摘要
本文利用CPLD对上海精天电子仪器有限公司生产的电子天平中主要数字电路进行替换,提高了系统的集成度,有效地减少了电路的布线面积。通过使用单独一块CPLD可以实现电子天平中时钟分频,脉冲信号采集等功能。文中给出了CPLD的原理图设计和VHDL语言的描述。波形仿真和芯片实验结果表明CPLD实现了原来数字电路的所有功能。
In order to improve the integrated level of the system and decrease the wiring area of the circuit effectively,the main digital circuits of electronic balance manufactured by Shanghai Jingtian Electronic Instrument Co.,Ltd.are replaced with CPLD.By taking advantage of a single CPLD chip,some functions such as clock divider and pulse signal collecting are realized.In this paper,the schematic diagram of CPLD and the description of VHDL language are described.Waveform simulation and chip experiment results show that CPLD implements all the features of the original digital circuits..
出处
《微计算机信息》
2012年第9期21-22,50,共3页
Control & Automation
