FT2232D datasheet(5/56 Pages) FTDI

5 / 56 page

DS2232D Version 0.91

FT2232D Dual USB UART / FIFO I.C.

•

Programmable Receive Buffer Timeout

The TX buffer timeout is programmable over USB in

1ms increments from 1ms to 255ms, thus allowing

the device to be better optimised for protocols

requiring faster response times from short data

packets.

•

Relaxed VCC Decoupling

The improved level of Vcc decoupling that was

incorporated into BM devices has also been

implemented in the FT2232D device.

•

Baud Rate Pre-Scaler Divisors

The FT2232D (UART mode) baud rate pre-scaler

supports division by (n+0), (n+0.125), (n+0.25),

(n+0.375), (n+0.5), (n+0.625), (n+0.75) and (n+0.875)

where n is an integer between 2 and 16,384 (214).

•

Extended EEPROM Support

The FT2232D supports 93C46 (64 x 16 bit), 93C56

(128 x 16 bit), and 93C66 (256 x 16 bit) EEPROMs.

The extra space is not used by the device, however

it is available for use by other external MCU / logic

whilst the FT2232D is being held in reset. There is

now an adiitional 64 words of space available (128

bytes total) in the user area when a 93C56 or 93C66

is used.

•

USB 2.0 (full speed option)

An EEPROM based option allows the FT2232D to

return a USB 2.0 device descriptor as opposed to

USB 1.1. Note : The device would be a USB 2.0 Full

Speed device (12Mb/s) as opposed to a USB 2.0

High Speed device (480Mb/s).

FT2232D Datasheet(PDF) 5 Page - Future Technology Devices International Ltd.