參數(shù)資料
型號: MPC8572EPXARNB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 1067 MHz, MICROPROCESSOR, PBGA1023
封裝: 33 X 33 MM, PLASTIC, FCBGA-1023
文件頁數(shù): 53/138頁
文件大?。?/td> 1502K
代理商: MPC8572EPXARNB
MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 2
Freescale Semiconductor
21
DDR2 and DDR3 SDRAM Controller
Table 12 provides the DDR SDRAM Controller interface capacitance for DDR2 and DDR3.
Table 13 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. Please note that although the minimum data
rate for most off-the-shelf DDR3 DIMMs available is 800MHz, JEDEC specification does allow the
DDR3 to run at the data rate as low as 606MHz. Unless otherwise specified, the AC timing specifications
described in this section for DDR3 is applicable for data rate between 606MHz and 800MHz, as long as
the DC and AC specifications of the DDR3 memory to be used are compliant to both JEDEC specifications
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
VOUT GVDD.
Table 12. 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 13. 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.
Table 11. DDR3 SDRAM Interface DC Electrical Characteristics for GVDD(typ) = 1.5 V (continued)
Parameter/Condition
Symbol
Min
Typical
Max
Unit
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