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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC8306EC датащи(PDF) 36 Page - Freescale Semiconductor, Inc |
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MPC8306EC датащи(HTML) 36 Page - Freescale Semiconductor, Inc |
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36 / 76 page  MPC8306 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 0 36 Freescale Semiconductor DUART 12 DUART This section describes the DC and AC electrical specifications for the DUART interface of the MPC8306. 12.1 DUART DC Electrical Characteristics Table 34 provides the DC electrical characteristics for the DUART interface of the MPC8306. 12.2 DUART AC Electrical Specifications Table 35 provides the AC timing parameters for the DUART interface of the MPC8306. Table 34. DUART DC Electrical Characteristics Parameter Symbol Min Max Unit High-level input voltage VIH 2OVDD +0.3 V Low-level input voltage OVDD VIL –0.3 0.8 V High-level output voltage, IOH = –100 AVOH OVDD –0.2 — V Low-level output voltage, IOL = 100 AVOL —0.2 V Input current (0 V VIN OVDD)1 IIN —±5 A Note: 1. Note that the symbol VIN, in this case, represents the OVIN symbol referenced in Table 1 and Table 2. Table 35. DUART AC Timing Specifications Parameter Value Unit Notes Minimum baud rate 256 baud Maximum baud rate >1,000,000 baud 1 Oversample rate 16 — 2 Notes: 1. Actual attainable baud rate is limited by the latency of interrupt processing. 2. The middle of a start bit is detected as the 8th sampled 0 after the 1-to-0 transition of the start bit. Subsequent bit values are sampled each 16th sample. |
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