> ## Documentation Index
> Fetch the complete documentation index at: https://docs.deneyapkart.org/llms.txt
> Use this file to discover all available pages before exploring further.

# External Connections (DYM)

## USB Micro-B

| Pin No | Pin Name |   | Pin Function                      |
| ------ | -------- | - | --------------------------------- |
| 1      | VUSB     |   | Main power supply line            |
| 2      | D-       |   | Differential data line (negative) |
| 3      | D+       |   | Differential data line (positive) |
| 4      | ID       |   |                                   |
| 5      | GND      |   | Main ground line                  |

## I2C Communication Connector (JST-SH 1.0mm 4 pin)

| Pin No | Pin Name |   | Pin Function            |
| ------ | -------- | - | ----------------------- |
| 1      | GND      |   | Main ground line        |
| 2      | 3V3      |   | Regulator output (3.3V) |
| 3      | SDA      |   | Bidirectional data line |
| 4      | SCL      |   | Data line clock signal  |