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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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SH7708 数据表(PDF) 405 Page - Renesas Technology Corp |
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SH7708 数据表(HTML) 405 Page - Renesas Technology Corp |
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405 / 633 page  387 Transmitting Serial Data (Synchronous Mode): Figure 13.16 shows a sample flowchart for transmitting serial data. The procedure for transmitting serial data is: 1. SCI status check and transmit data write: Read the serial status register (SCSSR), check that the TDRE bit is 1, then write transmit data in the transmit data register (SCTDR) and clear TDRE to 0. 2. To continue transmitting serial data: Read the TDRE bit to check whether it is safe to write (if it reads 1); if so, write data in SCTDR, then clear TDRE to 0. Start transmission Read TDRE bit in SCSSR All data transmitted? Yes No End transmission (1) (2) TDRE = 1? Write transmit data to SCTDR and clear TDRE bit in SCSSR to 0 Yes No Read TEND bit in SCSSR TEND = 1? Yes No Clear TE bit in SCSCR to 0 Note: Numbers in parentheses refer to the preceding procedure. Figure 13.16 Sample Flowchart for Serial Transmitting |
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