• 參數(shù)資料
    型號: EP20K100RC240-1
    英文描述: 8-Bit Video Analog Front End (AFE) with Measurement and Auto-Adjust Features; Temperature Range: 0&degC to 70°C; Package: 80-EPTQFP
    中文描述: 現(xiàn)場可編程門陣列(FPGA)
    文件頁數(shù): 41/114頁
    文件大?。?/td> 1623K
    代理商: EP20K100RC240-1
    32
    Altera Corporation
    APEX 20K Programmable Logic Device Family Data Sheet
    Read/Write Clock Mode
    The read/write clock mode contains two clocks. One clock controls all
    registers associated with writing: data input, WE, and write address. The
    other clock controls all registers associated with reading: read enable
    (RE), read address, and data output. The ESB also supports clock enable
    and asynchronous clear signals; these signals also control the read and
    write registers independently. Read/write clock mode is commonly used
    for applications where reads and writes occur at different system
    frequencies. Figure 20 shows the ESB in read/write clock mode.
    Figure 20. ESB in Read/Write Clock Mode
    Notes:
    (1)
    All registers can be cleared asynchronously by ESB local interconnect signals, global signals, or the chip-wide reset.
    (2)
    APEX 20KE devices have four dedicated clocks.
    Dedicated Clocks
    2 or 4
    4
    D
    ENA
    Q
    D
    ENA
    Q
    D
    ENA
    Q
    D
    ENA
    Q
    D
    ENA
    Q
    data[ ]
    rdaddress[ ]
    wraddress[ ]
    RAM/ROM
    128
    × 16
    256
    × 8
    512
    × 4
    1,024
    × 2
    2,048
    × 1
    Data In
    Read Address
    Write Address
    Read Enable
    Write Enable
    Data Out
    outclken
    inclken
    inclock
    outclock
    D
    ENA
    Q
    Write
    Pulse
    Generator
    rden
    wren
    Dedicated Inputs &
    Global Signals
    to MegaLAB,
    FastTrack &
    Local
    Interconnect
    (2)
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