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參數(shù)資料
型號: MPC8548ECPXAQGB
廠商: Freescale Semiconductor
文件頁數(shù): 66/151頁
文件大小: 0K
描述: MPU POWERQUICC III 783-PBGA
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(yīng)商設(shè)備封裝: 783-FCPBGA(29x29)
包裝: 托盤
MPC8548E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 9
Freescale Semiconductor
21
DDR and DDR2 SDRAM
Table 13 provides the recommended operating conditions for the DDR SDRAM controller when
GVDD(typ) = 2.5 V.
Table 14 provides the DDR I/O capacitance when GVDD(typ) = 2.5 V.
This table provides the current draw characteristics for MVREF.
Table 13. DDR SDRAM DC Electrical Characteristics for GVDD(typ) = 2.5 V
Parameter/Condition
Symbol
Min
Max
Unit
Notes
I/O supply voltage
GVDD
2.375
2.625
V
1
I/O reference voltage
MVREF
0.49
GV
DD
0.51
GV
DD
V2
I/O termination voltage
VTT
MVREF – 0.04
MVREF + 0.04
V
3
Input high voltage
VIH
MVREF + 0.15
GVDD + 0.3
V
Input low voltage
VIL
–0.3
MVREF – 0.15
V
Output leakage current
IOZ
–50
50
A4
Output high current (VOUT = 1.95 V)
IOH
–16.2
mA
Output low current (VOUT = 0.35 V)
IOL
16.2
mA
Notes:
1. GVDD is expected to be within 50 mV of the DRAM VDD at all times.
2. MVREF 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 MVREF may not exceed ±2% of the DC value.
3. VTT is not applied directly to the device. It is the supply to which far end signal termination is made and is expected to be
equal to MVREF. This rail must track variations in the DC level of MVREF.
4. Output leakage is measured with all outputs disabled, 0 V
V
OUT GVDD.
Table 14. DDR SDRAM Capacitance for GVDD(typ) = 2.5 V
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
Notes
Current draw for MVREF
IMVREF
—500
A1
Note:
1. The voltage regulator for MVREF must be able to supply up to 500 A current.
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