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H8S/2225 数据表(PDF) 704 Page - Renesas Technology Corp |
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H8S/2225 数据表(HTML) 704 Page - Renesas Technology Corp |
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704 / 1071 page ![]() Section 15 Serial Communication Interface (SCI) Rev. 5.00 Aug 08, 2006 page 618 of 982 REJ09B0054-0500 Initialization Read RDR and clear RDRF flag in SSR to 0 Clear RE bit to 0 Start reception Start Error processing No No No Yes Yes ORER = 0 and PER = 0 RDRF = 1? All data received? Yes Figure 15.33 Example of Reception Processing Flow 15.7.8 Clock Output Control When the GM bit in SMR is set to 1, the clock output level can be fixed with bits CKE0 and CKE1 in SCR. At this time, the minimum clock pulse width can be made the specified width. Figure 15.34 shows the timing for fixing the clock output level. In this example, GM is set to 1, CKE1 is cleared to 0, and the CKE0 bit is controlled. Specified pulse width SCK CKE0 Specified pulse width Figure 15.34 Timing for Fixing Clock Output Level |
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