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H8/3028F Datasheet(PDF) 565 Page - Renesas Technology Corp |
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H8/3028F Datasheet(HTML) 565 Page - Renesas Technology Corp |
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565 / 923 page  Rev. 2.00, 09/03, page 535 of 890 14.4 Usage Notes The following points should be noted when using the SCI as a smart card interface. Receive Data Sampling Timing and Receive Margin in Smart Card Interface Mode: In smart card interface mode, the SCI operates on a base clock with a frequency of 372 times the transfer rate. In reception, the SCI synchronizes internally with the fall of the start bit, which it samples on the base clock. Receive data is latched at the rising edge of the 186th base clock pulse. The timing is shown in figure 14.11. Internal base clock 372 clocks 186 clocks Receive data (RxD) Synchronization sampling timing D0 D1 Data sampling timing 185 371 0 371 185 0 0 Start bit Figure 14.11 Receive Data Sampling Timing in Smart Card Interface Mode |
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