The FT4232HL is a USB 2.0 High Speed (480Mb/s) to UART/MPSSE ICs. The device features 4 UARTs. Two of these have an option to independently configure an MPSSE engine. This allows the FT4232HL to operate as two UART/Bit-Bang ports plus two MPSSE engines used to emulate JTAG, SPI, I2C, Bit-bang or other synchronous serial modes.

The FT4232HL has the following advanced features:
Single chip USB to quad serial ports with a variety of configurations.
Independent Baud rate generators.
FTDI's royalty-free Virtual Com Port (VCP) and Direct (D2XX) drivers eliminate the requirement for USB driver development in most cases.
Optional traffic TX/RX indicators can be added with LEDs and an external 74HC595 shift register.
Adjustable receive buffer timeout.
Support for USB suspend and resume conditions via PWREN#, SUSPEND# and RI# pins.
Highly integrated design includes +1.8V LDO regulator for VCORE, integrated POR function and on chip clock multiplier PLL (12MHz–480MHz).
FTDI FT232B style, asynchronous serial UART interface option with full hardware handshaking and modem interface signals.
Fully assisted hardware or X-On / X-Off software handshaking. UART Interface 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. Operational configuration mode and USB description strings configurable in external EEPROM over the USB interface.
UHCI/OHCI/EHCI host controller compatible.
USB Bulk data transfer mode (512 byte packets in High Speed mode). Dedicated Windows DLLs available for USB to JTAG, USB to SPI, and USB to I2C applications.
+1.8V (chip core) and +3.3V I/O interfacing (+5V Tolerant).
Extended -40°C to 85°C industrial operating temperature range.
+3.3V single supply operating voltage range.
ESD protection for FT4232HL IO's:Human Body Model (HBM) ±2kV, Machine Mode (MM) ±200V,Charge Device Model (CDM) ±500V.