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SH7708 Fiches technique(PDF) 437 Page - Renesas Technology Corp |
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SH7708 Fiches technique(HTML) 437 Page - Renesas Technology Corp |
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437 / 633 page ![]() 419 0 185 371 0 185 371 0 Base clock Receive data (RxD) Synchro- nization sampling timing Data sampling timing 186 clock cycles 372 clock cycles Start bit D0 D1 Figure 14.8 Receive Data Sampling Timing in Smart Card Mode The receive margin is found from the following equation: For smart card mode: M = (0.5 – ) 1 2N D – 0.5 N – (L – 0.5)F – (1 + F) × 100% Where: M = Receive margin (%) N = Ratio of bit rate to clock (N = 372) D = Clock duty (D = 0 to 1.0) L = Frame length (L = 10) F = Absolute value of clock frequency deviation Using this equation, the receive margin when F = 0 and D = 0.5 is as follows: M = (0.5 – 1/2 × 372) × 100% = 49.866% |
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