參數(shù)資料
    型號(hào): ATT3042-125J44I
    廠商: Electronic Theatre Controls, Inc.
    元件分類: FPGA
    英文描述: Field-Programmable Gate Arrays
    中文描述: 現(xiàn)場(chǎng)可編程門(mén)陣列
    文件頁(yè)數(shù): 65/80頁(yè)
    文件大?。?/td> 528K
    代理商: ATT3042-125J44I
    Data Sheet
    February 1997
    ATT3000 Series Field-Programmable Gate Arrays
    Lucent Technologies Inc.
    65
    Electrical Characteristics
    (continued)
    Note: The requirements in this timing diagram are extremely relaxed; data need not be held beyond the rising edge of
    WS
    .
    BUSY
    will go active
    within 60 ns after the end of
    WS
    .
    BUSY
    will stay active for several microseconds.
    WS
    may be asserted immediately after the end of
    BUSY
    .
    Figure 38. Peripheral Mode Switching Characteristics
    Notes:
    At powerup, V
    CC
    must rise from 2.0 V to V
    CC
    minimum in less than 25 ms. If this is not possible, configuration can be delayed by holding
    RESET
    low until V
    CC
    has reached 4.0 V. A very long V
    CC
    rise time of >100 ms, or a nonmonotonically rising V
    CC
    may require a >1 μs high level on
    RESET
    , followed by >6 μs low level on
    RESET
    and D/
    P
    after V
    CC
    has reached 4.0 V.
    Configuration must be delayed until the
    INIT
    of all FPGAs is high.
    Time from end of
    WS
    to CCLK cycle for the new byte of data depends on completion of previous byte processing and the phase of the
    internal timing generator for CCLK.
    CCLK and DOUT timing is tested in slave mode.
    T
    BUSY
    indicates that the double-buffered parallel-to-serial converter is not yet ready to receive new data. The shortest T
    BUSY
    occurs when a
    byte is loaded into an empty parallel-to-serial converter. The longest T
    BUSY
    occurs when a new word is loaded into the input register before the
    second-level buffer has started shifting out data.
    Table 28. Peripheral Mode Switching Characteristics
    Signal
    Write Signal
    Description
    Symbol
    Min
    Max
    Unit
    Effective Write Time Required
    (Assertion of
    CS0
    ,
    CS1
    , CS2,
    WS
    )
    DIN Setup Time Required
    DIN Hold TIme Required
    RDY/
    BUSY
    Delay after End of
    WS
    Earliest Next
    WS
    after End of
    BUSY
    BUSY
    Low Time Generated
    1
    2
    3
    4
    5
    6
    T
    CA
    T
    DC
    T
    CD
    T
    WTRB
    T
    RBWT
    T
    BUSY
    100
    60
    0
    0
    2.5
    60
    9
    ns
    ns
    ns
    ns
    ns
    D[7:0]
    RDY/
    BUSY
    CCLK
    Periods
    5-3129(F)
    CS1/CS0
    CS2
    WS
    D[7:0]
    CCLK
    RDY/BUSY
    DOUT
    T
    CA
    T
    DC
    T
    CD
    VALID
    T
    RBWT
    T
    WTRB
    T
    BUSY
    GROUP OF
    8 CCLKs
    1
    4
    3
    6
    5
    2
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