• 參數(shù)資料
    型號: MC8641VU1250NC
    廠商: FREESCALE SEMICONDUCTOR INC
    元件分類: 微控制器/微處理器
    英文描述: MICROPROCESSOR, CBGA1023
    封裝: 33 X 33 MM, ROHS COMPLIANT, CERAMIC, BGA-1023
    文件頁數(shù): 69/140頁
    文件大?。?/td> 1484K
    代理商: MC8641VU1250NC
    MPC8641 and MPC8641D Integrated Host Processor Hardware Specifications, Rev. 0
    34
    Freescale Semiconductor
    Ethernet: Enhanced Three-Speed Ethernet (eTSEC), MII Management
    Figure 12 shows the GMII receive AC timing diagram.
    Figure 12. GMII Receive AC Timing Diagram
    8.2.3
    MII AC Timing Specifications
    This section describes the MII transmit and receive AC timing specifications.
    8.2.3.1
    MII Transmit AC Timing Specifications
    Table 30 provides the MII transmit AC timing specifications.
    Figure 13 shows the MII transmit AC timing diagram.
    Table 30. MII Transmit AC Timing Specifications
    At recommended operating conditions with L/TVDD of 3.3 V ± 5%.
    Parameter/Condition
    Symbol 1
    Min
    Typ
    Max
    Unit
    TX_CLK clock period 10 Mbps
    tMTX
    2
    400
    ns
    TX_CLK clock period 100 Mbps
    tMTX
    —40
    ns
    TX_CLK duty cycle
    tMTXH/tMTX
    35
    65
    %
    TX_CLK to MII data TXD[3:0], TX_ER, TX_EN delay
    tMTKHDX
    1
    5
    15
    ns
    TX_CLK data clock rise time (20%-80%)
    tMTXR
    2
    1.0
    4.0
    ns
    TX_CLK data clock fall time (80%-20%)
    tMTXF
    2
    1.0
    4.0
    ns
    Note:
    1. The symbols used for timing specifications herein follow the pattern of t(first two letters of functional block)(signal)(state) (reference)(state)
    for inputs and t(first two letters of functional block)(reference)(state)(signal)(state) for outputs. For example, tMTKHDX symbolizes MII
    transmit timing (MT) for the time tMTX clock reference (K) going high (H) until data outputs (D) are invalid (X). Note that, in
    general, the clock reference symbol representation is based on two to three letters representing the clock of a particular
    functional. For example, the subscript of tMTX represents the MII(M) transmit (TX) clock. For rise and fall times, the latter
    convention is used with the appropriate letter: R (rise) or F (fall).
    2. Guaranteed by design.
    RX_CLK
    RXD[7:0]
    tGRDXKH
    tGRX
    tGRXH
    tGRXR
    tGRXF
    tGRDVKH
    RX_DV
    RX_ER
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