EM78P259N 管脚唤醒功能的应用

管脚唤醒功能的应用
义隆电子股份有限公司
第一版
2008年11月
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EM78P259N
管脚唤醒功能的应用
目录
一、相关寄存器 (2)
1、RF（中断状态寄存器1） (2)
二、使用步骤 (2)
三、范例 (2)
EM78P259N
管脚唤醒功能的应用
EM78P259N管脚唤醒功能的应用
一、 相关寄存器
1、RF（中断状态寄存器1）
- - ADIF CMPIF ADWE CMPWE ICWE TCIF Bit 1(ICWE)：Port5 输入状态改变唤醒控制使能位
0：禁止Port5输入状态改变唤醒
1：使能Port5输入状态改变唤醒
二、 使用步骤
1.PORT5唤醒口设为输入；
2.可以根据需要选择PORT5唤醒口的内部上拉或下拉；
3.读取PORT5(MOV 0X05,0X05)；
4.设置寄存器RE的ICWE位为“1”，使能唤醒功能；
5.执行“SLEP”指令。

三、 范例
;************************************************
;以下程式实现的是在I/O口唤醒后P67驱动点亮LED
;************************************************
;MCU：EM78P259N
;Oscillator：crystal4MHz
;Clock：2
;WDT：Enable
;编译软件：WicePlus Version 2.6081015
INCLUDE "EM78P259N.INC"
ORG 0X00
JMP INITIAL
ORG 0X50
EM78P259N
管脚唤醒功能的应用
INITIAL:
IOR IOCE0
AND A,@0B01111111
IOW IOCE0 ;禁止WDT
MOV A,@0XFF
IOW IOC50 ;设定PORT5为输入口
MOV A,@0X00
MOV PORT6,A
IOW IOC60 ;设定PORT6为输出，初始值为低电平
MOV A,@0X00
IOW IOCD0 ;使能PORT5上拉功能
MOV A,@0x02
MOV RE,A ;使能PORT5状态改变唤醒功能
MOV PORT5,PORT5 ;读取PORT5
DISI ;禁止所有中断
SLEP ;进入睡眠模式
NOP
NOP
NOP
MOV A,@0X80
MOV PORT6,A ;点亮PORT67
JMP $。