基于PCI总线的数码管现场显示控制卡设计

Design of Controlling Card Based on PCI Bus for Digital Tube Field Display

PCI总线是先进的高性能32/64位局部总线,易于实现高速实时的I/O口控制卡、通信接口卡。论文设计了一种基于CH365芯片的PCI总线控制卡,主要包括PCI接口芯片、单片机以及数据缓存单元;同时设计了基于数码管驱动芯片CH451的显示电路板,CH451并联应用,连接单片机控制信号,占用较少单片机引脚即可实现多路数据的显示。实验验证了基于PCI总线控制数码管现场显示的可行性。

The PCI local bus is an advanced and high performance 32/64 bit bus with multiplexed address and data lines,which is easy to realize I/O controlling card or communication interface card under high-speed and real-time. A PCI bus controlling card based on CH365 chip is designed in this article. The card mainly consists of PCI interface chip,MCU and data buffer. At the same time,display circuit based on driver chip CH451 is designed,the circuit connected control signal of MCU. It can realize data display with fewer pins as several CH451 chips are applied by parallel connected. The experiments proved that field display is feasible based on PCI bus controlling.