参数资料
型号: MPC8343ZQAGDB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 400 MHz, MICROPROCESSOR, PBGA620
封装: 29 X 29 MM, 2.46 MM HEIGHT, 1 MM PITCH, PLASTIC, BGA-620
文件页数: 8/79页
文件大小: 992K
代理商: MPC8343ZQAGDB
MPC8343EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 10
16
Freescale Semiconductor
DDR and DDR2 SDRAM
Table 15 provides the DDR capacitance when GVDD(typ) = 2.5 V.
Table 16 provides the current draw characteristics for MVREF.
6.2
DDR and DDR2 SDRAM AC Electrical Characteristics
This section provides the AC electrical characteristics for the DDR and DDR2 SDRAM interface.
6.2.1
DDR and DDR2 SDRAM Input AC Timing Specifications
Table 17 provides the input AC timing specifications for the DDR2 SDRAM when GVDD(typ) = 1.8 V.
Output low current (VOUT = 0.35 V)
IOL
15.2
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
V
OUT GVDD.
Table 15. 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 16. 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 supply up to 500 μA current.
Table 17. DDR2 SDRAM Input AC Timing Specifications for 1.8-V Interface
At recommended operating conditions with GVDD of 1.8 ± 5%.
Parameter
Symbol
Min
Max
Unit
Notes
AC input low voltage
VIL
—MVREF – 0.25
V
AC input high voltage
VIH
MVREF + 0.25
V
Table 14. DDR SDRAM DC Electrical Characteristics for GVDD(typ) = 2.5 V
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