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  • 參數(shù)資料
    型號: GMS81C7208LQ
    廠商: Electronic Theatre Controls, Inc.
    元件分類: 8位微控制器
    英文描述: 8-BIT SINGLE-CHIP MICROCONTROLLERS
    中文描述: 8位單晶片微控制器
    文件頁數(shù): 63/93頁
    文件大?。?/td> 853K
    代理商: GMS81C7208LQ
    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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