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HD6432351 Datasheet(PDF) 613 Page - Renesas Technology Corp |
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HD6432351 Datasheet(HTML) 613 Page - Renesas Technology Corp |
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613 / 1025 page  Section 13 Serial Communication Interface (SCI) Rev. 3.00 Sep 15, 2006 page 579 of 988 REJ09B0330-0300 Figure 13.4 shows a sample SCI initialization flowchart. Wait <Transfer completion> Start initialization Set data transfer format in SMR and SCMR [1] Set CKE1 and CKE0 bits in SCR (TE, RE bits 0) No Yes Set value in BRR Clear TE and RE bits in SCR to 0 [2] [3] Set TE and RE bits in SCR to 1, and set RIE, TIE, TEIE, and MPIE bits [4] 1-bit interval elapsed? [1] Set the clock selection in SCR. Be sure to clear bits RIE, TIE, TEIE, and MPIE, and bits TE and RE, to 0. When the clock is selected in asynchronous mode, it is output immediately after SCR settings are made. [2] Set the data transfer format in SMR and SCMR. [3] Write a value corresponding to the bit rate to BRR. Not necessary if an external clock is used. [4] Wait at least one bit interval, then set the TE bit or RE bit in SCR to 1. Also set the RIE, TIE, TEIE, and MPIE bits. Setting the TE and RE bits enables the TxD and RxD pins to be used. Figure 13.4 Sample SCI Initialization Flowchart |
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