參數(shù)資料
型號: GMS81C2020LQ
廠商: HYNIX SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: IC MCU 8-BIT ROMLESS 44-PQFP
中文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
封裝: LQFP-64
文件頁數(shù): 63/93頁
文件大小: 853K
代理商: GMS81C2020LQ
GMS81C1404/GMS81C1408
June. 2001 Ver 1.2
61
Figure 17-5 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,#0FFH
IENL,#0F0H
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.
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