參數(shù)資料
        型號(hào): GMS90C51
        英文描述: 8-Bit CMOS Microcontrollers(高性價(jià)比的51單片機(jī),片內(nèi)4KROM,128字節(jié)RAM,工作電壓5V)
        中文描述: 8位CMOS微控制器(高性價(jià)比的51單片機(jī),片內(nèi)4KROM,128字節(jié)的RAM,工作電壓5V的)
        文件頁數(shù): 43/59頁
        文件大小: 812K
        代理商: GMS90C51
        AC Characteristics for GMS90series (40MHz version)
        External Data Memory Characteristics
        Parameter
        Symbol
        Limit Values
        Unit
        40 MHz
        Clock
        Variable Clock
        1/
        t
        CLCL
        = 3.5 MHz to 40 MHz
        min.
        max.
        min.
        max.
        RD pulse width
        t
        RLRH
        120
        -
        6
        t
        CLCL
        - 30
        -
        ns
        WR pulse width
        t
        WLWH
        120
        -
        6
        t
        CLCL
        - 30
        -
        ns
        Address hold after ALE
        t
        LLAX2
        10
        -
        t
        CLCL
        - 15
        -
        ns
        RD to valid data in
        t
        RLDV
        -
        75
        -
        5
        t
        CLCL
        - 50
        ns
        Data hold after RD
        t
        RHDX
        0
        -
        0
        -
        ns
        Data float after RD
        t
        RHDZ
        -
        38
        -
        2
        t
        CLCL
        - 12
        ns
        ALE to valid data in
        t
        LLDV
        -
        150
        -
        8
        t
        CLCL
        - 50
        ns
        Address to valid data in
        t
        AVDV
        -
        150
        -
        9
        t
        CLCL
        - 75
        ns
        ALE to WR or RD
        t
        LLWL
        60
        90
        3
        t
        CLCL
        - 15
        3
        t
        CLCL
        + 15
        ns
        Address valid to WR or RD
        t
        AVWL
        70
        -
        4
        t
        CLCL
        - 30
        -
        ns
        WR or RD high to ALE high
        t
        WHLH
        10
        40
        t
        CLCL
        - 15
        t
        CLCL
        + 15
        ns
        Data valid to WR transition
        t
        QVWX
        5
        -
        t
        CLCL
        - 20
        -
        ns
        Data setup before WR
        t
        QVWH
        125
        -
        7
        t
        CLCL
        - 50
        -
        ns
        Data hold after WR
        t
        WHQX
        5
        -
        t
        CLCL
        - 20
        -
        ns
        Address float after RD
        t
        RLAZ
        -
        0
        -
        0
        ns
        8-Bit CMOS Microcontroller
        GMS90 Series
        MAY. 1998
        43
        LG Semicon MCU
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