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    參數(shù)資料
    型號: MC8641HX1000NC
    廠商: FREESCALE SEMICONDUCTOR INC
    元件分類: 微控制器/微處理器
    英文描述: 32-BIT, 166.66 MHz, MICROPROCESSOR, CBGA1023
    封裝: 33 X 33 MM, CERAMIC, BGA-1023
    文件頁數(shù): 102/130頁
    文件大?。?/td> 1493K
    代理商: MC8641HX1000NC
    MPC8641 and MPC8641D Integrated Host Processor Hardware Specifications, Rev. 2
    Freescale Semiconductor
    73
    PCI Express
    14.4.2
    Transmitter Compliance Eye Diagrams
    The TX eye diagram in Figure 50 is specified using the passive compliance/test measurement load (see
    Figure 52) in place of any real PCI Express interconnect + RX component.
    There are two eye diagrams that must be met for the transmitter. Both eye diagrams must be aligned in
    time using the jitter median to locate the center of the eye diagram. The different eye diagrams will differ
    in voltage depending whether it is a transition bit or a de-emphasized bit. The exact reduced voltage level
    of the de-emphasized bit will always be relative to the transition bit.
    The eye diagram must be valid for any 250 consecutive UIs.
    A recovered TX UI is calculated over 3500 consecutive unit intervals of sample data. The eye diagram is
    created using all edges of the 250 consecutive UI in the center of the 3500 UI used for calculating the TX
    UI.
    NOTE
    It is recommended that the recovered TX UI is calculated using all edges in
    the 3500 consecutive UI interval with a fit algorithm using a minimization
    merit function (that is, least squares and median deviation fits).
    Figure 50. Minimum Transmitter Timing and Voltage Output Compliance Specifications
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