參數(shù)資料
    型號: MSC1211Y4PAGTG4
    廠商: TEXAS INSTRUMENTS INC
    元件分類: 微控制器/微處理器
    英文描述: 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP64
    封裝: GREEN, PLASTIC, TQFP-64
    文件頁數(shù): 2/111頁
    文件大小: 1102K
    代理商: MSC1211Y4PAGTG4
    MSC1211, MSC1212
    MSC1213,MSC1214
    SBAS323G JUNE 2004 REVISED OCTOBER 2007
    www.ti.com
    10
    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 designators 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:
    (1) tAVLL = Time for address valid to ALE Low.
    (2) tLLPL = Time for ALE Low to PSEN Low.
    t
    LHLL
    t
    AVLL
    t
    LLPL
    t
    PLPH
    t
    LLIV
    t
    LLAX
    t
    PLAZ
    t
    PXIZ
    t
    PXIX
    t
    AVIV
    t
    PLIV
    A0A7
    A8A15
    INSTR IN
    ALE
    PSEN
    PORT 0
    PORT 2
    Figure 1. External Program Memory Read Cycle
    t
    AVLL
    ALE
    RD
    PSEN
    PORT 0
    PORT 2
    A0A7
    from RI or DPL
    DATA IN
    A0A7 from PCL
    INSTR IN
    P2.0P2.7 or A8A15 from DPH
    A8A15 from PCH
    t
    AVDV
    t
    LLDV
    t
    WHLH
    t
    RLRH
    t
    LLWL
    t
    LLAX
    t
    RLAZ
    t
    RHDX
    t
    RLDV
    t
    AVWL
    t
    RHDZ
    Figure 2. External Data Memory Read Cycle
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