# UIC320A — High-Speed USB to UART (TTL) Adapter The UIC320A is a reliable USB-to-UART (TTL) adapter that bridges a computer's USB port with devices using TTL serial communication. In addition to serving as a standard USB-to-UART adapter, it can be used to configure the UIM344 serial closed-loop motor, or as a programmer for Arduino boards — particularly those without a built-in USB-to-serial converter (e.g., Arduino Pro Mini, Arduino Nano). Powered by the Silicon Labs CP2102N chipset — renowned for its robustness and compatibility — it offers seamless support for major operating systems, including Windows, Linux, macOS, Arduino, and Android. Engineered for industrial environments, the UIC320A operates reliably even in electrically noisy conditions. Its durable cast-metal enclosure provides mechanical protection, while the adapter draws power directly from the USB port, eliminating the need for an external power supply. --- ## Features :::grid{cols=2 style=card} **High-Speed UART** - Baud rates: 300 bps to 3 Mbps - 5V and 3.3V TTL support - Data bits: 5, 6, 7, 8 - Stop bits: 1, 1.5, 2 - Parity: None, Odd, Even, Mark, Space **Industrial Design** - Cast metal alloy enclosure - USB 2.0 full-speed (12 Mbps) - USB-powered, no external power needed - Flip-clip connector for easy wiring ::: :::grid{cols=2 style=card} **Broad Compatibility** - Windows (32/64-bit) - Linux (kernel 3.0.0-19+) - macOS 8+, Android - Arduino IDE support **ESD Protection** - TX/RX: ±8 kV - IEC 61000-4-2 Level 4: 30 kV - MIL-STD-883 3015.7: 30 kV ::: --- ## Applications - **USB to UART (TTL) Adapter** — Connect computers to TTL serial devices - **UIM344 Configuration Tool** — Configure UIM344 serial closed-loop motors via CFG344 software - **Arduino Programmer** — Program Arduino boards without built-in USB (Pro Mini, Nano, etc.) --- ## Specifications ### General Information | Parameter | Specification | |-----------|---------------| | Part Number | UIC320A | | Operating System | Windows (32/64-bit), Linux (kernel 3.0.0-19+), macOS 8+, Android | | USB Connector | Type A, Cast Aluminum Alloy | | USB Compliance | USB 1.1 / 2.0 | | Power | From USB port (no external power required) | ### UART Interface | Parameter | Specification | |-----------|---------------| | Connector | Flip-clip connector, 4-pin | | Signals | DTR, TX, RX, GND | | Baud Rates | 300, 600, 1200, 1800, 2400, 4000, 4800, 7200, 9600, 14400, 16000, 19200, 28800, 38400, 51200, 56000, 57600, 64000, 76800, 115200, 128000, 153600, 230400, 250000, 256000, 460800, 500000, 576000, 921600, 1M, 1.2M, 1.5M, 2M, 3M bps | | Data Bits | 5, 6, 7, 8 | | Stop Bits | 1, 1.5, 2 | | Parity | None, Odd, Even, Mark, Space | ### ESD Protection | Parameter | Specification | |-----------|---------------| | TX / RX Pins | ±8 kV | | IEC 61000-4-2 (Direct discharge) | 30 kV (Level 4) | | IEC 61000-4-2 (Air discharge) | 30 kV (Level 4) | | MIL-STD-883, Method 3015.7 | 30 kV | ### Mechanical & Environmental | Parameter | Specification | |-----------|---------------| | Enclosure | Aluminum | | Cable Length | 1 ft (30 cm) | | Weight | 25 g | | Operating Temperature | -40°C to +85°C | | Operating Humidity | 5% to 85% RH | | Warranty | 1-year limited warranty | --- ## Wiring ### Wire Color Code | Color | Signal | Description | |-------|--------|-------------| | Yellow | DTR | DTR signal to device | | White | TX | Transmit data to device | | Green | RX | Receive data from device | | Black | GND | Signal ground | ### Connection Diagram  > **Note**: The UIC320A supports both 5V and 3.3V TTL logic levels. Ensure your device's logic level matches the adapter's output. --- ## Quick Start 1. Connect the UIC320A to your computer via USB 2. Install the CP2102N driver (if not automatically recognized) 3. Connect the UART wires to your device (TX → RX, RX → TX, GND → GND) 4. Open a serial terminal (e.g., PuTTY, Arduino Serial Monitor) 5. Select the correct COM port and baud rate 6. Communication is ready ### UIM344 Configuration ```bash # Connect UIC320A to UIM344 motor, then open CFG344 tool # Select the COM port assigned to UIC320A # Configure motor parameters via CFG344 GUI ``` ### Arduino Programming ```cpp // 1. Connect UIC320A to Arduino board (TX→RX, RX→TX, GND→GND) // 2. In Arduino IDE: Tools → Board → Select your board // 3. Tools → Port → Select UIC320A COM port // 4. Upload sketch ``` --- ## Safety Precautions ### Electrical Safety | Hazard | Precaution | |--------|------------| | ESD | Use anti-static precautions when handling. Discharge static before touching connectors. | | Power Supply | The device is USB-powered. Ensure the USB port can supply sufficient current. | | Voltage Level | Verify the target device's logic voltage (3.3V or 5V) before connecting. | ### Operational Safety | Hazard | Precaution | |--------|------------| | Operating Temperature | Use within -40°C to +85°C range. | | Humidity | Keep within 5% to 85% RH. Do not use in condensing environments. | | Cable Strain | Avoid sharp bends or pulling on the USB cable. | --- ## Downloads - 📖 [UIC320A Datasheet V5.10 (PDF)](https://www.uirobot.com/uploads/files/Manual_UIC320A%20V5.10.pdf) - 💻 [CP2102N USB Driver](https://www.silabs.com/developers/usb-to-uart-bridge-vcp-drivers) --- ## Related Documents - [UIM344 Pulse & Direction Stepper Motor Controller](/docs/uim344) - [Quick Start Guide](/docs/quick-start) - [Arduino CAN Bus Examples](/docs/arduino-examples) --- *Last updated: 2026-06-25 | Based on Datasheet V5.10*