XR16L784数据手册开发板套件编程器的评估演示板及套件规格书PDF

描述 Description

The XR16L7841 is a four-channel Universal Asynchronous Receiver and Transmitter (UART). The device is designed for high bandwidth requirements in communication systems. The XR16L784 (784) integrates the functions of four enhanced 16550 UARTs, a general purpose 16-bit timer/counter and an on-chip oscillator. The device configuration registers include a set of four consecutive interrupt source registers that provides interrupt-status for all four UARTs, timer/counter, and a sleep wake up indicator.
Each UART channel has its own 16550 UART-compatible configuration register set for individual channel control, status, and data transfer. Additionally, each UART channel has 64-byte transmit and receive FIFOs, automatic RTS/CTS or DTR/DSR hardware flow control with hysteresis control, and automatic Xon/Xoff and special character software flow control. The XR16L784 also has programmable transmit and receive FIFO trigger levels, FIFO level counters, infrared encoder and decoder (IrDA ver 1.0), and a programmable baud rate generator with a prescaler of divide by one or four, and data rate up to 6.25 Mbps with 8x sampling clock rate.
NOTE: 1 Covered by U.S. Patents #5,649,122 and #5,832,205
For UART technical support or to obtain an IBIS model for this product, please email Exar's UART Technical Support group.

特性 Features

·5V and 3.3V Operation with 5V Tolerant Inputs·8-bit Intel or Motorola Data Bus Interface·Single Open Drain Interrupt for all 4 channels·Global Interrupt Source Registers for all channels·Fifth Generation “Flat” Register Set·16C550-Compatible Registers·64-byte Transmit and Receive FIFO·Transmit and Receive FIFO Level Counters·Programmable TX and RX FIFO Level Trigger·Automatic RTS/CTS or DTR/DSR Flow Control·RS485 Half-duplex Control with Selectable Delay·Programmable Data Rate with Prescaler·64-pin LQFP Package·Pb-Free, RoHS Compliant Versions Offered

应用 Application

·Remote Access Servers·Ethernet Network to Serial Ports·Network Management·Factory Automation and Process Control·Point-of-Sale Systems·Multi-port RS-232/RS-422/RS-485 Cards