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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC8323E датащи(PDF) 37 Page - Freescale Semiconductor, Inc |
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MPC8323E датащи(HTML) 37 Page - Freescale Semiconductor, Inc |
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37 / 82 page  MPC8323E PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 4 Freescale Semiconductor 37 Timers Figure 27 shows the PCI output AC timing conditions. Figure 27. PCI Output AC Timing Measurement Condition 13 Timers This section describes the DC and AC electrical specifications for the timers of the MPC8323E. 13.1 Timer DC Electrical Characteristics Table 38 provides the DC electrical characteristics for the MPC8323E timer pins, including TIN, TOUT, TGATE, and RTC_CLK. 13.2 Timer AC Timing Specifications Table 39 provides the timer input and output AC timing specifications. Table 38. Timer DC Electrical Characteristics Characteristic Symbol Condition Min Max Unit Output high voltage VOH IOH = –6.0 mA 2.4 — V Output low voltage VOL IOL = 6.0 mA — 0.5 V Output low voltage VOL IOL = 3.2 mA — 0.4 V Input high voltage VIH —2.0 OVDD +0.3 V Input low voltage VIL — –0.3 0.8 V Input current IIN 0 V ≤ VIN ≤ OVDD — ±5 μA Table 39. Timer Input AC Timing Specifications1 Characteristic Symbol2 Min Unit Timers inputs—minimum pulse width tTIWID 20 ns Notes: 1. Input specifications are measured from the 50% level of the signal to the 50% level of the rising edge of CLKIN. Timings are measured at the pin. 2. Timer inputs and outputs are asynchronous to any visible clock. Timer outputs should be synchronized before use by any external synchronous logic. Timer inputs are required to be valid for at least tTIWID ns to ensure proper operation. CLK Output Delay tPCKHOV High-Impedance tPCKHOZ Output tPCKHOX |
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