RET
;数据表~~~~~~~~~~~~~~~~~~~`~~ TAB: DB
35,15H,51H,00H,23,11H,52H,41H,42,12H,65H,00H DB
31,11H,32H,00H,21,42H,52H,21H,39,52H,25H,00H DB
28,25H,04H,71H,48,66H,42H,00H,37,33H,22H,00H DB
25,15H,24H,51H,44,05H,52H,00H,33,22H,65H,00H DB
22,21H,25H,41H,40,24H,52H,00H,30,52H,42H,91H DB
49,55H,05H,00H,38,26H,44H,00H,27,53H,50H,60H DB
46,53H,24H,00H,35,25H,54H,00H,24,41H,52H,41H DB
42,45H,25H,00H,31,24H,52H,00H,21,51H,12H,21H DB
40,55H,11H,00H,28,26H,21H,61H,47,26H,61H,00H DB
36,13H,31H,00H,25,05H,31H,51H,43,12H,54H,00H DB
33,51H,25H,00H,22,42H,25H,31H,41,32H,22H,00H DB
30,55H,02H,71H,49,55H,22H,00H,38,26H,62H,00H DB
27,13H,64H,60H,45,13H,32H,00H,34,12H,55H,00H DB
23,10H,53H,51H,42,22H,45H,00H,31,52H,22H,00H DB
21,52H,44H,21H,40,55H,44H,00H,29,26H,50H,71H DB
47,26H,64H,00H,36,25H,32H,00H,25,2
3H,32H,50H DB
44,44H,55H,00H,32,24H,45H,00H,22,5
5H,11H,30H END
附录三：系统使用说明书
如电路原理总图可知，本电路具有年、月、日、周日、时、分、秒、温度和农历功能，
总共由21个LED数码管显示，如下图-a所示。
图－a
日期和时间的修改由3个按键构成。如图-b所示。键１为向右移；键２为加１；键３为减１。
图－b