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Design of Low Power Dissipation Keyboard in Wireless Terminals
Luo Rengui * #,Wang Chunhua ,Song Yunyang ,Zheng Liping ,Wu Wuchen
Beijing University of Technology
*Correspondence author
#Submitted by
Subject:
Funding: none
Opened online: 3 October 2005
Accepted by: none
Citation: Luo Rengui ,Wang Chunhua ,Song Yunyang .Design of Low Power Dissipation Keyboard in Wireless Terminals[OL]. [ 3 October 2005] http://en.paper.edu.cn/en_releasepaper/content/3127
 
 
A low-power dissipation keyboard in wireless terminals, based on A/D converter method, is practiced in this paper. Most wireless terminals based on microcontroller have an on-board small keyboard and various switches, using a large number of microcontroller I/O pins then leaving small number of pins available for other uses. The designed keyboard employs only single I/O pins and saves the power dissipation effectively. The power dissipation behaviors of two keyboards, one is based on scanning method and another on A/D converter method, was compared and analyzed. The keyboard has been applied in a practical system.
Keywords: Keyboard A/D Converter Low-power Dissipation Wireless Terminals C8051F0xx
 
 
 

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