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在单片机等微处理机系统的开发应用中,存储地址与指令/数据多用16进制代码来表示,这就经常需要16进制的显示器。然而,符合显示要求(0～9,A～F)的成品译码器几乎没有,用普通数字电路实现约需要6～7块芯片。由于PLD器件的编程开发已日臻成熟,仅采用一片16V 8A型GAL芯片即能完成上述功能。另外,由于GAL输出宏单元的低电平驱动电流可达到近30mA,故可以用来直接驱动普通的7段共阳级LED数码管,电路简洁,工作可靠并且还可以加密。
Microprocessor and other microcontroller systems in the development and application of storage addresses and instructions / data multi-purpose hexadecimal code to represent, which often requires a hexadecimal display. However, in line with the requirements of the display (0 ~ 9, A ~ F) of the finished decoder almost no ordinary digital circuit to achieve about 6 to 7 chips. As PLD device programming has matured, only using a 16V 8A GAL chip that can accomplish this. In addition, the GAL output macrocell low-level drive current up to nearly 30mA, it can be used to directly drive the ordinary 7-segment common-anode LED digital tube, the circuit is simple, reliable and can also be encrypted.