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H8/3003 Datasheet(PDF) 473 Page - Renesas Technology Corp |
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H8/3003 Datasheet(HTML) 473 Page - Renesas Technology Corp |
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473 / 715 page  Figure 13-4 Sample Flowchart for SCI Initialization Clear TE and RE bits to 0 in SCR Transmitting or receiving No Yes 1. 2. 3. 4. Select the communication format in SMR. Write the value corresponding to the bit rate in BRR. This step is not necessary when an external clock is used. Select communication format in SMR 1 Set value in BRR 2 3 Set TE or RE bit to 1 in SCR Set RIE, TIE, TEIE, and MPIE bits as necessary 4 1 bit interval elapsed? Wait Wait for at least the interval required to transmit or receive 1 bit, then set the TE or RE bit to 1 in SCR. Set the RIE, TIE, TEIE, and MPIE bits as necessary. Setting the TE or RE bit enables the SCI to use the TxD or RxD pin. Start of initialization Set CKE1 and CKE0 bits in SCR (leaving TE and RE bits cleared to 0) Select the clock source in SCR. Clear the RIE, TIE, TEIE, MPIE, TE, and RE bits to 0. If clock output is selected in asynchronous mode, clock output starts immediately after the setting is made in SCR. 455 |
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