寄存器所储存的数据的数据经由数据选择器进入，在进由译码电路将原来的BCD码转换成七段显示器的显示码，之后传送到七段显示器。请注意，四个七段显示器是轮流点亮而非一起点亮，其显示扫描的速度必须和数据选择器器同步，因此需要一个计数器来提供两者的扫描信号。事实上，显示器扫描信号和键盘扫描信号两者对扫描信号的速度要求相近，所以可以共享一组扫描信号。-stored in the register of data through the data selector entry, Progressive by the decoding circuit of the original BCD converted into paragraph 107 of the display shows code sent to the following paragraph 107 display. Please note that in paragraph 107 of the four rotating lights display is not in lights, scan showed his speed and the need for data synchronization selector, Hence the need to provide a counter to both the scanning signal. Indeed, the display and keyboard scan signal scanning signal to both the scanning speed signal similar, So can share a scanning signal.