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IMX35 데이터시트(PDF) 24 Page - Freescale Semiconductor, Inc |
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IMX35 데이터시트(HTML) 24 Page - Freescale Semiconductor, Inc |
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24 / 148 page ![]() i.MX35 Applications Processors for Industrial and Consumer Products, Rev. 6 Freescale Semiconductor 24 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 — 40 — 60 % 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 15 16 36 38 76 80 mA/ns Output pin di/dt (high drive) tdit 25 pF 50 pF 8 9 20 21 45 47 mA/ns Output pin di/dt (standard drive) tdit 25 pF 50 pF 4 4 10 10 22 23 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 — 40 — 60 % 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 0V NVCC 20% 80% 80% 20% PA1 PA1 Output (at pin) |
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