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HD6433635SW Datasheet(PDF) 271 Page - Renesas Technology Corp |
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HD6433635SW Datasheet(HTML) 271 Page - Renesas Technology Corp |
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271 / 418 page  257 Transmitting: Figure 10.14 shows a typical flow chart for data transmission. After SCI3 initialization, follow the procedure below. Start Read bit TDRE in SSR TDRE = 1? Write transmit data in TDR Continue data transmission? Read bit TEND in SSR TEND = 1? Write 0 to bit TE in SCR3 End No Yes No Yes No Yes 1 2 1. 2. Read the serial status register (SSR), and after confirming that bit TDRE = 1, write transmit data in the transmit data register (TDR). When data is written to TDR, TDRE is automatically cleared to 0. If clock output has been selected, after data is written to TDR, the clock is output and data transmission begins. To continue transmitting data, first read TDRE to confirm that it is set to 1, indicating that data writing is enabled; then write the next data to TDR. When data is written to TDR, TDRE is automatically cleared to 0. Figure 10.14 Typical Data Transmission Flow Chart in Synchronous Mode |
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