MCIMX503CVM8B datasheet(41/134 Pages) FREESCALE

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Electrical Characteristics

i.MX50 Applications Processors for Consumer Products, Rev. 2

Freescale Semiconductor

4.5.2

GPIO I/O Fast AC Parameters

Table 27 shows the AC parameters for GPIO fast I/O.

Output Pad di/dt (High Drive)

tdit

mA/ns

Output Pad di/dt (Medium drive)

tdit

mA/ns

Output Pad di/dt (Low drive)

tdit

mA/ns

Input Transition Times2

trm

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

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

Table 27. GPIO I/O Fast AC Parameters

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

Output Pad Transition Times (Low Drive)

tr, tf

15 pF

35 pF

4.82/4.50

10.54/9.95

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

0.69/0.78

0.36/0.39

V/ns

Output Pad Slew Rate (High Drive)

tps

15 pF

35 pF

0.55/0.62

0.28/0.30

V/ns

Output Pad Slew Rate (Medium Drive)

tps

15 pF

35 pF

0.39/0.44

0.19/0.20

V/ns

Output Pad Slew Rate (Low Drive)

tps

15 pF

35 pF

0.21/0.22

0.09/0.1

V/ns

Output pad di/dt (Max drive)

tdit

—

mA/ns

Output pad di/dt (High drive)

tdit

—

mA/ns

Output pad di/dt (Medium drive)

tdit

—

mA/ns

Output pad di/dt (Low drive)

tdit

—

mA/ns

Input transition times2

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

trm

—

Table 26. GPIO I/O Slow AC Parameters (continued)

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

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