| 2. | A typical calculator chip from rcl semiconductor inc , c9821 , is referenced and developed . the chip of the calculator consists of several function units such as rc oscillator , power management module , microprogrammed control unit ( mcu ) , register group , lcd driver and keyboard interface
在硬件方面，在完成计算器的功能模块划分的基础上，对包括rc振荡器、电源模块、 lcd显示驱动模块、键盘接口、寄存器组、微程序控制器在内的各个功能模块的系统结构和电路原理进行了分析，掌握了它们的设计方法。 |
