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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC8309EC датащи(PDF) 45 Page - Freescale Semiconductor, Inc |
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MPC8309EC датащи(HTML) 45 Page - Freescale Semiconductor, Inc |
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45 / 82 page  MPC8309 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 0 Freescale Semiconductor 45 Timers 17 Timers This section describes the DC and AC electrical specifications for the timers of the MPC8309. 17.1 Timer DC Electrical Characteristics Table 45 provides the DC electrical characteristics for the MPC8309 timer pins, including TIN, TOUT, TGATE, and RTC_PIT_CLK. 17.2 Timer AC Timing Specifications Table 46 provides the timer input and output AC timing specifications. Figure 34 provides the AC test load for the timers. Figure 34. Timers AC Test Load Table 45. Timer DC Electrical Characteristics Characteristic Symbol Condition Min Max Unit Output high voltage VOH IOH =–6.0mA 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 V IN OVDD — ±5 A Table 46. 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 SYS_CLK_IN. 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. Output Z0 = 50 OVDD/2 RL = 50 |
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