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8X930AX датащи(PDF) 33 Page - Intel Corporation |
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8X930AX датащи(HTML) 33 Page - Intel Corporation |
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33 / 38 page ![]() ADVANCE INFORMATION 29 8x930Ax UNIVERSAL SERIAL BUS (USB) MICROCONTROLLER 5.7 Testing Waveforms Figure 18. AC Testing Input, Output Waveforms Figure 19. Float Waveforms AC inputs during testing are driven at VCC – 0.5V for a logic 1 and 0.45 V for a logic 0. Timing measurements are made at 0.45 V Inputs Outputs A4118-01 VIH MIN VOL MAX VCC – 0.5 0.2 VCC + 0.9 0.2 VCC – 0.1 a min of VIH for a logic 1 and VOL for a logic 0. VLOAD + 0.1 V VLOAD – 0.1 V Timing Reference Points VLOAD VOH – 0.1 V VOL + 0.1 V For timing purposes, a port pin is no longer floating when a 100 mV change from load voltage occurs and begins to float when a 100 mV change from the loading VOH/VOL level occurs with IOL/IOH = ± 20 mA. A4117-01 |
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