New FTDI chips for USB2.0

Key Hardware Features for both types:
- Single chip USB to dual serial / parallel ports with a variety of configurations
- Entire USB protocol handled on the chip. No USB specific firmware programming required
- USB 2.0 High Speed (480Mbits/second) and Full Speed (12Mbits/second) compatible
- Independent Baud rate generators
- RS232/RS422/RS485 UART Transfer Data Rate up to 12Mbaud. (RS232 Data Rate limited by external level shifter)
- FTDI’s royalty-free Virtual Com Port (VCP) and Direct (D2XX) drivers eliminate the requirement for USB driver development in most cases
- Adjustable receive buffer timeout
- Highly integrated design includes +1.8V LDO regulator for VCORE, integrated POR function and on chip clock multiplier PLL (12MHz – 480MHz}
- 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
- Configurable I/O drive strength (4,8,12 or 16mA) and slew rate
- Low operating and USB suspend current
- Supports bus powered, self powered and high-power bus powered USB configurations
- UHCI/OHCI/EHCI host controller compatible
- USB Bulk data transfer mode (512 byte packets in Hi-Speed mode)
- +1.8V (chip core) and +3.3V I/O interfacing (+5V Tolerant)
- Extended -40°C to 85°C industrial operating temperature range
- Compact 64-LD Lead Free LQFP or LQFN package
- +3.3V single supply operating voltage range

Internal block diagram is almost similar for both ICs:

FT4232H Key Hardware Features:
- Two Multi-Protocol Synchronous Serial Engine (MPSSE) on channel A and channel B, to simplify synchronous serial protocol (USB to JTAG, I2C, SPI or bit-bang) design
- Optional traffic TX/RX indicators can be added with LEDs and an external 74HC595 shift register
- FTDI FT232B style, asynchronous serial UART interface option with full hardware handshaking and modem interface signals
- Dedicated Windows DLLs available for USB to JTAG, USB to SPI, and USB to I2C applications

Applications area:
- Single chip USB to four channels UART (RS232,RS422 or RS485) or Bit-Bang interfaces
- Single chip USB to 2 JTAG channels plus 2 UARTs
- Single chip USB to 1 JTAG channel plus 3 UARTs
- Single chip USB to 1 SPI channel plus 3 UARTs
- Single chip USB to 2 SPI channels plus 2 UARTs
- Single chip USB to 2 Bit-Bang channels plus 2 UARTs
- Single chip USB to 1 SPI channel, plus 1 JTAG channel plus 2 UARTs
- Single chip USB to 2 I2C channels plus 2 UARTs
- Numerous combinations of 4 channels
- Upgrading Legacy Peripheral Designs to USB
- Field Upgradable USB Products
- Galvanic Isolated Products with USB Interface
- Cellular and cordless phone USB data transfer cables and interfaces
- Interfacing MCU / PLD / FPGA based designs to USB
- USB Audio and Low Bandwidth Video data transfer
- PDA to USB data transfer
- USB Smart Card Readers
- USB Instrumentation
- USB Industrial Control
- USB MP3 Player Interface
- USB FLASH Card Reader/Writers
- Set Top Box PC - USB interface
- USB Digital Camera Interface
- USB Bar Code Readers

Tab. 1: FT4232H pin functions

Obr. 2: FT4232H configuration - multi device EEPROM Programmer

FT2232H Key Hardware Features:
- Dual Multi-Protocol Synchronous Serial Engine (MPSSE) to simplify synchronous serial protocol (USB to JTAG, I2C, SPI or bit-bang) design
- Dual Multi-Protocol Synchronous Serial Engine (MPSSE) to simplify synchronous serial protocol (USB to JTAG, I2C, SPI or bit-bang) design
- Dual independent UART or FIFO ports configurable using MPSSEs
- USB to parallel FIFO transfer data rate up to 10Mbyte/sec
- Single channel synchronous FIFO mode for transfers > 25 Mbytes/sec
- CPU-style FIFO interface mode simplifies CPU interface design
- MCU host bus emulation mode configuration option
- Fast Opto-Isolated serial interface option
- Option for transmit and receive LED drive signals on each channel
- Enhanced bit-bang Mode interface option with RD# and WR# strobes
- FT245B-style FIFO interface option with bidirectional data bus and simple 4 wire handshake interface
- Asynchronous serial UART interface option with full hardware handshaking and modem interface signals
- Dual independent UART or FIFO ports configurable using MPSSEs
- USB to parallel FIFO transfer data rate up to 10Mbyte/sec
- Single channel synchronous FIFO mode for transfers > 25 Mbytes/sec
- CPU-style FIFO interface mode simplifies CPU interface design
- MCU host bus emulation mode configuration option
- Fast Opto-Isolated serial interface option
- Option for transmit and receive LED drive signals on each channel
- Enhanced bit-bang Mode interface option with RD# and WR# strobes
- FT245B-style FIFO interface option with bidirectional data bus and simple 4 wire handshake interface
- Asynchronous serial UART interface option with full hardware handshaking and modem interface signals

Tab. 2: FT2232H pin functions

FT2232H Applications Area:
- Single chip USB to dual channel UART (RS232, RS422 or RS485)
- Single chip USB to dual channel FIFO.
- Single chip USB to dual channel JTAG
- Single chip USB to dual channel SPI
- Single chip USB to dual channel I2C
- Single chip USB to dual channel Bit-Bang
- Single chip USB to dual combination of any of above interfaces
- Single chip USB to Fast Serial Optic Interface
- Single chip USB to CPU target interface (as memory), double and independent
- Single chip USB to Host Bus Emulation (as CPU)
- USB Audio and Low Bandwidth Video data transfer
- PDA to USB data transfer
- USB Smart Card Readers
- USB Instrumentation
- USB Industrial Control
- USB MP3 Player Interface
- USB FLASH Card Reader / Writers
- Set Top Box PC - USB interface
- USB Digital Camera Interface
- USB Bar Code Readers



Obr. 3: FT2232H configuration - multi device EEPROM Programmer