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七段LED数码管以及与此有关的译码/驱动器主要用来显示数字0至9。但图1中的电路已扩展成能用数字来显示所选择的字母和符号(图2)。即通过不同的二极管矩阵排列,将字符读出。一般,用二进制码输入0000至1111有16种字符可供选择。如果16个代码全部用上,则可代表10个数字和6个常用标记符,这种用法较为常见。另一种用法是将16个代码作为PROM或者译码器中的十六进制数显示。
Seven-segment LED digital tube and its associated decoders / drivers are mainly used to display numbers 0 to 9. However, the circuit in Figure 1 has been expanded to display the selected letters and symbols numerically (Figure 2). That is through a different arrangement of the diode matrix, the characters read out. In general, there are 16 characters to choose from 0000 to 1111 as binary code. If all 16 codes are used, it can represent 10 numbers and 6 commonly used tags. This usage is more common. Another usage is to display 16 codes as hexadecimal numbers in the PROM or decoder.