双口RAM在低频时码信号采集系统中的应用  

Application of Dual Port RAM to Low-Frequency Time-Code Signal Acquisition System

作　　者：冯平[1] 许林生[1] 白燕[1] 吴贵臣[1] 

机构地区：[1]中国科学院国家授时中心

出　　处：《时间频率学报》2003年第2期119-125,共7页Journal of Time and Frequency

摘　　要：介绍了一种快速双口RAM芯片IDT70 2 6的结构特点和功能 ,并将其应用于低频时码信号采集系统中 ,从而实现了DSP(数字信号处理器 )和单片机进行快速数据传输和数据共享的任务 ,给出了通过该芯片进行DSP和单片机通信的具体接口电路 ,并针对低频时码信号采集系统中交换数据的仲裁方式 ,提出了令牌传递和软件判优两种实现方法。The structure characteristics and function of IDT7026,a dual port RAM chip,are introduced,which has been applied to the low-frequency time-code signal acquisition system so as to realize the data transfer and sharing between DSP(Digital Signal Processor)and single chip.A practical interface circuit used for communication between DSP and single chip via IDT7026 is presented.Two ways,i.e.token transfer and software arbitration are brought forward to realize the arbitration mode for data exchange in low-frequeney time-code signal acquisition system.

关 键 词：双口RAM 低频时码 单片机 信号采集 数字信号处理器 

分 类 号：P127[天文地球—天体测量]