIO1\_IO24   | J5001-35                                                          | NU                  | J-24                                                       |
|               | OUT          | GPIO7\_IO17   | J7-50 (J8004)                                                     | NU                  | J-24                                                       |
|               |              |               |                                                                   |                     |                                                            |
| HDMI          | HDMI\_CEC    | GPIO5\_IO02   | J5001-17                                                          | NC                  |                                                            |
|               |              |               |                                                                   |                     |                                                            |
|               |              |               |                                                                   |                     |                                                            |
| IO            |              | GPIO1\_IO00   | J9-24 (J5002)                                                     | USB\_H1\_PWR\_EN    |                                                            |
|               |              | GPIO1\_IO01   | J7-56 (J8004)                                                     | USB\_OTG\_ID        |                                                            |
|               |              | GPIO1\_IO03   | J7-69 (J8004)                                                     | CAP\_TOUCH\_INT     | J-6                                                        |
|               |              | GPIO1\_IO07   | J5001-14                                                          | NC                  |                                                            |
|               |              | GPIO1\_IO09   | J5001-42                                                          | MIKROBUS            | U10002                                                     |
|               |              | GPIO1\_IO15   | J7-59 (J8004)                                                     | AUDIO CLK           |                                                            |
|               |              | GPIO1\_IO25   | J9-59 (J5002)                                                     | NC                  |                                                            |
|               |              |               |                                                                   |                     |                                                            |
|               |              | GPIO2\_IO08   | J5001-36                                                          | msata\_DISABLE      | U2027                                                      |
|               |              | GPIO2\_IO09   | J9-55 (J5002)                                                     | DISP0\_CONTRAST     | J-6                                                        |
|               |              | GPIO2\_IO10   | J9-57 (J5002)                                                     | DSI Connectors      | J-8                                                        |
|               |              | GPIO2\_IO11   | J5001-38                                                          | MPCIe RST#          | J-5                                                        |
|               |              | GPIO2\_IO16   | J5001-69                                                          | NU                  | J-23 (DISP1\_DATA17)                                       |
|               |              | GPIO2\_IO17   | J5001-66                                                          | NU                  | J-23 (DISP1\_DATA16)                                       |
|               |              | GPIO2\_IO18   | J5001-62                                                          | NU                  | J-24 (DISP1\_DATA15)                                       |
|               |              | GPIO2\_IO19   | J5001-63                                                          | NU                  | J-24 (DISP1\_DATA14)                                       |
|               |              | GPIO2\_IO20   | J5001-64                                                          | NU                  | J-23 (DISP1\_DATA13)                                       |
|               |              | GPIO2\_IO21   | J5001-59                                                          | NU                  | J-23 (DISP1\_DATA12)                                       |
|               |              | GPIO2\_IO22   | J5001-54                                                          | NU                  | J-23 (DI1\_DISP\_CLK)                                      |
|               |              | GPIO2\_IO28   | J5001-68                                                          | NU                  | J-24 (DISP1\_DATA11)                                       |
|               |              | GPIO2\_IO29   | J5001-57                                                          | NU                  |                                                            |
|               |              | GPIO2\_IO30   | J5001-37                                                          | NC                  | (EIM\_EB2)                                                 |
|               |              | GPIO2\_IO31   | J5001-39                                                          | NC                  | (EIM\_EB3)                                                 |
|               |              |               |                                                                   |                     |                                                            |
|               |              | GPIO3\_IO00   | J5001-60                                                          | NU                  | J-23 (DISP1\_DATA09)                                       |
|               |              | GPIO3\_IO01   | J5001-55                                                          | NU                  | J-23 (DISP1\_DATA08)                                       |
|               |              | GPIO3\_IO02   | J5001-70                                                          | NU                  | J-22 (DISP1\_DATA07)                                       |
|               |              | GPIO3\_IO03   | J9-58 (J5002)                                                     | NU                  | J-22 (DISP1\_DATA06)                                       |
