FT232RQ-REEL Detailed explanation of pin function specifications and circuit principle instructions
The FT232RQ is a USB to serial UART interface chip from FTDI (Future Technology Devices International). It is commonly used for bridging USB communication to serial data, and its primary application is in USB-to-RS232 or USB-to-TTL level serial communications.
FT232RQ Pin Function Specification and Circuit Principle
The FT232RQ comes in a 32-pin VQFN (Very Thin Quad Flat No-lead) package. Below is a detailed breakdown of the pin functions for each pin:
Pin Number Pin Name Pin Function 1 VCCIO Power supply for the I/O pins (3.3V or 5V depending on the configuration). 2 TXD Transmit Data output. Sends serial data from the FT232RQ to the target device. 3 RXD Receive Data input. Receives serial data from the target device into the FT232RQ. 4 RTS Request to Send, active low. Used to control flow of data from the FT232RQ. 5 CTS Clear to Send, active low. Used to control flow of data to the FT232RQ. 6 DTR Data Terminal Ready, active low. Indicates readiness for communication. 7 DSR Data Set Ready, active low. Indicates readiness of the connected device. 8 RI Ring Indicator, active low. Indicates incoming phone call or modem event. 9 CD Carrier Detect, active low. Indicates that the modem is receiving a carrier signal. 10 VCC 3.3V or 5V power supply pin, used to power the FT232RQ chip and the associated circuitry. 11 GND Ground connection. 12 D+ USB Data Plus line, part of the USB interface for data transmission. 13 D- USB Data Minus line, part of the USB interface for data transmission. 14 C1+ Capacitor connection for filtering the power supply. 15 C1- Capacitor connection for filtering the power supply. 16 TST Test pin. This is for factory use and debugging purposes. 17 SUSPEND Suspend mode signal. When pulled low, indicates the USB suspend mode. 18 RESET Reset pin, active low. This pin resets the FT232RQ chip and reinitializes its operation. 19 3V3OUT 3.3V output for external circuits that require 3.3V power. 20 GND Ground connection. 21 ADBUS0 USB data line, part of the USB communication. 22 ADBUS1 USB data line, part of the USB communication. 23 ADBUS2 USB data line, part of the USB communication. 24 ADBUS3 USB data line, part of the USB communication. 25 ADBUS4 USB data line, part of the USB communication. 26 ADBUS5 USB data line, part of the USB communication. 27 ADBUS6 USB data line, part of the USB communication. 28 ADBUS7 USB data line, part of the USB communication. 29 ADBUS8 USB data line, part of the USB communication. 30 ADBUS9 USB data line, part of the USB communication. 31 ADBUS10 USB data line, part of the USB communication. 32 ADBUS11 USB data line, part of the USB communication.Frequently Asked Questions (FAQ)
Q: What is the purpose of the FT232RQ? A: The FT232RQ is a USB to serial UART interface converter used to convert USB signals to serial signals for communication with microcontrollers or other serial devices. Q: How does the FT232RQ communicate with a host computer? A: It communicates using the USB protocol, providing a virtual COM port on the host computer. Q: What is the default voltage of the FT232RQ? A: The FT232RQ operates at 3.3V or 5V depending on the configuration set through the VCCIO pin. Q: What type of connector is required for the FT232RQ? A: It uses a USB Type-A connector on one end and connects to a UART-compatible device (e.g., microcontroller, modem) via its TXD/RXD pins. Q: Can the FT232RQ be used to interface with RS232 devices? A: Yes, it can be used to interface with RS232 devices through level-shifting circuitry that adapts the signal voltage levels to RS232 standards. Q: How do I control flow with the FT232RQ? A: You can control data flow using the RTS, CTS, DTR, and DSR pins. Q: What is the SUSPEND pin used for? A: The SUSPEND pin is used to indicate USB suspend mode, which lowers the power consumption of the chip during inactivity. Q: Can the FT232RQ handle both 3.3V and 5V logic? A: Yes, the FT232RQ is capable of operating with both 3.3V and 5V logic depending on the configuration of the VCCIO pin. Q: What is the RESET pin used for? A: The RESET pin is used to reset the FT232RQ chip to its initial state when pulled low.Q: What is the role of the USB D+ and D- pins?
A: D+ and D- are the USB differential data lines that carry communication signals between the FT232RQ and the host computer.Q: How is the FT232RQ powered?
A: The FT232RQ is powered through its VCC pin and can accept either 3.3V or 5V.Q: How can I use the FT232RQ for debugging purposes?
A: You can use the TST pin for factory debugging and testing.Q: What should I connect the VCCIO pin to?
A: The VCCIO pin should be connected to the appropriate power supply voltage (either 3.3V or 5V) for your application.Q: How do I configure the FT232RQ to communicate with different microcontrollers?
A: You can configure the baud rate, flow control, and other serial parameters using software or through the appropriate jumper settings.Q: Can the FT232RQ support high-speed USB communication?
A: Yes, the FT232RQ supports full-speed USB communication (12 Mbps).Q: What is the maximum data transfer rate of the FT232RQ?
A: The FT232RQ can support a maximum data transfer rate of up to 3 Mbps.Q: How can I use the FT232RQ to interface with I2C devices?
A: The FT232RQ is typically used for UART communication, but additional circuitry can be added to interface with I2C devices.Q: Does the FT232RQ support 16-bit data transfer?
A: No, the FT232RQ supports 8-bit data transfer over UART.Q: How do I prevent power issues when using the FT232RQ?
A: Ensure that the VCC and GND pins are correctly connected and that the voltage level matches your device’s requirements.Q: What do the ADBUS pins do?
A: The ADBUS pins are part of the USB interface and are used for high-speed data transfer between the FT232RQ and the host.This detailed guide explains the pin functions, package details, and some frequently asked questions about the FT232RQ model. If you'd like additional clarifications or specific details, feel free to ask!
