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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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H8/3003 数据表(PDF) 485 Page - Renesas Technology Corp |
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H8/3003 数据表(HTML) 485 Page - Renesas Technology Corp |
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485 / 715 page  Figure 13-13 shows an example of SCI receive operation using a multiprocessor format. Figure 13-13 Example of SCI Receive Operation (8-Bit Data with Multiprocessor Bit and One Stop Bit) 1 Start bit 0 D0 D1 D7 1 Stop bit 1 Data (ID1) MPB Start bit 0 D0 D1 D7 0 Stop bit 1 Data (data1) MPB 1 Idle (mark) state MPIE RDRF RDR value ID1 RXI request (multiprocessor interrupt), MPIE = 0 RXI handler reads RDR data and clears RDRF flag to 0 Not own ID, so MPIE bit is set to 1 again No RXI request, RDR not updated a. Own ID does not match data 1 Start bit 0 D0 D1 D7 1 Stop bit 1 Data (ID2) MPB Start bit 0 D0 D1 D7 0 Stop bit 1 Data (data2) MPB 1 Idle (mark) state MPIE RDRF RDR value ID2 RXI request (multiprocessor interrupt), MPIE = 0 RXI interrupt handler reads RDR data and clears RDRF flag to 0 Own ID, so receiving continues, with data received by RXI interrupt handler MPIE bit is set to 1 again b. Own ID matches data ID1 Data 2 467 |
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