A51 MACRO ASSEMBLER  PC817                                                                06/14/2005 00:26:08 PAGE     1


MACRO ASSEMBLER A51 V6.12
OBJECT MODULE PLACED IN .\PC817.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE .\PC817.ASM SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

0000                   1     org 0000h
                       2     
0000                   3     LOOP:
                       4     
0000 D2B4              5     SETB P3.4  ;使P3.4輸出高,關閉光電耦合器PC817內部的LED發光觸發管
                       6     
0002 12001B            7     LCALL DELAY ;調用延時子程序DELAY
                       8     
0005 12001B            9     LCALL DELAY ;調用延時子程序DELA
                      10     
0008 12001B           11     LCALL DELAY ;調用延時子程序DELA
                      12     
000B C2B4             13     CLR P3.4 ;使P3.4輸出低,打開光電耦合器PC817內部的LED發光觸發管,此時PC817內部的輸出端燃