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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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H8/3003 数据表(PDF) 499 Page - Renesas Technology Corp |
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H8/3003 数据表(HTML) 499 Page - Renesas Technology Corp |
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499 / 715 page  Restrictions on Usage of DMAC • When an external clock source is used for the serial clock, after the DMAC updates TDR, allow an interval of at least five system clock (ø) cycles before input of the serial clock to start transmitting. If the serial clock is input within four states of the TDR update, a malfunction may occur. (See figure 13-22.) • To have the DMAC read RDR, be sure to select the SCI receive-data-full interrupt (RXI) as the activation source with bits DTS2 to DTS0 in DTCR. Figure 13-22 Synchronous Transmission Using DMAC (Example) In operation with an external clock source, be sure to be t > 4 states. SCK TDRE t D0 D1 D2 D3 D4 D5 D6 D7 Note: 481 |
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