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    參數(shù)資料
    型號: MPC8545CPXANGB
    廠商: FREESCALE SEMICONDUCTOR INC
    元件分類: 微控制器/微處理器
    英文描述: 32-BIT, 800 MHz, MICROPROCESSOR, PBGA783
    封裝: 29 X 29 MM, 1 MM PITCH, FLIP CHIP, PLASTIC, BGA-783
    文件頁數(shù): 73/142頁
    文件大?。?/td> 1504K
    代理商: MPC8545CPXANGB
    MPC8548E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 5
    36
    Freescale Semiconductor
    Enhanced Three-Speed Ethernet (eTSEC)
    A timing diagram for TBI receive appears in Figure 16.
    .
    Figure 16. TBI Single-Clock Mode Receive AC Timing Diagram
    8.2.6
    RGMII and RTBI AC Timing Specifications
    Table 33 presents the RGMII and RTBI AC timing specifications.
    Table 33. RGMII and RTBI AC Timing Specifications
    Parameter/Condition
    Symbol1
    Min
    Typ
    Max
    Unit
    Data to clock output skew (at transmitter)
    tSKRGT
    5
    –5006
    0
    5006
    ps
    Data to clock input skew (at receiver) 2
    tSKRGT
    1.0
    2.8
    ns
    Clock period 3
    tRGT
    5
    7.2
    8.0
    8.8
    ns
    Duty cycle for 10BASE-T and 100BASE-TX3, 4
    tRGTH/tRGT
    5
    45
    50
    55
    %
    Rise time (20%–80%)
    tRGTR
    5
    0.75
    ns
    Fall time (20%–80%)
    tRGTF
    5
    0.75
    ns
    Notes:
    1. In general, the clock reference symbol representation for this section is based on the symbols RGT to represent RGMII and
    RTBI timing. For example, the subscript of tRGT represents the TBI (T) receive (RX) clock. Note also that the notation for rise
    (R) and fall (F) times follows the clock symbol that is being represented. For symbols representing skews, the subscript is
    skew (SK) followed by the clock that is being skewed (RGT).
    2. This implies that PC board design will require clocks to be routed such that an additional trace delay of greater than 1.5 ns
    will be added to the associated clock signal.
    3. For 10 and 100 Mbps, tRGT scales to 400 ns ± 40 ns and 40 ns ± 4 ns, respectively.
    4. Duty cycle may be stretched/shrunk during speed changes or while transitioning to a received packet's clock domains as long
    as the minimum duty cycle is not violated and stretching occurs for no more than three tRGT of the lowest speed transitioned
    between.
    5. Guaranteed by characterization.
    6. In rev 1.0 silicon, due to errata, tSKRGT is -650 ps (min) and 650 ps (max). Please refer to “eTSEC 10” in the device errata
    document.
    tTRRX
    tTRRH
    tTRRF
    tTRRR
    RX_CLK
    RCG[9:0]
    Valid Data
    tTRRDXKH
    tTRRDVKH
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