參數(shù)資料
型號: HMS87C1304A
廠商: Hynix Semiconductor Inc.
英文描述: CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
中文描述: CMOS單芯片8位微控制器
文件頁數(shù): 53/70頁
文件大小: 977K
代理商: HMS87C1304A
HYUNDAI MicroElectronics
HMS87C1304A/HMS87C1302A
Jan. 2001
Preliminary
53
Figure 15-5 Execution of Multi Interrupt
Example: Even though Timer1 interrupt is in progress,
INT0 interrupt serviced without any suspend.
TIMER1: PUSH
A
X
Y
IENH,#80H
IENL,#0
PUSH
PUSH
LDM
LDM
EI
:
:
:
;
Enable INT0 only
;
Disable other
;
Enable Interrupt
:
:
:
LDM
LDM
POP
POP
POP
RETI
IENH,#0F0H
IENL,#0E0H
Y
X
A
;
Enable all interrupts
enable INT0
disable other
TIMER 1
service
INT0
service
Main Program
service
Occur
TIMER1 interrupt
Occur
INT0
EI
enable INT0
enable other
In this example, the INT0 interrupt can be serviced without any
pending, even TIMER1 is in progress.
Because of re-setting the interrupt enable registers IENH,IENL
and master enable “EI” in the TIMER1 routine.
Preimnary
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