可编程定时/计数器8253在扬声器中的应用  

Application of the Programmable Timer/Counter 8253 to the Driving System of Louder Speaker

作　　者：赵艳杰[1] 李君芳[2] 

机构地区：[1]许昌学院,河南许昌461000 [2]漯河职业技术学院,河南漯河461002

出　　处：《现代电子技术》2007年第11期175-176,180,共3页Modern Electronics Technique

摘　　要：可编程定时/计数器是一种使用很广泛的定时/计数器,他可以通过编程实现很多功能。通过分析可编程定时/计数器的工作原理,研究出可编程定时/计数器在扬声器发声应用中的编程方法,在程序中只要更改一下输入时钟频率或计数初值即可实现利用可编程定时/计数器8253驱动扬声器发出各种频率的声音。The programmable time/counter is on kind of used very widespread time/counter,it may through the programming realize multi- purpose. Through analyzing the principle of programmable time/counter, studies the programmable time/ counter in speaker sound production application programming method,in procedure so long as change clock input frequency or count the starting value then to realize using the programmable fixed time/counter 8253 to actuate the speaker to send out each kind of frequency the sound.

关 键 词：可编程定时/计数器 方式控制字 扬声器 时钟频率 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]