• <pre id="u94ty"></pre>
    參數(shù)資料
    型號: MPC8555ECPXAPEX
    廠商: FREESCALE SEMICONDUCTOR INC
    元件分類: 微控制器/微處理器
    英文描述: 32-BIT, 833 MHz, RISC PROCESSOR, PBGA783
    封裝: 29 X 29 MM, 3.75 MM HEIGHT, 1 MM PITCH, FLIP CHIP, PLASTIC, BGA-783
    文件頁數(shù): 3/88頁
    文件大?。?/td> 1244K
    代理商: MPC8555ECPXAPEX
    MPC8555E PowerQUICC III Integrated Communications Processor Hardware Specifications, Rev. 4
    Freescale Semiconductor
    11
    Electrical Characteristics
    Figure 2 shows the undershoot and overshoot voltages at the interfaces of the MPC8555E.
    Figure 2. Overshoot/Undershoot Voltage for GVDD/OVDD/LVDD
    The MPC8555E core voltage must always be provided at nominal 1.2 V (see Table 2 for actual
    recommended core voltage). Voltage to the processor interface I/Os are provided through separate sets of
    supply pins and must be provided at the voltages shown in Table 2. The input voltage threshold scales with
    respect to the associated I/O supply voltage. OVDD and LVDD based receivers are simple CMOS I/O
    circuits and satisfy appropriate LVCMOS type specifications. The DDR SDRAM interface uses a
    single-ended differential receiver referenced the externally supplied MVREF signal (nominally set to
    GVDD/2) as is appropriate for the SSTL2 electrical signaling standard.
    Input voltage
    DDR DRAM signals
    MVIN
    GND to GVDD
    V
    DDR DRAM reference
    MVREF
    GND to GVDD
    V
    Three-speed Ethernet signals
    LVIN
    GND to LVDD
    V
    PCI, local bus, DUART,
    SYSCLK, system control and
    power management, I2C, and
    JTAG signals
    OVIN
    GND to OVDD
    V
    Die-junction Temperature
    Tj
    0 to 105
    °C
    Table 2. Recommended Operating Conditions (continued)
    Characteristic
    Symbol
    Recommended Value
    Unit
    GND
    GND – 0.3 V
    GND – 0.7 V
    Not to Exceed 10%
    G/L/OVDD + 20%
    G/L/OVDD
    G/L/OVDD + 5%
    of tSYS
    1
    1. Note that tSYS refers to the clock period associated with the SYSCLK signal.
    VIH
    VIL
    Note:
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