MPC8569E datasheet(46/127 Pages) FREESCALE

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MPC8569E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 1

DDR2 and DDR3 SDRAM Controller

Freescale Semiconductor

2.4.1

DDR2 and DDR3 SDRAM Interface DC Electrical Characteristics

The following table provides the recommended operating conditions for the DDR SDRAM controller when interfacing to

DDR2 SDRAM.

The following table provides the recommended operating conditions for the DDR SDRAM controller when interfacing to

DDR3 SDRAM.

Table 13. DDR2 SDRAM Interface DC Electrical Characteristics

At recommended operating condition with GVDD =1.8 V

Parameter

Symbol

Min

Max

Unit

Notes

I/O reference voltage

MVREFn

0.49

× GV

0.51

× GV

V2, 3, 4

Input high voltage

VIH

MVREFn +0.125

—

Input low voltage

VIL

—

MVREFn – 0.125

Output high current (VOUT =1.320 V)

IOH

—–13.4

6, 7

Output low current (VOUT =0.380 V)

IOL

13.4

—

6, 7

I/O leakage current

IOZ

–50

μA8

Notes:

1. GVDD is expected to be within 50 mV of the DRAM’s voltage supply at all times. The DRAM’s and memory controller’s voltage

supply may or may not be from the same source.

2. MVREFn is expected to be equal to 0.5

× GV

DD and to track GVDD DC variations as measured at the receiver. Peak-to-peak

noise on MVREFn may not exceed the MVREFn DC level by more than ±2% of GVDD (that is, ± 36 mV).

3. VTT is not applied directly to the device. It is the supply to which far end signal termination is made, and it is expected to be

equal to MVREFn with a min value of MVREFn – 0.04 and a max value of MVREFn +0.04. VTT should track variations in the

DC level of MVREFn.

4. The voltage regulator for MVREFn must meet the specifications stated in Table 16.

5. Input capacitance load for DQ, DQS, and DQS are available in the IBIS models.

6. IOH and IOL are measured at GVDD = 1.7 V.

7. Refer to the IBIS model for the complete output IV curve characteristics.

8. Output leakage is measured with all outputs disabled, 0 V

≤ V

OUT ≤ GVDD.

Table 14. DDR3 SDRAM Interface DC Electrical Characteristics

At recommended operating condition with GVDD =1.5 V

Parameter

Symbol

Min

Max

Unit

Note

I/O reference voltage

MVREFn

0.49

× GV

0.51

× GV

V2, 3, 4

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