CJMCU-4232 Serial Module FT4232HL USB to RS232/RS485/RS422/UART/JTAG/SPI/I2C Board

The CJMCU-4232 Serial Module is a versatile and highly integrated solution designed for converting USB to multiple serial interfaces. It is based on the FT4232HL chip from FTDI, providing a variety of communication options for different applications.

Key Features

1. Integrated Design:
   • Includes a +1.8V LDO regulator for VCORE.
   • Integrated Power-On Reset (POR) function.
   • On-chip clock multiplier PLL (12MHz – 480MHz).
2. Flexible UART Interface:
   • Compatible with FTDI FT232B.
   • Asynchronous serial UART interface with full hardware handshaking and modem interface signals.
   • Supports 7/8 bit data, 1/2 stop bits, and Odd/Even/Mark/Space/No Parity.
   • Auto-transmit enable control for RS485 serial applications using TXDEN pin.
3. Configurable Operations:
   • Operational configuration mode and USB Description strings configurable via external EEPROM over the USB interface.
   • Configurable I/O drive strength (4, 8, 12, or 16mA) and slew rate.
4. Power and Compatibility:
   • Low operating and USB suspend current.
   • Supports bus powered, self-powered, and high-power bus powered USB configurations.
   • Compatible with UHCI/OHCI/EHCI host controllers.
   • USB Bulk data transfer mode (512 byte packets in High-Speed mode).
5. Industrial Grade:
   • +1.8V (chip core) and +3.3V I/O interfacing (+5V tolerant).
   • Operating temperature range: -40°C to 85°C.
   • Compact 64-LD Lead-Free LQFP or QFN package.
   • ESD protection: HBM ±2kV, MM ±200V, CDM ±500V.
6. Extensive Application Support:
   • Dedicated Windows DLLs available for USB to JTAG, USB to SPI, and USB to I2C applications.

Typical Applications

• Serial Interfaces: Single chip USB to four channels UART (RS232, RS422, or RS485) or Bit-Bang interfaces.
• JTAG Interfaces: USB to 2 JTAG channels plus 2 UARTs, or USB to 1 JTAG channel plus 3 UARTs.
• SPI Interfaces: USB to 1 or 2 SPI channels plus 2 or 3 UARTs.
• I2C Interfaces: USB to 2 I2C channels plus 2 UARTs.
• Combination Interfaces: Numerous combinations of 4 channels including UART, JTAG, SPI, and I2C.
• Legacy Upgrades: Upgrading legacy peripheral designs to USB.
• Field Upgradable Products: USB field upgradable products.
• Data Transfer Cables: Cellular and cordless phone USB data transfer cables and interfaces.
• MCU/PLD/FPGA Interfacing: Interfacing MCU/PLD/FPGA based designs to USB.
• Data Transfer: PDA to USB data transfer, USB MP3 player interface, USB flash card reader/writers.
• Industrial and Instrumentation: USB instrumentation, USB industrial control, set-top box PC USB interface, USB digital camera interface, USB bar code readers.

Technical Specifications

• Input Voltage: 5V from USB.
• Dimensions: 61.9x34.9mm

Conclusion

The CJMCU-4232 Serial Module is a robust and flexible solution for anyone needing to connect various serial communication interfaces to a USB port. Its high integration and wide range of supported protocols make it ideal for industrial applications, DIY projects, and upgrading legacy systems. With extensive application support and configurable options, it stands out as a versatile tool for modern electronics and data communication tasks.

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