XR21V1414IM48-F产品概述
The XR21V1414 (V1414) is an enhanced 4-channel USB Universal Asynchronous Receiver and Transmitter (UART). 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 V1414 operates from an internal 48 MHz 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 48 MHz clock. The large 128-byte FIFO and 384-byte RX FIFO of the V1414 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 simplifies typical multidrop RS-485 applications. The V1414 operates from a single 2.97 to 3.63 volt power supply and has 5 V tolerant inputs. The V1414 is available in a 48-pin TQFP package.
Features:
USB 2.0 Compliant Interface
Supports 12 Mbps USB full-speed data rate
Supports USB suspend, resume and remote wakeup operations
Enhanced Features of each UART
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 mode w/ Auto Half-Duplex Transceiver Control
Multidrop mode w/ Auto TX Enable
Half-Duplex mode
Sleep Mode with Remote Wake-up
Selectable GPIO or Modem I/O
