FT8U245AM
USB FIFO - Fast Parallel Data Transfer IC
FEATURES
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Single Chip Fast Data Transfer Solution
Send / Receive Data over USB at up to 1 M
Bytes / sec
384 byte FIFO Transmit buffer / 128 byte FIFO
receive buffer for high data throughput
Simple interface to CPU or MCU bus
No in-depth knowledge of USB required as all
USB Protocol is handled automatically within
the I.C.
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FTDI’s Virtual COM port drivers eliminate the
need for USB driver development in most
cases.
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Compact 32 pin ( 7mm x 7mm ) MQFP package
Integrated 6MHz - 48MHz Clock Multiplier aids
FCC and CE compliance
Integrated 3.3v Regulator – No External
Regulator Required
4.4v .. 5.25v Single Supply Operation
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UHCI / OHCI Compliant
USB 1.1 Specification Compliant
USB VID, PID, Serial Number and Product
Description Strings in external E2PROM.
Virtual COM Port Drivers for –
Windows 98 and Windows 98 SE
Windows 2000
Windows Millennium **
Apple iMAC **
Linux **
Application Areas
USB ISDN and ADSL Modems
High Speed USB
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PDA Communications
USB I/F for Digital Cameras
USB I/F for MP3 players
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USB data transfer cables
USB
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USB null-modem cables
USB
High Speed USB Instrumentation
GENERAL DESCRIPTION
The FT8U245AM provides an easy cost-effective method of transferring data to / from a peripheral and a
host P.C. at up to 8 Million bits ( 1 Megabyte ) per second. It’s simple FIFO-like design makes it easy to interface
to any CPU ( MCU ) either by mapping the device into the Memory / IO map of the CPU, using DMA or controlling
the device via IO ports.
To send data from the peripheral to the host P.C. simply write the byte wide data into the device when the
transmitter empty status bit is not active. If the ( 384 byte ) transmit buffer fills up, the device de-asserts
transmit empty in order to stop further data being written to the device until some of the FIFO data has been
transferred over USB.
When the host P.C. sends data to the peripheral over USB, the device will assert the receiver full status
bit to let the peripheral know that data is available. The peripheral then reads the data until the receiver full
status bit goes inactive, indicating no more data is available to read.
By using FTDI’s virtual COM Port drivers, the peripheral looks like a standard COM Port to the application
software. Commands to set the baud rate are ignored – the device always transfers data at it’s fastest rate
regardless of the application’s baud rate setting.
Future Technology Devices Intl.
FT8U245AM Preliminary Information Rev 0.9 – Subject to Change
FTDI [ FUTURE TECHNOLOGY DEVICES INTERNATIONAL LTD. ]
