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SH7101 Datasheet(PDF) 355 Page - Renesas Technology Corp |
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SH7101 Datasheet(HTML) 355 Page - Renesas Technology Corp |
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355 / 560 page  Section 10 Serial Communication Interface (SCI) Rev.1.00 Sep. 18, 2008 Page 321 of 522 REJ09B0069-0100 No <End> [1] Yes Initialization Start transmission Read TDRE flag in SSR [2] Write transmit data to TDR and clear TDRE flag in SSR to 0 No Yes No Yes Read TEND flag in SSR [3] Clear TE bit in SCR to 0 TDRE = 1 All data transmitted? TEND = 1 [1] SCI initialization: Set the TxD pin using the PFC. [2] SCI status check and transmit data write: Read SSR and check that the TDRE flag is set to 1, then write transmit data to TDR and clear the TDRE flag to 0. [3] Serial transmission continuation procedure: To continue serial transmission, be sure to read 1 from the TDRE flag to confirm that writing is possible, then write data to TDR, and then clear the TDRE flag to 0. Figure 10.17 Sample Serial Transmission Flowchart |
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