IMX35 datasheet(24/148 Pages) FREESCALE

24 / 148 page

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

Freescale Semiconductor

Figure 6 shows the output pin transition time waveform.

Figure 6. Output Pin Transition Time Waveform

4.8.1

AC Electrical Test Parameter Definitions

AC electrical characteristics in Table 14 through Table 19 are not applicable for the output open drain

pull-down driver.

The dI/dt parameters are measured with the following methodology:

•

The zero voltage source is connected between pin and load capacitance.

•

The current (through this source) derivative is calculated during output transitions.

Table 14. AC Electrical Characteristics of GPIO Pins in Slow Slew Rate Mode

[NVCC = 3.0 V–3.6 V]

Parameter

Symbol

Test

Condition

Min.

Rise/Fall

Typ. Rise/Fall

Max.

Rise/Fall

Units

Duty cycle

Fduty

—

Output pin slew rate (max. drive)

tps

25 pF

50 pF

0.79/1.12

0.49/0.73

1.30/1.77

0.84/1.23

2.02/2.58

1.19/1.58

V/ns

Output pin slew rate (high drive)

tps

25 pF

50 pF

0.48/0.72

0.27/0.42

0.76/1.10

0.41/0.62

1.17/1.56

0.63/0.86

V/ns

Output pin slew rate (standard

drive)

tps

25 pF

50 pF

0.25/0.40

0.14/0.21

0.40/0.59

0.21/0.32

0.60/0.83

0.32/0.44

V/ns

Output pin di/dt (max. drive)

tdit

25 pF

50 pF

mA/ns

Output pin di/dt (high drive)

tdit

25 pF

50 pF

mA/ns

Output pin di/dt (standard

drive)

tdit

25 pF

50 pF

mA/ns

Table 15. AC Electrical Characteristics of GPIO Pins in Slow Slew Rate Mode

[NVCC = 1.65 V–1.95 V]

Parameter

Symbol

Test Condition

Min.

Rise/Fall

Typ.

Max.

Rise/Fall

Units

Duty cycle

Fduty

—

Output pin slew rate (max. drive)

tps

25 pF

50 pF

0.30/0.42

0.20/0.29

0.54/0.73

0.35/0.50

0.91/1.20

0.60/0.80

V/ns

NVCC

20%

80%

20%

PA1

Output (at pin)

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