FTDI TTL-232R-3V3 USB to UART Cable User Manual

1. Introduzione

This manual provides comprehensive instructions for the FTDI TTL-232R-3V3 USB to UART cable. This cable offers a simple and reliable solution for connecting devices with +3.3V TTL level UART signals to a computer via a USB port. It is designed for engineers, hobbyists, and developers working with embedded systems, microcontrollers, and other serial communication applications.

2. Informazioni di sicurezza

• Assicuratevi voltage levels (+3.3V) are maintained to prevent damage to connected devices.
• Ùn espone micca u cavu à temperature estreme, umidità o ambienti corrosivi.
• Avoid bending or twisting the cable excessively, as this may damage internal wires.
• Disconnect the cable from both the computer and the target device before performing any maintenance or modifications.

3. Cuntenutu di u pacchettu

Verificate chì tutti l'articuli sò presenti in u vostru pacchettu:

• 1 x FTDI TTL-232R-3V3 USB to UART Cable
• (Optional: Driver CD or link to driver download, if applicable. Refer to manufacturer's website for latest drivers.)

4. Produttu Finituview

The FTDI TTL-232R-3V3 is a USB to serial UART (Universal Asynchronous Receiver/Transmitter) converter cable. It provides a USB-A connector on one end and a 6-pin SIL (Single In-Line) connector with 0.1" pitch on the other, offering +3.3V TTL level signals. The cable integrates an FT232R IC, handling all USB signaling and protocols.

Figura 1: FTDI TTL-232R-3V3 USB to UART Cable. This image shows the black USB-A connector on one end and the 6-pin header on the other, with the cable coiled.

4.1 Pinout Description

The 6-pin SIL connector provides the following signals:

Note: The VCC pin (Pin 3) provides +5V from the USB port, which can be used to power external circuitry up to 75mA. The data signals (TXD, RXD, CTS, RTS) operate at +3.3V TTL levels.

5. Setup

5.1 Installazione di Driver

The FTDI TTL-232R-3V3 cable requires specific drivers to function correctly on your computer. These drivers are often automatically installed by modern operating systems (Windows 10/11, macOS, Linux) when the cable is first connected. If automatic installation fails, or for older operating systems, manual installation may be necessary.

1. Scaricate i Driver: Visit the official FTDI websitu (www.ftdichip.com/Drivers/VCP.htm) to download the latest Virtual COM Port (VCP) drivers for your operating system.
2. Installa i Drivers: Follow the instructions provided with the downloaded driver package. This typically involves running an executable file or following on-screen prompts.
3. Connect Cable: Plug the USB-A end of the TTL-223R-3V3 cable into an available USB port on your computer.
4. Verificate l'installazione:
   • Windows: Open Device Manager (search for "Device Manager" in the Start menu). Look under "Ports (COM & LPT)" for an entry like "USB Serial Port (COMx)", where 'x' is a number.
   • macOS: Open Terminal and type ls /dev/tty.usbserial*. You should see an entry corresponding to the cable.
   • Linux: Open Terminal and type ls /dev/ttyUSB*. You should see an entry corresponding to the cable.

5.2 Connecting to a Target Device

Connect the 6-pin SIL connector to your target device's UART interface. Ensure correct pin alignment:

• Connect the cable's TXD (Pin 4) to the target device's RXD.
• Connect the cable's RXD (Pin 5) to the target device's TXD.
• Connect the cable's GND (Pin 1) to the target device's GND.
• If hardware flow control is used, connect CTS (Pin 2) to target's RTS è RTS (Pin 6) to target's CTS.
• If powering the target device from the cable, connect the cable's VCC (Pin 3) to the target device's + 5 V input (ensure the target device can accept 5V and its current draw does not exceed 75mA).

Attenzione: Always double-check the pinout of your target device to avoid damage due to incorrect connections.

6. Operating Instructions

Once the drivers are installed and the cable is connected to your target device, you can use a serial terminal program to communicate.

1. Open Terminal Program: Use a serial terminal application such as PuTTY (Windows), CoolTerm (macOS/Windows), or Minicom/screen (Linux).
2. Selezziunate u portu COM: In the terminal program settings, select the COM port number identified during driver installation (e.g., COM3, /dev/ttyUSB0).
3. Cunfigurà i paràmetri seriali:
   • Rate Baud: Set to match your target device's baud rate (e.g., 9600, 115200, up to 3MBaud).
   • Bit di dati: Di solitu 8
   • Parità: Nimu
   • Stop Bits: Di solitu 1
   • Controlu di flussu: None, or Hardware (RTS/CTS) if enabled on your target device.
4. Stabbilisce a cunnessione: Open the serial connection in your terminal program. You should now be able to send and receive data from your target device.

7. Mantenimentu

• Pulizia: Use a soft, dry cloth to clean the cable and connectors. Do not use liquid cleaners or solvents.
• Conservazione: Store the cable in a cool, dry place, away from direct sunlight and extreme temperatures. Avoid tangling the cable.
• Ispezione: Periodically inspect the cable for any signs of damage, such as frayed wires, bent pins, or cracked insulation. Discontinue use if damage is found.

8. Risoluzione di prublemi

8.1 Problemi cumuni è Soluzioni

• No COM Port Detected:
  • Ensure drivers are correctly installed (refer to Section 5.1).
  • Pruvate un portu USB differente in u vostru urdinatore.
  • Restart u vostru urdinatore.
  • Check the cable for physical damage.
• Nisuna trasmissione/ricezione di dati:
  • Verify the pinout connections between the cable and your target device (TXD to RXD, RXD to TXD, GND to GND).
  • Confirm that the serial settings (baud rate, data bits, parity, stop bits, flow control) in your terminal program match those of your target device.
  • Ensure the target device is powered on and functioning correctly.
  • Check if the target device's UART is enabled and configured.
• Cunnessione intermittente:
  • Check for loose connections at both the USB and 6-pin ends.
  • Avoid electromagnetic interference from other devices.
  • Ensure the cable is not excessively bent or stressed.

9. Specificazioni

10. Garanzia è Support

For warranty information and technical support, please refer to the official FTDI website or contact your point of purchase. FTDI provides extensive documentation and support resources for their products.

• FTDI Websitu: www.ftdichip.com
• Supportu di i cunduttori: www.ftdichip.com/Drivers/VCP.htm