• 參數(shù)資料
    型號: MPC8548EVTAQGB
    廠商: Freescale Semiconductor
    文件頁數(shù): 102/151頁
    文件大?。?/td> 0K
    描述: IC MPU PWRQUICC III 783FCPBGA
    產(chǎn)品培訓模塊: MPC8548 PowerQUICC III Processors
    標準包裝: 1
    系列: MPC85xx
    處理器類型: 32-位 MPC85xx PowerQUICC III
    速度: 1.0GHz
    電壓: 1.1V
    安裝類型: 表面貼裝
    封裝/外殼: 783-BBGA,F(xiàn)CBGA
    供應商設備封裝: 783-FCPBGA(29x29)
    包裝: 托盤
    MPC8548E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 9
    54
    Freescale Semiconductor
    JTAG
    Figure 29 provides the AC test load for TDO and the boundary-scan outputs.
    Figure 29. AC Test Load for the JTAG Interface
    Figure 30 provides the JTAG clock input timing diagram.
    Figure 30. JTAG Clock Input Timing Diagram
    Valid times:
    Boundary-scan data
    TDO
    tJTKLDV
    tJTKLOV
    4
    2
    20
    10
    ns
    5
    Output hold times:
    Boundary-scan data
    TDO
    tJTKLDX
    tJTKLOX
    30
    ns
    5
    JTAG external clock to output high impedance:
    Boundary-scan data
    TDO
    tJTKLDZ
    tJTKLOZ
    3
    19
    9
    ns
    5, 6
    Notes:
    1. All outputs are measured from the midpoint voltage of the falling/rising edge of tTCLK to the midpoint of the signal in question.
    The output timings are measured at the pins. All output timings assume a purely resistive 50-
    load (see Figure 29).
    Time-of-flight delays must be added for trace lengths, vias, and connectors in the system.
    2. The symbols used for timing specifications 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, tJTDVKH symbolizes JTAG device
    timing (JT) with respect to the time data input signals (D) reaching the valid state (V) relative to the tJTG clock reference (K)
    going to the high (H) state or setup time. Also, tJTDXKH symbolizes JTAG timing (JT) with respect to the time data input signals
    (D) went invalid (X) relative to the tJTG clock reference (K) going to the high (H) state. Note that, in general, the clock reference
    symbol representation is based on three letters representing the clock of a particular functional. For rise and fall times, the
    latter convention is used with the appropriate letter: R (rise) or F (fall).
    3. TRST is an asynchronous level sensitive signal. The setup time is for test purposes only.
    4. Non-JTAG signal input timing with respect to tTCLK.
    5. Non-JTAG signal output timing with respect to tTCLK.
    6. Guaranteed by design.
    Table 44. JTAG AC Timing Specifications (Independent of SYSCLK)1 (continued)
    Parameter
    Symbol2
    Min
    Max
    Unit
    Notes
    Output
    Z0 = 50
    OVDD/2
    RL = 50
    JTAG
    tJTKHKL
    tJTGR
    External Clock
    VM
    tJTG
    tJTGF
    VM = Midpoint Voltage (OVDD/2)
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