use STC89C52 produced a calendar, document contains drawings (Cadence- Allegro), and the entire PCB schematic source files, The tests can be used, hope for the program is to help beginners.

Packet : 117143199stc89c52_sys_time_ok.rar filelist
stc89c52_sys_time_ok\TIMER.C
stc89c52_sys_time_ok\WORKSPACE.C
stc89c52_sys_time_ok\MAIN.C
stc89c52_sys_time_ok\MAIN.H
stc89c52_sys_time_ok\SCANKEY.C
stc89c52_sys_time_ok\SCANLED.C
stc89c52_sys_time_ok\STC89C52.DSN
stc89c52_sys_time_ok\PCB示意图.bmp
stc89c52_sys_time_ok\说明.txt
stc89c52_sys_time_ok

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