A51 MACRO ASSEMBLER  74HC165                                                              02/04/2004 17:10:39 PAGE     1


MACRO ASSEMBLER A51 V7.08a
OBJECT MODULE PLACED IN 74hc165.OBJ
ASSEMBLER INVOKED BY: C:\KEIL\C51\BIN\A51.EXE 74hc165.asm SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

  0090                 1             PL      EQU     P1.0
  0091                 2             CLK1    EQU     P1.1
  0092                 3             CLK2    EQU     P1.2
  0093                 4             SER     EQU     P1.3
  0095                 5             Q7      EQU     P1.5
                       6     
8000                   7             ORG     8000H
8000 028100            8             LJMP    MAIN
8100                   9             ORG     8100H
                      10     
8100 758160           11     MAIN:   MOV     SP,#60H         ;設置堆棧
8103 7C00             12             MOV     R4,#00          ;延時
8105 DCFE             13             DJNZ    R4,$    
8107 7400             14             MOV     A,#0            ;變量清零
8109 D295             15             SETB    Q7              ;Q=1,端口設為輸入狀態(tài)
810B C293             16             CLR     SER             ;SER=0
810D C292             17             CLR     CLK2            ;CLK2=0
810F C290             18             CLR     PL              ;/PL=0
8111 00               19             NOP                     ;鎖存并行輸入示