To improve the shorting of the traditional displacing neon lamp scanning controller, a general purpose programmable scanning controller for neon lamps is developed on the basis of 8031 single chip micro computer, EPROM 2732 and output latch. 针对传统移位式霓虹灯扫描控制器的缺点,研制出由8031单片机、EPROM2732程序存储器和输出锁存器(OL)等组成的通用型可编程霓虹灯扫描控制器。
On the basis of " input to buffer, output to latch ", The outer design can be isolated from BUS by means of using different isolator and using three states latching at the input port and data latching at the output port. 以输入缓冲,输出锁存为基本思路,采用不同的总线隔离器将外设与总线隔离,输入口用三态缓冲器,输出口用数据锁存器。
It consists of direction distinguishing circuit, up / down counting circuit, output buffer circuit, input latch circuit, decode and control circuit, F / V converting circuit. 它主要由方向判别电路、双脉冲加减计数电路、输出缓冲电路、预置锁存电路、译码控制电路、F/V转换电路等组成。