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1500457 Datasheet(PDF) 16 Page - Freescale Semiconductor, Inc

Part No. 1500457
Description  Integrated Host Processor Hardware Specifications
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

1500457 Datasheet(HTML) 16 Page - Freescale Semiconductor, Inc

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MPC8349EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 13
16
Freescale Semiconductor
DDR and DDR2 SDRAM
Table 13 provides the DDR2 capacitance when GVDD(typ) = 1.8 V.
Table 14 provides the recommended operating conditions for the DDR SDRAM component(s) when
GVDD(typ) = 2.5 V.
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 equal 0.5 × GVDD, and to track GVDD DC variations as measured at the receiver. Peak-to-peak noise
on MVREF cannot 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 equal
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 13. DDR2 SDRAM Capacitance for GVDD(typ) = 1.8 V
Parameter/Condition
Symbol
Min
Max
Unit
Notes
Input/output capacitance: DQ, DQS, DQS
CIO
68
pF
1
Delta input/output capacitance: DQ, DQS, DQS
CDIO
—0.5
pF
1
Note:
1. This parameter is sampled. GVDD = 1.8 V ± 0.090 V, f = 1 MHz, TA = 25°C, VOUT = GVDD/2, VOUT (peak-to-peak) = 0.2 V.
Table 14. 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 +0.18
GVDD +0.3
V
Input low voltage
VIL
–0.3
MVREF –0.18
V
Output leakage current
IOZ
–9.9
–9.9
μA4
Output high current (VOUT = 1.95 V)
IOH
–15.2
mA
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 12. DDR2 SDRAM DC Electrical Characteristics for GVDD(typ) = 1.8 V (continued)


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