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HD6433635SW Datasheet(PDF) 264 Page - Renesas Technology Corp |
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HD6433635SW Datasheet(HTML) 264 Page - Renesas Technology Corp |
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264 / 418 page  250 Transmitting: Figure 10.8 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? TEND = 1? Read bit TEND in SSR Break output? Set PDR = 0 and PCR = 1 Clear bit TE in SCR3 to 0 End 1 2 3 1. 2. 3. Read the serial status register (SRR), 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. 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. To output a break signal when transmission ends, first set the port values PCR = 1 and PDR = 0, then clear bit TE in SCR3 to 0. No Yes No No Yes No Yes Yes Figure 10.8 Typical Data Transmission Flow Chart (Asynchronous Mode) |
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