描述 Description

General Description
The FT2232D is a USB interface which incorporates the functionallity of two of FTDI’s second generation BM chips into a single device. A single downstream USB port is converted to two IO channels which can each be individually configured as a FT232BM-style UART interface, or a FT245BM-style FIFO interface, without the need to add a USB hub. There are also several new special modes which are either enabled in the external EEPROM, or by using driver commands. These include Synchronous Bit-Bang Mode, a CPU-Style FIFO Interface Mode, a Multi-Protocol Synchronous Serial Engine Interface Mode, MCU Host Bus Emulation Mode, and Fast Opto-Isolated Serial Interface Mode.Features Summary
Hardware

特性 Features

? Single chip USB to dual channel serial / parallel ports with a variety of configurations.
? Entire USB protocol handled on the chip...no USB specific firmware programming required.
? FT232B-style asynchronous serial UART interface option with full hardware handshaking and modem interface signals.
? UART Interface supports 7 / 8 bit data, 1 / 2 stop bits, and Odd / Even / Mark / Space / No Parity
? Fully assisted hardware or X-On / X-Off software handshaking.
? Transfer Data Rate 300 to 1 Mega Baud (RS232).
? Transfer Data Rate 300 to 3 Mega Baud (at TTL levels and RS422 / RS485).
? Auto transmit enable control for RS485 serial applications using TXDEN pin.
? In-built support for event characters and line break condition.
? Transmit and receive LED drive signals on each channel.
? FT245B-style FIFO interface option with bidirectional data bus and simple 4 wire handshake interface.
? USB to parallel FIFO transfer data rate up to 1 megabyte / second.
? Adjustable receive buffer timeout.
? Enhanced bit-bang Mode interface option with RD# and WR# strobes.
? New synchronous bit-bang mode interface option with RD# and WR# strobes.
? New Multi-Protocol Synchronous Serial Engine (MPSSE) interface option.
? New CPU-style FIFO interface mode option.
? New MCU host bus emulation mode option.
? New fast opto-Isolated serial interface mode option
? High I/O pin output drive option.
? Interface mode and USB Description strings configurable in external EEPROM.
? EEPROM Configurable on board via USB
? Support for USB suspend and resume conditions via PWREN#, and SI/WU pins.
? Support for bus powered, self powered, and high power bus powered USB configurations.
? Integrated power-on-reset circuit, with optional reset input and reset Output pins.
? 5V and 3.3V logic I/O Interfacing with independent level conversion on each channel.
? Integrated 3.3V LDO regulator for USB I/O
? Integrated 6MHz – 48Mhz clock multiplier PLL
? USB Bulk data transfer mode.
? 4.35V to 5.25V single supply operating voltage range.
? Low operating and USB suspend current.
? UHCI / OHCI / EHCI host controller compatible.
? USB 2.0 Full Speed (12 Mbits / Second) compatible.
? Extended -40°C to 85°C industrial operating tem perature range.
? Compact 48-LD Lead Free LQFP package
? FTDI’s royalty-free VCP and D2XX drivers eliminate the requirement for USB driver development in most cases.
? Dedicated Windows DLLs available for USB to JTAG, USB to SPI, and USB to I2C applications.Typical Applications
? USB to Dual Port RS232 Converters
? USB to Dual Port RS422 / RS485 Converters
? Upgrading Legacy Peripheral Designs to USB
? USB Instrumentation
? USB JTAG Programming
? USB to SPI Bus Interfaces
? USB Industrial Control
? Field Upgradable USB Products
? Galvanically Isolated Products with USB Interface
? USB to synchronous serial 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?