CH452的资料和例程,主要是用在单片机系统里的LED显示和键盘驱动,很好用而且低价格的国产芯片(希望大家多支持国产IC)-CH452 information and routines, it is mainly used in the SCM system that the LED display and keyboard-driven, good use and the low price of China-made chips (I hope everyone supports domes