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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC8323ECZQAFDC датащи(PDF) 46 Page - Freescale Semiconductor, Inc |
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MPC8323ECZQAFDC датащи(HTML) 46 Page - Freescale Semiconductor, Inc |
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46 / 80 page  MPC8323E PowerQUICC™ II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 0 46 Freescale Semiconductor USB Figure 40 shows the timing with internal clock. Figure 40. AC Timing (Internal Clock) Diagram 20 USB This section provides the AC and DC electrical specifications for the USB interface of the MPC8323E. 20.1 USB DC Electrical Characteristics Table 53 provides the DC electrical characteristics for the USB interface. 20.2 USB AC Electrical Specifications Table 54 describes the general timing parameters of the USB interface of the MPC8323E. Table 53. USB DC Electrical Characteristics1 Parameter Symbol Min Max Unit High-level input voltage VIH 2OVDD + 0.3 V Low-level input voltage VIL –0.3 0.8 V High-level output voltage, IOH = –100 μAVOH OVDD – 0.2 — V Low-level output voltage, IOL = 100 μAVOL —0.2 V Input current IIN —±5 μA Note: 1. Note that the symbol VIN, in this case, represents the OVIN symbol referenced in Table 1 and Table 2. Table 54. USB General Timing Parameters Parameter Symbol1 Min Max Unit Notes USB clock cycle time tUSCK 20.83 — ns Full speed 48 MHz USB clock cycle time tUSCK 166.67 — ns Low speed 6 MHz Skew between TXP and TXN tUSTSPN —5 ns Skew among RXP, RXN, and RXD tUSRSPND — 10 ns Full speed transitions Serial CLK (Output) tHIIXKH tHIKHOV Input Signals: (See Note) Output Signals: (See Note) tHIIVKH tHIKHOX Note: The clock edge is selectable. |
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