Microcontroller to Sensor Interfacing Techniques （单片机对传感器接口技术）.pdfVIP

Microcontroller to Sensor Interfacing Techniques Document Revision: 1.01 Date: 3rd February, 2006 16301 Blue Ridge Road, Missouri City, Texas 77489 Telephone: 1-713-283-9970 Fax: 1-281-416-2806 E-mail: info@ Web: This document is available for download from © 2009 by BiPOM Electronics. All rights reserved. Microcontroller to Sensor Interfacing Techniques. No part of this work may be reproduced in any manner without written permission of BiPOM Electronics. All trademarked names in this manual are the property of respective owners. Overview Micro-controllers are useful to the extent that they communicate with other devices, such as sensors, motors, switches, keypads, displays, memory and even other micro-controllers. Many interface methods have been developed over the years to solve the complex problem of balancing circuit design criteria such as features, cost, size, weight, power consumption, reliability, availability, manufacturability. Many microcontroller designs typically mix multiple interfacing methods. In a very simplistic form, a micro- controller system can be viewed as a system that reads from (monitors) inputs, performs processing and writes to ( controls ) outputs. Input Devices Microcontroller Output Devices Microcontroller Interfaces Digital Analog On/Off Parallel Serial Voltage Current Asynchronous Synchronous 1-wire 2-wire (I2C) RS232/RS485 4-wire (SPI, Microwire)