IMX53CEC datasheet(40/204 Pages) FREESCALE

40 / 204 page

i.MX53xD Applications Processors for Consumer Products, Rev. 2

Freescale Semiconductor

Electrical Characteristics

4.5.1

GPIO I/O AC Electrical Characteristics

AC electrical characteristics for GPIO I/O in slow and fast modes are presented in the Table 21 and

Table 22, respectively. Note that the fast or slow I/O behavior is determined by the appropriate control bit

in the IOMUXC control registers.

Table 21. GPIO I/O AC Parameters Slow Mode

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Output Pad Transition Times (Max Drive)

tr, tf

15 pF

35 pF

——

1.91/1.52

3.07/2.65

Output Pad Transition Times (High Drive)

tr, tf

15 pF

35 pF

——

2.22/1.81

3.81/3.42

Output Pad Transition Times (Medium Drive)

tr, tf

15 pF

35 pF

——

2.88/2.42

5.43/5.02

Output Pad Transition Times (Low Drive)

tr, tf

15 pF

35 pF

——

4.94/4.50

10.55/9.70

Output Pad Slew Rate (Max Drive)1

1 tps is measured between VIL to VIH for rising edge and between VIH to VIL for falling edge.

tps

15 pF

35 pF

0.5/0.65

0.32/0.37

——

V/ns

Output Pad Slew Rate (High Drive)1

tps

15 pF

35 pF

0.43/0.54

0.26/0.41

——

Output Pad Slew Rate (Medium Drive)1

tps

15 pF

35 pF

0.34/0.41

0.18/0.2

——

Output Pad Slew Rate (Low Drive)1

tps

15 pF

35 pF

0.20/0.22

0.09/0.1

——

Output Pad di/dt (Max Drive)

tdit

—

mA/ns

Output Pad di/dt (High Drive)

tdit

—

Output Pad di/dt (Medium drive)

tdit

—

Output Pad di/dt (Low drive)

tdit

—

Input Transition Times2

2 Hysteresis mode is recommended for inputs with transition times greater than 25 ns.

trm

—

Table 22. GPIO I/O AC Parameters Fast Mode

Parameter

Symbol

Test

Condition

Min

Typ

Max

Unit

Output Pad Transition Times (Max Drive)

tr, tf

15 pF

35 pF

—

1.45/1.24

2.76/2.54

Output Pad Transition Times (High Drive)

tr, tf

15 pF

35 pF

—

1.81/1.59

3.57/3.33

Output Pad Transition Times (Medium

Drive)

tr, tf

15 pF

35 pF

—

2.54/2.29

5.25/5.01

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