摘要
描述了一种简易的交流数字电压表的系统设计。系统以MSP430F448为核心,该单片机内部集成了12位的A/D转换器,转换器带有内部参考源、采样保持、自动扫描特性,极大地简化了硬件设计。因为单片机内部中断资源丰富,电压转换、定时等都采用中断触发,减少了系统响应时间,提高了软件执行效率。此外该单片机的液晶驱动能力可达160段,可以直接将A/D转化数据显示在LCD上。
A kind of simple and easy communication system design of the digital voltmeter is proposed.The designer based on MSP430F448,this single chip inside integrated 12 A/D converter,It has internal reference source,the sampling keep,auto scan characteristics,greatly simplified the hardware design.Because single chip internal interrupt is rich,voltage conversion,timing and other modules are triggered by interrupt,it can reduce the system response time and improve software efficiency in this way.In addition the MCU liquid crystal drive capacity of up to 160 section,A/D transformation data can directly show by LCD.
出处
《电子设计工程》
2012年第2期144-147,共4页
Electronic Design Engineering