FTDI TTL-232R-3V3 USB-UART 케이블 사용 설명서

1. 서론

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. 안전 정보

• 적절한 볼륨 확인tage levels (+3.3V) are maintained to prevent damage to connected devices.
• 케이블을 극한 온도, 습기 또는 부식성 환경에 노출시키지 마십시오.
• 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. 패키지 내용

패키지에 모든 품목이 들어 있는지 확인하세요.

• 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. 제품 오버view

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.

그림 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 핀아웃 설명

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. 설정

5.1 드라이버 설치

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. 드라이버 다운로드: Visit the official FTDI web사이트 (www.ftdichip.com/Drivers/VCP.htm) to download the latest Virtual COM Port (VCP) drivers for your operating system.
2. 드라이버 설치: Follow the instructions provided with the downloaded driver package. This typically involves running an executable file or following on-screen prompts.
3. 케이블 연결: Plug the USB-A end of the TTL-223R-3V3 cable into an available USB port on your computer.
4. 설치 확인:
   • 윈도우: 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.
   • 맥 OS : Open Terminal and type ls /dev/tty.usbserial*. You should see an entry corresponding to the cable.
   • 리눅스: 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 우편번호 (Pin 4) to the target device's 수신 거부.
• Connect the cable's 수신 거부 (Pin 5) to the target device's 우편번호.
• Connect the cable's 접지 (Pin 1) to the target device's 접지.
• If hardware flow control is used, connect CTS (Pin 2) to target's 실시간 그리고 실시간 (Pin 6) to target's CTS.
• If powering the target device from the cable, connect the cable's (주)비씨씨 (Pin 3) to the target device's +5V input (ensure the target device can accept 5V and its current draw does not exceed 75mA).

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

6. 사용 설명서

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. COM 포트를 선택하십시오. In the terminal program settings, select the COM port number identified during driver installation (e.g., COM3, /dev/ttyUSB0).
3. 직렬 설정 구성:
   • 전송 속도: Set to match your target device's baud rate (e.g., 9600, 115200, up to 3MBaud).
   • 데이터 비트: 일반적으로 8
   • 패리티 : 없음
   • 중지 비트 : 일반적으로 1
   • 흐름 제어: None, or Hardware (RTS/CTS) if enabled on your target device.
4. 연결 설정: Open the serial connection in your terminal program. You should now be able to send and receive data from your target device.

7. 유지관리

• 청소: 부드럽고 마른 천으로 케이블과 커넥터를 닦으십시오. 액체 세척제나 용제를 사용하지 마십시오.
• 저장: Store the cable in a cool, dry place, away from direct sunlight and extreme temperatures. Avoid tangling the cable.
• 점검: 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. 문제 해결

8.1 일반적인 문제 및 해결 방법

• No COM Port Detected:
  • Ensure drivers are correctly installed (refer to Section 5.1).
  • 컴퓨터의 다른 USB 포트를 사용해 보십시오.
  • 컴퓨터를 다시 시작하세요.
  • Check the cable for physical damage.
• 데이터 전송/수신 없음:
  • 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.
• 간헐적인 연결:
  • 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. 사양

10. 보증 및 지원

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 Web대지: www.ftdichip.com
• 드라이버 지원: www.ftdichip.com/Drivers/VCP.htm