1. 键盘键输入并在LCD(1602)上显示键盘键号的程序。

2. 按键具有加1和减1功能的功能键的监控程序，并在LCD上显示数值的变化。左边四位　　　　或二位显示外部存储器或内部存储器地址，右边二位显示存储器中内容。

-1. The keyboard keys to enter and LCD (1602) No keyboard keys displayed on the program. 2. Keys plus 1 and minus 1 with the function key function of monitoring procedures and values ​ ​ in the LCD display changes. Four or two shows left external memory or internal memory address, the right two display memory contents.