參數(shù)資料
          型號: MPC8314EVRAGDA
          廠商: FREESCALE SEMICONDUCTOR INC
          元件分類: 微控制器/微處理器
          英文描述: MICROPROCESSOR, PBGA620
          封裝: 29 X 29 MM, LEAD FREE, PLASTIC, TEPBGA-620
          文件頁數(shù): 17/106頁
          文件大?。?/td> 1253K
          代理商: MPC8314EVRAGDA
          MPC8314E PowerQUICC II Pro Processor Hardware Specifications, Rev. 0
          18
          Freescale Semiconductor
          DDR and DDR2 SDRAM
          Table 14 provides the DDR capacitance when GVDD(typ) = 2.5 V.
          Table 15 provides the current draw characteristics for MVREF.
          7.2
          DDR and DDR2 SDRAM AC Electrical Characteristics
          This section provides the AC electrical characteristics for the DDR and DDR2 SDRAM interface.
          7.2.1
          DDR and DDR2 SDRAM Input AC Timing Specifications
          Table 16 lists the input AC timing specifications for the DDR2 SDRAM (GVDD(typ) = 1.8 V).
          Table 17 lists the input AC timing specifications for the DDR SDRAM when GVDD(typ)=2.5 V.
          Table 14. DDR SDRAM Capacitance for GVDD(typ) = 2.5 V Interface
          Parameter/Condition
          Symbol
          Min
          Max
          Unit
          Notes
          Input/output capacitance: DQ,DQS
          CIO
          68
          pF
          1
          Delta input/output capacitance: DQ, DQS
          CDIO
          —0.5
          pF
          1
          Note:
          1. This parameter is sampled. GVDD = 2.5 V ± 0.125 V, f = 1 MHz, TA =25°C, VOUT = GVDD/2, VOUT (peak-to-peak) = 0.2 V.
          Table 15. Current Draw Characteristics for MVREF
          Parameter / Condition
          Symbol
          Min
          Max
          Unit
          Note
          Current draw for MVREF
          IMVREF
          500
          μA1
          Note:
          1. The voltage regulator for MVREF must be able to supply up to 500 μA current.
          Table 16. DDR2 SDRAM Input AC Timing Specifications for 1.8-V Interface
          At recommended operating conditions with GVDD of 1.8V ± 100 mV
          Parameter
          Symbol
          Min
          Max
          Unit
          Notes
          AC input low voltage
          VIL
          MVREF – 0.45
          V
          AC input high voltage
          VIH
          MVREF + 0.45
          V
          Table 17. DDR SDRAM Input AC Timing Specifications for 2.5 V Interface
          At recommended operating conditions with GVDD of 2.5V ± 200 mV
          Parameter
          Symbol
          Min
          Max
          Unit
          Notes
          AC input low voltage
          VIL
          MVREF – 0.51
          V
          AC input high voltage
          VIH
          MVREF + 0.51
          V
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