MCIMX31_09 Datasheet, PDF (23/118 Pages) Freescale Semiconductor, Inc – Multimedia Applications Processors

Electrical Characteristics
Table 17. AC Electrical Characteristics of Fast¹ General I/O ²
ID
Parameter
PA1 Output Transition Times (Max Drive)
Output Transition Times (High Drive)
Output Transition Times (Std Drive)
Symbol
Test
Condition
Min
Typ
Max
tpr
25 pF
0.68 1.33 2.07
50 pF
1.34 2.6 4.06
tpr
25 pF
.91 1.77 2.74
50 pF
1.79 3.47 5.41
tpr
25 pF
1.36 2.64 4.12
50 pF
2.68 5.19 8.11
1 _{Fast/slow characteristic is selected per GPIO (where available) by “slew rate” control. See reference manual.}
2 _{Use of GPIO in fast mode with the associated NVCC > 1.95 V can result in excessive overshoot and ringing.}
Units
ns
ns
ns
Table 18. AC Electrical Characteristics of DDR I/O
ID
Parameter
PA1 Output Transition Times (DDR Drive)¹
Output Transition Times (Max Drive)
Output Transition Times (High Drive)
Output Transition Times (Std Drive)
Symbol
Test
Condition
Min
tpr
25 pF
0.51
50 pF
0.97
tpr
25 pF
0.67
50 pF
1.29
tpr
25 pF
.99
50 pF
1.93
tpr
25 pF
1.96
50 pF
3.82
1 _{Use of DDR Drive can result in excessive overshoot and ringing.}
Typ
0.82
1.58
1.08
2.1
1.61
3.13
3.19
6.24
Max
1.28
2.46
1.69
3.27
2.51
4.89
4.99
9.73
Units
ns
ns
ns
ns
4.3.3 Clock Amplifier Module (CAMP) Electrical Characteristics
This section outlines the Clock Amplifier Module (CAMP) specific electrical characteristics. Table 19
shows clock amplifier electrical characteristics.
Table 19. Clock Amplifier Electrical Characteristics for CKIH Input
Parameter
Input Frequency
VIL (for square wave input)
VIH (for square wave input)
Sinusoidal Input Amplitude
Duty Cycle
Min
Typ
15
—
0
—
(VDD ¹â€“ 0.25)
—
0.4 ²
—
45
50
Max
75
0.3
3
VDD
55
Units
MHz
V
V
Vp-p
%
1 _{VDD is the supply voltage of CAMP. See reference manual.}
2 _{This value of the sinusoidal input will be measured through characterization.}
MCIMX31/MCIMX31L Technical Data, Rev. 4.3
Freescale Semiconductor
23