通信接口ic ft245bl

 hardware features
• single chip usb ? parallel fifo bi-directional data transfer
• transfer data rate to 1m byte / sec - d2xx drivers
• transfer data rate to 300 kilobyte / sec - vcp drivers
• simple to interface to mcu / pld/ fpga logic with a 4 wire handshake interface
• entire usb protocol handled on-chip… no usb-specific firmware programming required
• ftdi’s royalty-free vcp and d2xx drivers eliminate the requirement for usb driver development in most cases.
• 384 byte fifo tx buffer / 128 byte fifo rx buffer for high data throughput.
• new send immediate support via si pin for optimised data throughput.
• support for usb suspend / resume through pwren# and wakeup pins.
• support for high power usb bus powered devices through pwren# pin
• adjustable rx buffer timeout
• in-built support for event characters
• integrated level converter on fifo and control signals for interfacing to 5v and 3.3v logic
• integrated 3.3v regulator for usb io
• integrated power-on-reset circuit
• integrated 6mhz – 48mhz clock multiplier pll
• usb bulk or isochronous data transfer modes
• new bit-bang mode allows the data bus to be used as an 8 bit general purpose io port without the need for mcu or other support logic.
• 4.35v to 5.25v single supply operation
• uhci / ohci / ehci host controller compatible
• usb 1.1 and usb 2.0 compatible
• usb vid, pid , serial number and product description strings in external eeprom
• eeprom programmable on-board via usb
• compact lead free rohs compliant 32-ld lqfp package
virtual com port (vcp) drivers for
- windows 98 and windows 98 se
- windows 2000 / me / server 2003 / xp
- windows xp 64 bit
- windows xp embedded
- windows ce 4.2
- mac os-8 and os-9
- mac os-x
- linux 2.40 and greater
d2xx (usb direct drivers + dll s/w interface)
- windows 98 and windows 98 se
- windows 2000 / me / server 2003 / xp
- windows xp 64 bit
- windows xp embedded
- windows ce 4.2
- linux 2.4 and greater
application areas
- easy mcu / pld / fpga interface to usb
- upgrading legacy peripheral designs to usb
- usb instrumentation
- usb industrial control
- usb audio and low bandwidth video data transfer
- pda ? usb data transfer
- usb mp3 player interface
- usb flash card reader / writers
- set top box (s.t.b.) pc - usb interface
- usb digital camera interface
- usb hardware modems
- usb wireless modems