FT4232HL Development / Application Board | USB to UART, SPI, JTAG, I2C

FT4232HL Development / Application Board | USB to UART, SPI, JTAG, I2C

The FT4232HL enables USB connectivity to multiple interfaces such as UART, SPI, JTAG, and I2C. Its compact design, ESD protection, and OpenOCD support make it ideal for development and debugging.

Specification:

• Chip: FT4232HL

• Dimensions (overall): 103 × 45 × 14 mm (4.06 × 1.77 × 0.55 in)

• PCB Dimensions: 95 × 45 × 1.6 mm (3.74 × 1.77 × 0.06 in)

• Power: +5V via USB connector (CN3)

• Supported Interfaces: UART, SPI, JTAG, I2C

• Connectors:

  • CN1: 1×20 Pin, 2.54 mm
  • CN2: 1×20 Pin, 2.54 mm
  • CN4: 2×10 Pin, 2.54 mm, angled connector

• Protection: ESD protection circuit on CN3 and CN4

• OS Support: Windows, macOS, Linux

• Usage: Development, debugging, OpenOCD, connecting external modules

• Package Contents:
  1× FT4232HL development board
  1× USB cable (0.5m)
  10× Dupont cables
  1× Plastic case

Simple Usage Steps

• LED1 is the power indicator. It stays lit when power is supplied.

• After installing the driver CDM21228_Setup, the FT4232HL is typically configured as a USB to dual serial port.

• Using serial communication software on your PC, both serial ports can be easily tested.

• Connect two Dupont wires for cross-connection of the serial ports:

  • ADBUS0 (TXD) → BDBUS1 (RXD)
  • ADBUS1 (RXD) → BDBUS0 (TXD)

• U7 (74HC573) is connected to BDBUS and controls the signal LED indicators.

• When the board is powered on, some LEDs may briefly blink – this is normal.

• If BDBUS is used as a serial port and is open, the red LED LED5 stays lit, indicating hardware flow control – this is normal.