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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) 488 Page - Renesas Technology Corp |
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H8/3003 数据表(HTML) 488 Page - Renesas Technology Corp |
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488 / 715 page  Transmitting Serial Data (Synchronous Mode): Figure 13-16 shows a sample flowchart for transmitting serial data and indicates the procedure to follow. Figure 13-16 Sample Flowchart for Serial Transmitting Start transmitting Read TDRE flag in SSR TDRE = 1? Write transmit data in TDR and clear TDRE flag to 0 in SSR End 1 2 3 No Yes No Yes SCI initialization: the transmit data output function of the TxD pin is selected automatically. SCI status check and transmit data write: read SSR, check that the TDRE flag is 1, then write transmit data in TDR and clear the TDRE flag to 0. Read TEND flag in SSR No Yes 1. 2. 3. Initialize Clear TE bit to 0 in SCR To continue transmitting serial data: after checking that the TDRE flag is 1, indicating that data can be written, write data in TDR, then clear the TDRE flag to 0. When the DMAC is activated by a transmit- data-empty interrupt request (TXI) to write data in TDR, the TDRE flag is checked and cleared automatically. All data transmitted? TEND = 1? 470 |
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