单时钟完成多点分别计时的实现和应用

nbsp;       LCALL     OUT01
                        MOV       51H,#00H
                        LJMP      DE3  
 DEAL3:                JNB       2CH.2,DE4
                 INC       52H
                        MOV       A,52H
                        CJNE      A,#20,DE4
                        CLR       2CH.2
                        LCALL     OUT01
                        MOV       52H,#00H
                        LJMP      DE4
DEAL4:                JNB       2CH.3,DE5I
                INC       53H
                        MOV       A,53H
                        CJNE

《单时钟完成多点分别计时的实现和应用(第6页)》