键盘接口芯片，嵌入式开发专用键盘芯片，好东西-keyboard interface chip, embedded chip developed special keyboard, good things

看门狗芯片x25045,带4kEEPROM，这里提供c源程序，以供参考。-watchdog chip x25045, with 4kEEPROM, c source provided here, for reference.

T9测试输入法测试,包括有拼音和笔画两种,通过对源码的了解,可以方便的移植到单片机系统中.-T9 Test input method testing, including two and pinyin, through the understanding of the source code, can be transplanted into the single chip microcomputer system.

51 single-chip LED flashes