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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AX68004LF датащи(PDF) 45 Page - ASIX Electronics Corporation |
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AX68004LF датащи(HTML) 45 Page - ASIX Electronics Corporation |
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45 / 57 page  45 AX6800x 2/4-Port USB KVM Switch SoC Copyright © 2015 ASIX Electronics Corporation. All rights reserved. Power-down Sequence Symbol Parameter Conditions Min Typ Max Units Tfall3 3.3V power supply fall time. From 3.3V to 0V. - >1 - s Tfall2 1.8V power supply fall time. From 1.8V to 0V. - 700 - ms T32 VDDIO falling from 3.3V to VDDK falling from 1.8V interval. - 8 - ms Tclk 12MHz crystal oscillator stop time. VDDIO falling from 3.3V to last clock transition of 12MHz crystal oscillator. - 100 - ms Trst3 VDD3IO falling from 3.3V to POR asserted low level interval. - 6.5 - ms Trst2 POR asserted low level to VDDK falling from 1.8V interval. - 1.5 - ms Note: The above typical timing data is measured from AX6800x test board. Figure 4-2: Power-down Sequence Timing Diagram and Table 0V 3.3V Tfall3 0V 1.8V Tfall2 T32 Tclk Trst3 Trst2 VDDK/VDDA_PLL/ VDD_FLASH VDDIO/VDDA_USB POR XIN |
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