基于PCF8563的数字钟FPGA设计与实现

FPGA Design and Implementation of Digital clock Based on PCF8563

摘要:

针对基于时钟芯片的数字钟系统进行了研究,采用FPGA作为主控芯片通过I_²C总线实现对实时时钟芯片PCF8563的读写控制,实现了时钟/日历切换显示,对时钟/日历手动调校。在调校状态下,实现了数据移位时数码管闪烁指示功能。给出了系统设计以及FPGA各模块详细设计,通过SignalTap逻辑分析仪,验证了系统功能实现的技术可行性,并在开发板上完成调试,对FPGA开发人员有一定的借鉴意义。

Abstract:

The digital clock system based on clock chip is studied.FPGA was used as the control chip to realize the read-write control of PCF8563 based on I2C bus.At the same time,the switch display of clock/calendar and manual adjustment of clock/calendar were also realized.Under adjustment state,the flickering in dication function of the digital tube was realized when the data-shift.The system design progarm and the detailed design of each module of FPGA were given.The technical feasibility of the system function was verified by the signal tap logic analyzer,and completed debugging on development board. This paper can provide certain reference for FPGA developers.