AVR微控制器的多CPU共享高精度实时时钟系统  

High-precision Real-time Clock System Shared By Muti-CPU Based on AVR Microcontroller

作　　者：付国新[1] 江晓亮[1] 

机构地区：[1]国电南京自动化股份有限公司,南京210003

出　　处：《单片机与嵌入式系统应用》2017年第10期78-81,共4页Microcontrollers & Embedded Systems

摘　　要：基于AVR微控制器设计了一种高精度、稳定准确的实时时钟系统,多CPU通过高速SPI总线共享时钟信息,给出了硬件系统的设计方法和软件系统的设计流程,该设计已经在电力系统故障录波装置中成功应用,具有一定的推广价值。In the paper, a high-precision, accuracy, stable real-time clock system is designed based on AVR microcontroller.Muti-CPU can share time by the high speed SPI.The hardware design and software flow of the clock system are given.This design has been applied in the power system fault recorder and it is feasible and useful.

关 键 词：AVR微控制器 SPI总线 TWI总线 IRIGB码 

分 类 号：TM76[电气工程—电力系统及自动化] TP332[自动化与计算机技术—计算机系统结构]