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    參數(shù)資料
    型號(hào): ATT3030-125J68I
    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)可編程門陣列
    文件頁(yè)數(shù): 26/80頁(yè)
    文件大小: 528K
    代理商: ATT3030-125J68I
    Data Sheet
    February 1997
    ATT3000 Series Field-Programmable Gate Arrays
    26
    Lucent Technologies Inc.
    Configuration Modes
    (continued)
    Daisy Chain
    The
    ORCA
    Foundry for ATT3000 Development System
    is used to create a composite configuration bit stream
    for selected FPGAs including a preamble, a length
    count for the total bit stream, multiple concatenated
    data programs, a postamble, plus an additional fill bit
    per device in the serial chain. After loading and passing
    on the preamble and length count to a possible daisy
    chain, a lead device will load its configuration data
    frames while providing a high DOUT to possible down-
    stream devices as shown in Figure 25. Loading contin-
    ues while the lead device has received its configuration
    program and the current length count has not reached
    the full value. Additional data is passed through the
    lead device and appears on the data out (DOUT) pin in
    serial form. The lead device also generates the CCLK
    to synchronize the serial output data and data in of
    downstream FPGAs. Data is read in on DIN of slave
    devices by the positive edge of CCLK and shifted out
    the DOUT on the negative edge of CCLK. A parallel
    master mode device uses its internal timing generator
    to produce an internal CCLK of eight times its EPROM
    address rate, while a peripheral mode device produces
    a burst of eight CCLKs for each chip select and write-
    strobe cycle. The internal timing generator continues to
    operate for general timing and synchronization of
    inputs in all modes.
    Figure 25. Master Mode with Daisy-Chained Slave Mode Devices
    5-3116(F)
    M0 M1PWRDWN
    FPGA
    MASTER
    +5 V
    HDC
    LDC
    OTHER
    I/O PINS
    RCLK
    GENERAL-
    PURPOSE
    USER I/O
    PINS
    5 k
    M2
    A15
    A14
    A13
    A12
    A11
    A10
    A9
    A8
    A7
    A6
    A5
    A4
    A3
    A2
    A1
    A0
    8
    A10
    A9
    A8
    A7
    A6
    A5
    A4
    A3
    A2
    A1
    A0
    EPROM
    OE
    CE
    D7
    D6
    D5
    D4
    D3
    D2
    D1
    D0
    D7
    D6
    D5
    D4
    D3
    D2
    D1
    D0
    D/P
    +5 V
    RESET
    REPROGRAM
    SYSTEM
    RESET
    OPEN COLLECTOR
    M0 M1PWRDWN
    +5 V
    5 k
    HDC
    LDC
    OTHER
    I/O PINS
    GENERAL-
    PURPOSE
    USER I/O
    M2
    INIT
    DIN
    CCLK
    D/P
    RESET
    DOUT
    M0 M1PWRDWN
    +5 V
    5 k
    HDC
    LDC
    OTHER
    I/O PINS
    GENERAL-
    PURPOSE
    USER I/O
    M2
    DIN
    CCLK
    D/P
    RESET
    DOUT
    FPGA
    SLAVE #1
    FPGA
    SLAVE #n
    5 k
    EACH
    +5 V
    INIT
    CCLK
    DOUT
    A15
    A14
    A13
    A12
    A11
    INIT
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