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    參數(shù)資料
    型號: P83C453EBAA
    廠商: NXP SEMICONDUCTORS
    元件分類: 微控制器/微處理器
    英文描述: 80C51 8-bit microcontroller family 8K/256 OTP/ROM, expanded I/O
    中文描述: 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQCC68
    封裝: PLASTIC, SOT-168-3, MO-047AE, LCC-68
    文件頁數(shù): 17/26頁
    文件大?。?/td> 188K
    代理商: P83C453EBAA
    Philips Semiconductors
    Preliminary specification
    83C453/87C453
    80C51 8-bit microcontroller family
    8K/256 OTP/ROM, expanded I/O
    1998 Apr 23
    17
    EXPLANATION OF THE AC SYMBOLS
    Each timing symbol has five characters. The first character is always
    ‘t’ (= time). The other characters, depending on their positions,
    indicate the name of a signal or the logical status of that signal.
    The designations are:
    A – Address
    C – Clock
    D – Input data
    H – Logic level high
    I
    – Instruction (program memory contents)
    L – Logic level low, or ALE
    P – PSEN
    Q – Output data
    R – RD signal
    t
    – Time
    V – Valid
    W – WR signal
    X – No longer a valid logic level
    Z – Float
    Examples:
    t
    AVLL
    = Time for address valid to ALE low.
    t
    LLPL
    = Time for ALE low to PSEN low.
    t
    PXIZ
    ALE
    PSEN
    PORT 0
    PORT 2
    A0–A15
    A8–A15
    A0–A7
    A0–A7
    t
    AVLL
    t
    PXIX
    t
    LLAX
    INSTR IN
    t
    PLIV
    t
    LHLL
    t
    PLPH
    t
    LLIV
    t
    PLAZ
    t
    LLPL
    t
    AVIV
    SU00056
    Figure 9. External Program Memory Read Cycle
    t
    LLAX
    ALE
    PSEN
    PORT 0
    PORT 2
    RD
    A0–A7
    FROM RI OR DPL
    DATA IN
    A0–A7 FROM PCL
    INSTR IN
    P2.0–P2.7 OR A8–A15 FROM DPH
    A0–A15 FROM PCH
    t
    WHLH
    t
    LLDV
    t
    LLWL
    t
    RLRH
    t
    RLAZ
    t
    AVLL
    t
    RHDX
    t
    RHDZ
    t
    AVWL
    t
    AVDV
    t
    RLDV
    SU00007
    Figure 10. External Data Memory Read Cycle
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