IMX35 datasheet(28/148 Pages) FREESCALE

28 / 148 page

i.MX35 Applications Processors for Industrial and Consumer Products, Rev. 6

Freescale Semiconductor

Table 22. AC Electrical Characteristics of DDR Type IO Pins in mDDR Mode

Parameter

Symbol

Test Condition

Min.

Rise/Fall

Typ.

Max.

Rise/Fall

Units

Duty cycle

Fduty

—

Clock frequency

—

133

—

MHz

Output pin slew rate (max. drive)

tps

25 pF

50 pF

0.80/0.92

0.43/0.50

1.35/1.50

0.72/0.81

2.23/2.27

1.66/1.68

V/ns

Output pin slew rate (high drive)

tps

25 pF

50 pF

0.37/0.43

0.19/0.23

0.62/0.70

0.33/0.37

1.03/1.05

0.75/0.77

V/ns

Output pin slew rate (standard drive)

tps

25 pF

50 pF

0.18/0.22

0.10/0.12

0.31/0.35

0.16/0.18

0.51/0.53

0.38/0.39

V/ns

Output pin di/dt (max. drive)

tdit

25 pF

50 pF

171

183

407

432

mA/ns

Output pin di/dt (high drive)

tdit

25 pF

50 pF

100

106

232

246

mA/ns

Output pin di/dt (standard drive)

tdit

25 pF

50 pF

116

123

mA/ns

Table 23. AC Electrical Characteristics of DDR Type IO Pins in SDRAM Mode

Parameter

Symbol

Test Condition

Min.

Rise/Fall

Min. Clock

Frequency

Max.

Rise/Fall

Units

Clock frequency

—

125

—

MHz

Output pin slew rate (max. drive)

tps

25 pF

50 pF

1.11/1.20

0.97/0.65

1.74/1.75

0.92/0.94

2.42/2.46

1.39/1.30

V/ns

Output pin slew rate (high drive)

tps

25 pF

50 pF

0.76/0.80

0.40/0.43

1.16/1.19

0.61/0.63

1.76/1.66

0.93/0.87

V/ns

Output pin slew rate (standard drive)

tps

25 pF

50 pF

0.38/0.41

0.20/0.22

0.59/0.60

0.31/0.32

0.89/0.82

0.47/0.43

V/ns

Output pin di/dt (max. drive)

tdit

25 pF

50 pF

198

209

398

421

mA/ns

Output pin di/dt (high drive)

tdit

25 pF

50 pF

132

139

265

279

mA/ns

Output pin di/dt (standard drive)

tdit

25 pF

50 pF

132

139

mA/ns

Table 24. AC Electrical Characteristics of DDR Type IO Pins in SDRAM Mode Max Drive (1.8 V)

Parameter

Symbol

Test Condition

Min.

Rise/Fall

Typ.

Max.

Rise/Fall

Units

Clock frequency

—

125

—

MHz

Output pin slew rate (max. drive)1

tps

25 pF

50 pF

2.83/2.68

1.59/1.49

1.84/1.85

1.03/1.05

1.21/1.40

0.70/0.75

V/ns

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