EXAR USB to Serial UART Adapter for Windows 7/Vista 2008 and CE

Single Channel USB UART

FeATUReS

Supports 12 Mbps USB

full-speed data rate



Supports USB suspend, resume

and remote wakeup operations

• Enhanced UART Features

Data rates up to 12 Mbps



Fractional Baud Rate Generator



128 byte TX FIFO



384 byte RX FIFO



7, 8 or 9 data bits



1 or 2 stop bits



Odd, even, mark, space

or no parity



Automatic Hardware (RTS/CTS

or DTR/DSR) Flow Control



Automatic Software (Xon/Xoff)

Flow Control



Multidrop mode



Auto Transceiver Control



Half-Duplex mode



Selectable GPIO or Modem I/O

• Internal 48 MHz clock with

clock divisors programmable

down to 6 MHz

• Single 5V power supply

• 16-pin QFN package

• Virtual COM Port drivers

Windows 7, 2000, XP and

Vista



Windows CE 4.2, 5.0, 6.0



Linux



Mac

The B1411 operates from an internal clock that is programmable to 6, 12, 24 or

48 MHz. Therefore, no external crystal / oscillator is required as in previous

generation UARTs. With the fractional baud rate generator, any baud rate up to

12 Mbps can be accurately generated using the internal clock.

The large 128-byte TX FIFO and 384-byte RX FIFO of the B1411 help to optimize

the overall data throughput for various applications. The Automatic Transceiver

Direction control feature simplifies both the hardware and software for halfduplex

RS-485 applications. If required, the multidrop (9-bit) mode with

automatic half-duplex transceiver control feature further simplifies typical

multidrop RS-485 applications.