key.lst

采用中断方式的４＊４扫描矩阵式键盘

A51 MACRO ASSEMBLER  KEY                                                                  09/27/2008 09:49:59 PAGE     1


MACRO ASSEMBLER A51 V6.12
NO OBJECT MODULE REQUESTED
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE .\key.asm SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

0000 7590F0            1     KEY:   MOV    P1,#0F0H   ;行线置低电平,列线置输入态
0003 E590              2     KEY0:  MOV    A,P1       ;读列线示