参数资料
型号: MPC8347VRAJD
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 533 MHz, RISC PROCESSOR, PBGA620
封装: 29 X 29 MM, 2.46 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-620
文件页数: 10/102页
文件大小: 1094K
代理商: MPC8347VRAJD
MPC8347E PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 11
Freescale Semiconductor
15
DDR SDRAM
6
DDR SDRAM
This section describes the DC and AC electrical specifications for the DDR SDRAM interface of the
MPC8347E.
NOTE
The information in this document is accurate for revision 1.1 silicon and
earlier. For information on revision 3.0 silicon and earlier versions see the
MPC8347EA PowerQUICC II Pro Integrated Host Processor Hardware
Document,” for silicon revision level determination.
6.1
DDR SDRAM DC Electrical Characteristics
Table 11 provides the recommended operating conditions for the DDR SDRAM component(s) of the
MPC8347E.
Table 12 provides the DDR capacitance.
Table 11. DDR SDRAM DC Electrical Characteristics
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
× GVDD
0.51
× GVDD
V2
I/O termination voltage
VTT
MVREF – 0.04
MVREF + 0.04
V
3
Input high voltage
VIH
MVREF + 0.18
GVDD + 0.3
V
Input low voltage
VIL
–0.3
MVREF – 0.18
V
Output leakage current
IOZ
–10
10
μA4
Output high current (VOUT = 1.95 V)
IOH
–15.2
mA
Output low current (VOUT = 0.35 V)
IOL
15.2
mA
MVREF input leakage current
IVREF
—5
μA
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 12. DDR SDRAM Capacitance
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.
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