UART Enhancements Simplify Software and Hardware Design

EXAR has developed a Universal Asynchronous Receiver and Transmitter (UART) that integrates enhanced features to simplify the design of hardware and software used in industrial networks.

These features include automatic RTS/CTS or DTR/DSR hardware flow control with programmable hysteresis, automatic software flow control and RS-485 half-duplex direction control with programmable turn-around delay.

The XR16V798 and XR16M698 are octal UARTs supporting data rates up to 16Mb/s, to service the high-bandwidth requirements of industrial systems. The global interrupt-source register provides a complete interrupt-status indication for all eight channels to speed up interrupt parsing.

Each UART has its own 16C550-compatible set of configuration registers, up to 64-byte transmit and receive FIFOs, fully-programmable transmit and receive FIFO trigger levels, and transmit and receive FIFO-level counters.

 

FEATURES <16Mbit/s data rates <64 bytes transmit and receive FIFOs Automatic RTS/CTS flow control Automatic XON/XOFF flow control Automatic RS-485 half-duplex direction control Fractional baud-rate generator Sleep mode

APPLICATIONS Remote-access servers Ethernet network to serial ports connections Network management Factory automation and process control Point-of-sale systems Multi-port RS-232, RS-422 and RS-485 cards

 

 

Exar / XR16V798 and XR16M698