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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC8378ECVRAFGA датащи(PDF) 39 Page - Freescale Semiconductor, Inc |
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MPC8378ECVRAFGA датащи(HTML) 39 Page - Freescale Semiconductor, Inc |
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39 / 126 page  MPC8378E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 2 Freescale Semiconductor 39 Local Bus 9.2 USB AC Electrical Specifications Table 39 describes the general timing parameters of the USB interface of the device. Figure 21 and Figure 22 provide the AC test load and signals for the USB, respectively. Figure 21. USB AC Test Load Figure 22. USB Interface Timing Diagram 10 Local Bus This section describes the DC and AC electrical specifications for the local bus interface of the MPC8378E. Table 39. USB General Timing Parameters (ULPI Mode Only) Parameter Symbol1 Min Max Unit USB clock cycle time tUSCK 15 — ns Input setup to USB clock—all inputs tUSIVKH 4— ns input hold to USB clock—all inputs tUSIXKH 1— ns USB clock to output valid—all outputs tUSKHOV —7 ns Output hold from USB clock—all outputs tUSKHOX 2— ns Output Z0 = 50 Ω OVDD/2 RL = 50 Ω Output Signals tUSKHOV USBDR_CLK Input Signals tUSIXKH tUSIVKH tUSKHOX |
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