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H8S/2218 数据表(PDF) 484 Page - Renesas Technology Corp |
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H8S/2218 数据表(HTML) 484 Page - Renesas Technology Corp |
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484 / 750 page ![]() Section 12 Serial Communication Interface Rev.6.00 Jun. 03, 2008 Page 436 of 698 REJ09B0074-0600 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 12.33 Example of Reception Processing Flow 12.7.9 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 12.34 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 12.34 Timing for Fixing Clock Output Level |
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