|               |              | GPIO3\_IO04   | J9-62 (J5002)                                                     | NU                  | J-21 (DISP1\_DATA05)                                       |
|               |              | GPIO3\_IO05   | J9-64 (J5002)                                                     | BOOT                | J-5005 (DISP1\_DATA04)                                     |
|               |              | GPIO3\_IO06   | J9-54 (J5002)                                                     | BOOT                | J-5005 (DISP1\_DATA03)                                     |
|               |              | GPIO3\_IO07   | J9-56 (J5002)                                                     | NU                  | J-22 (DISP1\_DATA02)                                       |
|               |              | GPIO3\_IO08   | J9-60 (J5002)                                                     | NU                  | J-21 (DISP1\_DATA01)                                       |
|               |              | GPIO3\_IO09   | J9-66 (J5002)                                                     | NU                  | J-21 (DISP1\_DATA00)                                       |
|               |              | GPIO3\_IO10   | J5001-43                                                          | NU                  | J-22 (DI1\_PIN15)                                          |
|               |              | GPIO3\_IO11   | J5001-41                                                          | BOOT                | J-5005 (DI1\_PIN02)                                        |
|               |              | GPIO3\_IO12   | J5001-51                                                          | BOOT                | J-5005 (DI1\_PIN03)                                        |
|               |              | GPIO3\_IO13   | J5001-45                                                          | NU                  | J-23 (DI1\_D0\_CS)                                         |
|               |              | GPIO3\_IO14   | J5001-49                                                          | NU                  | J-23 (DI1\_D1\_CS)                                         |
|               |              | GPIO3\_IO15   | J5001-53                                                          | NU                  | J-24 (DI1\_PIN01)                                          |
|               |              | GPIO3\_IO16   | J5001-19                                                          | NC                  |                                                            |
|               |              | GPIO3\_IO23   | J5001-25                                                          | NC                  |                                                            |
|               |              | GPIO3\_IO26   | J5001-61                                                          | NU                  | J-24 (DISP1\_DATA22)                                       |
|               |              | GPIO3\_IO27   | J5001-65                                                          | NU                  | J-24 (DISP1\_DATA23)                                       |
|               |              | GPIO3\_IO29   | J5001-27                                                          | NC                  |                                                            |
|               |              |               |                                                                   |                     |                                                            |
|               |              | GPIO4\_IO14   | J7-67 (J8004)                                                     | DSI Connector       | J-6                                                        |
|               |              | GPIO4\_IO29   | J9-68 (J5002)                                                     | MIKROBUS            | U10002                                                     |
|               |              | GPIO4\_IO30   | J9-41 (J5002)                                                     | uSD Power Cycle     |                                                            |
|               |              |               |                                                                   |                     |                                                            |
|               |              | GPIO5\_IO00   | J5001-1                                                           | NC                  | (EIM\_WAIT)                                                |
|               |              | GPIO5\_IO04   | J5001-67                                                          | NU                  | J-24 (DISP1\_DATA19)                                       |
|               |              | GPIO5\_IO13   | J7-57 (J8004)                                                     | AUD5\_RXD           |                                                            |
|               |              |               |                                                                   |                     |                                                            |
|               |              | GPIO6\_IO06   | J5001-56                                                          | NU                  | J-24 (DISP1\_DATA18)                                       |
|               |              | GPIO6\_IO15   | J7-63 (J8004)                                                     | DSI Connector       | J-8                                                        |
|               |              |               |                                                                   |                     |                                                            |
|               |              | GPIO7\_IO09   | J5001-34                                                          | IR\_RECEIVE         |                                                            |
|               |              | GPIO7\_IO10   | J5001-32                                                          | USB4\_PWR\_EN       |                                                            |
|               |              | GPIO7\_IO13   | J5001-28                                                          | A/D INT             |                                                            |


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://dev.solid-run.com/nxp/imx6/sbc-platform/imx6-other-articles/imx6-som-available-i-os.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.