PCIMX258CJM4A datasheet(33/144 Pages) FREESCALE

33 / 144 page

i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 3

Freescale Semiconductor

3.6.3.1

DDR_TYPE = 00 Standard Setting I/O AC Parameters and Requirements

Table 22 shows AC parameters for mobile DDR I/O. These settings are suitable for mDDR and DDR2

1.8V (

± 5%) applications.

Table 22. AC Parameters for Mobile DDR I/O

Parameter

Symbol

Load

Condition

Min.

Rise/Fall

Typ.

Max.

Rise/Fall

Units

Notes

Duty cycle

Fduty

—

Clock frequency

—

133

MHz

Output pad transition times (max. drive)

tpr

25 pF

50 pF

0.52/0.51

0.98/0.96

0.79/0.72

1.49/1.34

1.25/1.09

2.31/1.98

Output pad transition times (high drive)

tpr

25 pF

50 pF

1.13/1.10

2.15/2.10

1.74/1.55

3.28/2.92

2.71/2.30

5.11/4.31

Output pad transition times (standard drive)

tpr

25 pF

50 pF

2.26/2.19

4.30/4.18

3.46/3.07

6.59/5.79

5.39/4.56

10.13/8.55

Output pad propagation delay (max. drive),

50%–50%

tpo

15 pF

35 pF

0.80/1.03

1.06/1.32

1.36/1.50

1.76/1.90

2.21/2.40

2.83/2.82

Output pad propagation delay (high drive),

50%–50%

tpo

15 pF

35 pF

1.04/1.27

1.63/1.90

1.74/1.83

2.63/2.69

2.79/2.70

4.18/3.86

Output pad propagation delay (standard

drive), 50%–50%

tpo

15 pF

35 pF

1.55/1.80

2.72/3.06

2.53/2.57

4.31/4.29

4.03/3.76

6.80/6.19

Output pad propagation delay (max. drive),

40%–60%

tpo

15 pF

35 pF

0.80/0.91

1.06/1.12

1.44/1.59

1.76/1.91

2.24/2.29

2.74/2.75

Output pad propagation delay (high drive),

40%–60%

tpo

15 pF

35 pF

1.04/1.09

1.63/1.56

1.73/1.83

2.43/2.52

2.69/2.62

3.79/3.62

Output pad propagation delay (standard

drive), 40%–60%

tpo

15 pF

35 pF

1.50/1.74

2.73/2.42

2.36/2.41

3.77/3.78

3.67/3.46

5.86/5.37

Output enable to output valid delay (max.

drive), 50%–50%

tpv

15 pF

35 pF

1.17/1.01

1.43/1.30

1.93/1.61

2.33/2.00

3.06/2.55

3.69/3.13

Output enable to output valid delay (high

drive), 50%–50%

tpv

15 pF

35 pF

1.38/1.28

1.97/1.92

2.25/1.99

3.16/2.86

3.58/3.10

5.01/4.39

Output enable to output valid delay

(standard drive), 50%–50%

tpv

15 pF

35 pF

1.92/1.57

3.12/3.16

3.11/2.79

4.97/4.59

4.98/4.13

7.97/6.98

Output enable to output valid delay (max.

drive), 40%–60%

tpv

15 pF

35 pF

1.28/1.12

1.49/1.36

2.01/1.70

2.33/2.01

3.09/2.60

3.60/3.06

Output enable to output valid delay (high

drive), 40%–60%

tpv

15 pF

35 pF

1.43/1.33

1.90/1.84

2.24/1.99

2.96/2.68

3.47/3.02

4.59/4.03

Output enable to output valid delay

(standard drive), 40%–60%

tpv

15 pF

35 pF

1.85/1.78

2.80/2.81

2.91/2.62

4.37/4.53

4.54/3.96

6.88/6.05

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