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    參數(shù)資料
    型號: XC5202-4TQ144C
    廠商: XILINX INC
    元件分類: FPGA
    英文描述: Field Programmable Gate Arrays
    中文描述: FPGA, 64 CLBS, 2000 GATES, 83 MHz, PQFP144
    封裝: PLASTIC, TQFP-144
    文件頁數(shù): 36/73頁
    文件大?。?/td> 598K
    代理商: XC5202-4TQ144C
    R
    XC5200 Series Field Programmable Gate Arrays
    7-118
    November 5, 1998 (Version 5.2)
    Synchronous Peripheral Mode
    Synchronous Peripheral mode can also be considered
    Slave Parallel mode. An external signal drives the CCLK
    input(s) of the FPGA(s). The first byte of parallel configura-
    tion data must be available at the Data inputs of the lead
    FPGA a short setup time before the rising CCLK edge.
    Subsequent data bytes are clocked in on every eighth con-
    secutive rising CCLK edge.
    The same CCLK edge that accepts data, also causes the
    RDY/BUSY output to go High for one CCLK period. The pin
    name is a misnomer. In Synchronous Peripheral mode it is
    really an ACKNOWLEDGE signal. Synchronous operation
    does not require this response, but it is a meaningful signal
    for test purposes. Note that RDY/BUSY is pulled High with
    a high-impedance pullup prior to INIT going High.
    The lead FPGA serializes the data and presents the pre-
    amble data (and all data that overflows the lead device) on
    its DOUT pin. There is an internal delay of 1.5 CCLK peri-
    ods, which means that DOUT changes on the falling CCLK
    edge, and the next FPGA in the daisy chain accepts data
    on the subsequent rising CCLK edge.
    In order to complete the serial shift operation, 10 additional
    CCLK rising edges are required after the last data byte has
    been loaded, plus one more CCLK cycle for each
    daisy-chained device.
    Synchronous Peripheral mode is selected by a <011> on
    the mode pins (M2, M1, M0).
    X9005
    CONTROL
    SIGNALS
    DATA BUS
    PROGRAM
    DOUT
    M0 M1
    CCLK
    M2
    D
    0-7
    INIT
    DONE
    PROGRAM
    4.7 k
    3.3 k
    3.3 k
    RDY/BUSY
    V
    CC
    OPTIONAL
    DAISY-CHAINED
    FPGAs
    NOTE:
    M2 can be shorted to Ground
    if not used as I/O
    CLOCK
    PROGRAM
    DOUT
    XC5200E/EX
    SLAVE
    M0 M1
    CCLK
    N/C
    8
    M2
    DIN
    INIT
    DONE
    N/C
    XC5200
    SYNCHRO-
    NOUS
    PERIPHERAL
    Figure 33: Synchronous Peripheral Mode Circuit Diagram
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