參數(shù)資料
      型號: MPC8572EVTAULB
      廠商: Freescale Semiconductor
      文件頁數(shù): 52/138頁
      文件大小: 0K
      描述: MPU POWERQUICC III 1023-PBGA
      標(biāo)準(zhǔn)包裝: 1
      系列: MPC85xx
      處理器類型: 32-位 MPC85xx PowerQUICC III
      速度: 1.333GHz
      電壓: 1.1V
      安裝類型: 表面貼裝
      封裝/外殼: 1023-BBGA,F(xiàn)CBGA
      供應(yīng)商設(shè)備封裝: 1023-FCPBGA(33x33)
      包裝: 托盤
      MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 5
      20
      Freescale Semiconductor
      DDR2 and DDR3 SDRAM Controller
      Table 12 provides the recommended operating conditions for the DDR SDRAM controller of the
      MPC8572E when interfacing to DDR3 SDRAM.
      Table 13 provides the DDR SDRAM controller interface capacitance for DDR2 and DDR3.
      Table 14 provides the current draw characteristics for MVREFn.
      6.2
      DDR2 and DDR3 SDRAM Interface AC Electrical Characteristics
      This section provides the AC electrical characteristics for the DDR SDRAM controller interface. The
      DDR controller supports both DDR2 and DDR3 memories. Note that although the minimum data rate for
      most off-the-shelf DDR3 DIMMs available is 800 MHz, JEDEC specification does allow the DDR3 to run
      at the data rate as low as 606 MHz. Unless otherwise specified, the AC timing specifications described in
      Table 12. DDR3 SDRAM Interface DC Electrical Characteristics for GVDD(typ) = 1.5 V
      Parameter/Condition
      Symbol
      Min
      Typical
      Max
      Unit
      I/O supply voltage
      GVDD
      1.425
      1.575
      V
      1
      I/O reference voltage
      MVREFn
      0.49
      × GVDD
      0.51
      × GVDD
      V2
      Input high voltage
      VIH
      MVREFn + 0.100
      GVDD
      V—
      Input low voltage
      VIL
      GND
      MVREFn – 0.100
      V
      Output leakage current
      IOZ
      –50
      50
      μA3
      Notes:
      1. GVDD is expected to be within 50 mV of the DRAM GVDD at all times.
      2. MVREFn is expected to be equal to 0.5 × GVDD, and to track GVDD DC variations as measured at the receiver.
      Peak-to-peak noise on MVREFn may not exceed ±1% of the DC value.
      3. Output leakage is measured with all outputs disabled, 0 V
      V
      OUT GVDD.
      Table 13. DDR2 and DDR3 SDRAM Interface Capacitance for GVDD(typ)=1.8 V and 1.5 V
      Parameter/Condition
      Symbol
      Min
      Typical
      Max
      Unit
      Input/output capacitance: DQ, DQS, DQS
      CIO
      6
      8
      pF
      1, 2
      Delta input/output capacitance: DQ, DQS, DQS
      CDIO
      0.5
      pF
      1, 2
      Note:
      1. This parameter is sampled. GVDD = 1.8 V ± 0.090 V (for DDR2), f = 1 MHz, TA = 25°C, VOUT =GVDD/2, VOUT
      (peak-to-peak) = 0.2 V.
      2. This parameter is sampled. GVDD = 1.5 V ± 0.075 V (for DDR3), f = 1 MHz, TA = 25°C, VOUT =GVDD/2, VOUT
      (peak-to-peak) = 0.175 V.
      Table 14. Current Draw Characteristics for MVREF n
      Parameter / Condition
      Symbol
      Min
      Max
      Unit
      Note
      Current draw for MVREFn
      DDR2 SDRAM
      IMVREFn
      1500
      μA1
      DDR3 SDRAM
      1250
      1. The voltage regulator for MVREFn must be able to supply up to 1500 μA or 1250 uA current for DDR2 or DDR3, respectively.
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