XR68C681数据手册集成电路（IC）的UART（通用异步接收器发送器）规格书PDF

描述 Description

The EXAR Dual Universal Asynchronous Receiver and Transmitter (DUART) is a data communications device that provides two fully independent full duplex asynchronous communications channels in a single package. The DUART is designed for use in microprocessor based systems and may be used in a polled or interrupt driven environment.
The XR-68C681 device offers a single IC solution for the 68000 family of microprocessors.
The DUART is fabricated using advanced two layer metal, with a high performance density EPI/CMOS 1.8 process to provide high performance and low power consumption, and is packaged in a 40 pin DIP or a 44 pin PLCC.
For UART technical support or to obtain an IBIS model for this product, please email Exar's UART Technical Support group.

特性 Features

·Two Full Duplex, Independent Channels·Asynchronous Receiver and Transmitter·Quadruple-Buffered Receiver, Dual Buffered Transmitter·Programmable Stop Bits in 1/16 Bit Increments·Internal Bit Rate Generators with 23 Different Bit Rates·Independent Bit Rate Selection for Each Transmitter and Receiver·External Clock Capability·Maximum Bit Rate: 1X Clock - 1Mb/s, 16X Clock - 125Kb/s·Normal, AUTOECHO, Local LOOPBACK and Remote LOOPBACK Modes·Multi-function 16 Bit Counter/Timer·Interrupt Output with Eight Maskable Interrupt Conditions·Interrupt Vector Output on Acknowledge·8 General Purpose Outputs·6 General Purpose Inputs with Change of States Detectors on Inputs·On-chip Oscillator for Crystal·Standby Mode to Reduce Operating Power·Compatible with the Motorola MC68681 and the Signetic SCC68692 Devices·Advanced CMOS Low Power Technology·Pb-Free, RoHS Compliant Versions Offered

应用 Application

·Multimedia Systems·Serial to Parallel/Parallel to Serial Converter·DTE for Modem Communication Systems