> For the complete documentation index, see [llms.txt](https://docs.gremsy.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.gremsy.com/gimbals-for-m300-m350/pixy-sm/getting-started/i-o-connection.md).

# I/O Connection

## GIMBAL CONNECTION

### **HDMI:** 

To output video from the camera.

**Connector type:** micro HDMI.

<figure><img src="/files/4zTJ6pVrjdzIXdRX6CQt" alt="" width="296"><figcaption></figcaption></figure>

### **CTRL:**&#x20;

CTRL is a serial protocol (UART) port which is used to interface with Sony A7R IV via USB C port.&#x20;

**Connector type:** JST SM10B-GHS-TB(LF) (SN).

<figure><img src="/files/Gm01oKoNyOuadzYNWLUd" alt="" width="296"><figcaption></figcaption></figure>

### **USB-C:**

To interface with computer or upgrade firmware.&#x20;

**Connector type:** USC type C.

<figure><img src="/files/LQSNoeryiBpZXsWK1OcH" alt="" width="296"><figcaption></figcaption></figure>

### **Device Switch**:&#x20;

To switch between the gimbal and SOM for firmware upgrading.&#x20;

**Connector type:** 2 level switch.

<figure><img src="/files/NPWtrFDd1lswqDW63QHu" alt="" width="296"><figcaption></figcaption></figure>

### **Micro SD card:**&#x20;

To insert the micro SD card for Geo data storage.

**Connector type:** Micro SD card.&#x20;

{% hint style="info" %}
Note: Recommend SD Card from 30GB, at least 50MB/s read/write speed
{% endhint %}

<figure><img src="/files/9gF6dgk9cjqlF3jMGqEm" alt="" width="296"><figcaption></figcaption></figure>

## GIMBAL BUTTONS

### **Boot:**&#x20;

To push the firmware during upgrading process.

<figure><img src="/files/rMmi7W5ApVfMlYmdTGDE" alt="" width="296"><figcaption></figcaption></figure>

### **Reset:**&#x20;

To reset the system in case needed.

<figure><img src="/files/geTpB4skjoYcMz0kWJXV" alt="" width="296"><figcaption></figcaption></figure>

## QUICK RELEASE CONNECTION

### CONNECT

**STEP 1:** The marks on the top part and bottom part must be aligned.&#x20;

**STEP 2:** Keep everything aligned and attach the bottom part to the top part.&#x20;

**STEP 3:** Rotate the bottom counter-clockwise until the mark on the ring aligned with the locked icon.

<figure><img src="/files/1y7fHahjToDUFzb9AJYv" alt=""><figcaption></figcaption></figure>

### DISCONNECTION

**STEP 1:** Press & hold the release button.

**STEP 2:** Rotate the bottom clockwise.

**STEP 3:** When the mark on the top aligned with the unlock icon on the bottom, the PIXY SM can be detached from the top part of the Quick Release.

<figure><img src="/files/b2gIbDyHIZkyK3cYRzGN" alt=""><figcaption></figcaption></figure>


---

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