參數(shù)資料
型號: MPC8309CVMAHFCA
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 417 MHz, RISC PROCESSOR, PBGA489
封裝: 19 X 19 MM, 1.61 MM HEIGHT, 0.80 MM PITCH, LEAD FREE, PLASTIC, MAPBGA-489
文件頁數(shù): 7/81頁
文件大小: 484K
代理商: MPC8309CVMAHFCA
MPC8309 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 1
Freescale Semiconductor
15
DDR2 SDRAM
6.2
DDR2 SDRAM AC Electrical Characteristics
This section provides the AC electrical characteristics for the DDR2 SDRAM interface.
6.2.1
DDR2 SDRAM Input AC Timing Specifications
The following table provides the input AC timing specifications for the DDR2 SDRAM (GVDD(typ) = 1.8
V).
The following table provides the input AC timing specifications for the DDR2 SDRAM interface.
Table 12. DDR2 SDRAM DC Electrical Characteristics for GVDD(typ) = 1.8 V
Parameter/Condition
Symbol
Min
Max
Unit
Note
I/O supply voltage
GVDD
1.7
1.9
V
1
I/O reference voltage
MVREF
0.49
GVDD
0.51
GVDD
V2
I/O termination voltage
VTT
MVREF – 0.04
MVREF + 0.04
V
3
Input high voltage
VIH
MVREF+ 0.125
GVDD +0.3
V
Input low voltage
VIL
–0.3
MVREF – 0.125
V
Output leakage current
IOZ
–9.9
9.9
A4
Output high current (VOUT = 1.35 V)
IOH
–13.4
mA
Output low current (VOUT = 0.280 V)
IOL
13.4
mA
Notes:
1. GVDD is expected to be within 50 mV of the DRAM GVDD 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 should track variations in the DC level of MVREF.
4. Output leakage is measured with all outputs disabled, 0 V
VOUT GVDD.
Table 13. DDR2 SDRAM Capacitance for GVDD(typ) = 1.8 V
Parameter/Condition
Symbol
Min
Max
Unit
Note
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 = 1.8 V ± 0.100 V, f = 1 MHz, TA =25°C, VOUT = GVDD 2,
VOUT (peak-to-peak) = 0.2 V.
Table 14. DDR2 SDRAM Input AC Timing Specifications for 1.8-V Interface
At recommended operating conditions with GVDD of 1.8 V± 100mV.
Parameter
Symbol
Min
Max
Unit
Note
AC input low voltage
VIL
MVREF – 0.25
V
AC input high voltage
VIH
MVREF + 0.25
V
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