XR21V1412IL32 EXAR [Exar Corporation], XR21V1412IL32 Datasheet
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XR21V1412IL32
Manufacturer Part Number
XR21V1412IL32
Description
2-CH FULL-SPEED USB UART
Manufacturer
EXAR [Exar Corporation]
Datasheet
1.XR21V1412IL32.pdf
(24 pages)
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Company:
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Manufacturer:
EXAR
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JUNE 2009
GENERAL DESCRIPTION
The XR21V1412 (V1412) is an enhanced 2-channel
Universal Asynchronous Receiver and Transmitter
(UART) with a USB interface. The USB interface is
fully compliant to Full Speed USB 2.0 specification
that supports 12 Mbps USB data transfer rate. The
USB interface also supports USB suspend, resume
and remote wakeup operations.
The V1412 operates from an internal 48MHz clock
therefore no external crystal/oscillator is required like
previous generation UARTs. With the fractional baud
rate generator, any baud rate can accurately be
generated using the internal 48MHz clock.
The large 128-byte FIFO and 384-byte RX FIFO of
the V1412 helps to optimize the overall data
throughput for various applications. The Automatic
Transceiver Direction control feature simplifies both
the hardware and software for half-duplex RS-485
applications. If required, the multidrop (9-bit) mode
with automatic half-duplex transceiver control feature
further
applications.
The V1412 operates from a single 2.97 to 3.63 volt
power supply and has 5V tolerant inputs. The V1412
is available in a 32-pin QFN package.
Software drivers for Windows 2000, XP, Vista, and
CE, as well as Linux and Mac are supported for the
XR21V1412.
APPLICATIONS
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Exar
Portable Appliances
External Converters (dongles)
Battery-Operated Devices
Cellular Data Devices
Factory Automation and Process Controls
Industrial applications
Corporation 48720 Kato Road, Fremont CA, 94538
simplifies
typical
multidrop
RS-485
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(510) 668-7000
FEATURES
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USB 2.0 Compliant Interface
Enhanced Features of each UART
Internal 48 MHz clock
Single 2.97-3.63V power supply
5V tolerant inputs
32-pin QFN package
Virtual COM Port drivers
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Supports 12 Mbps USB full-speed data rate
Supports USB suspend, resume and remote
wakeup operations
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
Automatic Hardware (RTS/CTS or DTR/DSR)
Flow Control
Automatic Software (Xon/Xoff) Flow Control
Multidrop
Transceiver Control
Multidrop mode w/ Auto TX Enable
Half-Duplex mode
Sleep Mode with Remote Wake-up
Selectable GPIO or Modem I/O
Windows 2000, XP and Vista
Windows CE 4.2, 5.0, 6.0
Linux
Mac
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FAX (510) 668-7017
2-CH FULL-SPEED USB UART
mode
w/
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www.exar.com
Auto
XR21V1412
Half-Duplex
REV. 1.0.0