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USB3613 数据表(PDF) 49 Page - Microchip Technology |
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USB3613 数据表(HTML) 49 Page - Microchip Technology |
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49 / 57 page ![]() USB 2.0 Hi-Speed 3-Port Hub Controller Optimized for Portable Applications Datasheet 2014 Microchip Technology Inc. DS00001714A-page 49 9.5 AC Specifications This section details the various AC timing specifications of the device. 9.5.1 Power-On Configuration Strap Valid Timing Figure 9.2 illustrates the configuration strap timing requirements, in relation to power-on, for applications where RESET_N is not used at power-on. The operational levels (Vopp) for the external power supplies are detailed in Section 9.2, "Operating Conditions**," on page 45. Note: For RESET_N configuration strap timing requirements, refer to Section 9.5.2, "Reset and Configuration Strap Timing," on page 50. Figure 9.2 Power-On Configuration Strap Valid Timing Table 9.5 Power-On Configuration Strap Valid Timing SYMBOL DESCRIPTION MIN TYP MAX UNITS tcsh Configuration strap hold after external power supplies at operational levels 1ms All External Power Supplies Vopp Configuration Straps tcsh |
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