FT232BL Detailed explanation of pin function specifications and circuit principle instructions

The FT232BL is a specific chip produced by FTDI (Future Technology Devices International), which is commonly used for converting USB signals to UART (serial communication) signals. The FT232BL model is part of the FT232 family of chips and provides an interface between USB and serial devices.

Regarding your request for a detailed explanation of the FT232BL's pin functions, specifications, and circuit principles, here's a breakdown:

Pinout and Functionality

The FT232BL is typically available in a QFN-28 package. This package has 28 pins in total, and each of these pins has specific functions. Below is the detailed pinout along with the functionality for each pin.

Pin Number Pin Name Function Description 1 VCCIO Supply voltage for logic level (3.3V or 5V depending on configuration) 2 GND Ground pin 3 TXD Transmit data, outputs serial data from the FT232BL to the connected device 4 RXD Receive data, inputs serial data to the FT232BL from the connected device 5 RTS# Request to Send, control line for serial communication used in hardware flow control 6 CTS# Clear to Send, control line for serial communication used in hardware flow control 7 DTR# Data Terminal Ready, used for flow control (also an optional handshake signal) 8 DSR# Data Set Ready, used in conjunction with DTR# for handshaking 9 DCD# Data Carrier Detect, signals that the modem is connected 10 RI# Ring Indicator, signals when a telephone line has a call 11 VCC +5V supply voltage pin 12 USB_DM USB Data Minus, USB differential signal (part of the USB communication) 13 USB_DP USB Data Plus, USB differential signal (part of the USB communication) 14 USB_VBUS USB Bus Power (provides 5V from the USB port) 15 PWR Power supply pin 16 SUSPEND# Suspend, controls the USB suspend mode 17 RESET# Reset pin, used to reset the device 18 I2C_SDA Serial Data Line for I2C interface (optional) 19 I2C_SCL Serial Clock Line for I2C interface (optional) 20 CLKOUT Output clock, provides a clock signal (optional) 21 D0 (TXO) UART output data (alternative pin for TXD) 22 D1 (RXI) UART input data (alternative pin for RXD) 23 GND Ground 24 NC No connection 25 NC No connection 26 NC No connection 27 NC No connection 28 NC No connection

Frequently Asked Questions (FAQ)

What is the FT232BL used for? The FT232BL is used for USB to UART (serial) communication, allowing devices with USB ports to interface with serial communication devices. What package is the FT232BL available in? The FT232BL is available in a QFN-28 package with 28 pins. What is the maximum data transfer rate of the FT232BL? The FT232BL supports USB 2.0 Full Speed (12Mbps) data transfer. Can the FT232BL support 5V logic? Yes, the FT232BL can support both 3.3V and 5V logic levels. What is the significance of the RTS# and CTS# pins? RTS# (Request to Send) and CTS# (Clear to Send) are used for hardware flow control in serial communication. Can I use the FT232BL to power external devices? Yes, the FT232BL provides 5V power (VCC) which can be used to power external devices, but it depends on the current requirement of the external device. What does the DTR# pin do? DTR# (Data Terminal Ready) is a signal used for hardware handshaking in serial communication, indicating that the terminal is ready to communicate. Can the FT232BL be used for I2C communication? Yes, the FT232BL has optional I2C support through the SDA and SCL pins. How does the USB interface of the FT232BL work? The FT232BL communicates with USB devices using the USB data lines (USBDM, USBDP) and supports USB 2.0 Full Speed communication.

What is the function of the RESET# pin?

The RESET# pin is used to reset the FT232BL chip to its initial state.

Is the FT232BL compatible with Windows and Linux?

Yes, the FT232BL is compatible with both Windows and Linux operating systems.

Can I use the FT232BL to interface with a microcontroller?

Yes, the FT232BL can be used to interface with microcontrollers through the UART interface.

What does the SUSPEND# pin do?

The SUSPEND# pin is used to indicate if the device is in suspend mode, typically used for power management in USB communication.

What is the function of the VCCIO pin?

VCCIO is used to supply power to the logic levels, and it is selectable between 3.3V and 5V.

Does the FT232BL have any ESD protection?

Yes, the FT232BL includes internal ESD protection to prevent damage from electrostatic discharge.

How many I/O pins does the FT232BL have?

The FT232BL has 8 general-purpose I/O pins, which can be used for various purposes such as data communication or control signals.

What is the maximum current that the FT232BL can supply to external devices?

The FT232BL can supply up to 50mA of current to external devices through the VCC pin.

How do I configure the logic level of the FT232BL?

The logic level of the FT232BL can be configured by setting the VCCIO pin to either 3.3V or 5V.

What is the function of the CLKOUT pin?

The CLKOUT pin provides a clock output for synchronization with other devices.

What is the role of the DCD# and RI# pins?

DCD# (Data Carrier Detect) and RI# (Ring Indicator) are used for signaling in modem applications and are used for detecting modem connection and incoming calls.

This is a detailed overview of the FT232BL, its pinout, and related FAQs, as per your request. Let me know if you need more clarification!