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    參數資料
    型號: 935242220557
    廠商: NXP SEMICONDUCTORS
    元件分類: 消費家電
    英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP208
    封裝: PLASTIC, SOT-316, SQFP-208
    文件頁數: 102/148頁
    文件大?。?/td> 692K
    代理商: 935242220557
    1998 Apr 09
    57
    Philips Semiconductors
    Product specication
    Multimedia bridge, high performance
    Scaler and PCI circuit (SPCI)
    SAA7146A
    7.8.2
    DD1: DUAL D1 (CCIR 656, SMPTE125M), I/O
    7.8.2.1
    Cb-Y-Cr-Y 8-bit wide stream
    In this mode two video ports with YUV 4 :2:2 sampling scheme are available. Each D1 port has an I/O capability and
    has a separate clock input and separate sync lines. In this format the pixel rate is equivalent to the clock rate LLC.
    The colour difference signal sample and luminance signal sample (straight binary) are byte-wise multiplexed into the
    same 8-bit wide data stream, with sequence and timing in accordance with CCIR 656 recommendation (respectively
    according to D1 for 60 Hz application). The incoming and scaled data are reformatted to 16-bit for the HPS data path and
    the corresponding reference signals are generated. A discontinuous data stream is supported by accepting or generating
    a pixel/byte qualifying signal (PXQ = 1: qualified pixel, PXQ = 0: invalid data, see Fig.9). The start condition for
    synchronizing to the correct Cb-Y-Cr-Y sequence is given by the selected horizontal reference signal. The sequence
    increments only with qualified bytes.
    Fig.9 Timing of PXQ_x for serial 8-bit data input at the D1_x port.
    handbook, full pagewidth
    D1_x (7 to 0)
    MHB050
    PXQ_x
    HS_x
    LLC_x
    Cr
    Y
    Cb
    Y
    Cb
    Y
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