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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PC912XDP512F0MPVR 데이터시트(PDF) 504 Page - Freescale Semiconductor, Inc |
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PC912XDP512F0MPVR 데이터시트(HTML) 504 Page - Freescale Semiconductor, Inc |
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504 / 1348 page  Chapter 11 Serial Communication Interface (S12SCIV5) MC9S12XDP512 Data Sheet, Rev. 2.21 504 Freescale Semiconductor To determine the value of a data bit and to detect noise, recovery logic takes samples at RT8, RT9, and RT10. Table 11-17 summarizes the results of the data bit samples. NOTE The RT8, RT9, and RT10 samples do not affect start bit verification. If any or all of the RT8, RT9, and RT10 start bit samples are logic 1s following a successful start bit verification, the noise flag (NF) is set and the receiver assumes that the bit is a start bit (logic 0). To verify a stop bit and to detect noise, recovery logic takes samples at RT8, RT9, and RT10. Table 11-18 summarizes the results of the stop bit samples. Table 11-17. Data Bit Recovery RT8, RT9, and RT10 Samples Data Bit Determination Noise Flag 000 0 0 001 0 1 010 0 1 011 1 1 100 0 1 101 1 1 110 1 1 111 1 0 Table 11-18. Stop Bit Recovery RT8, RT9, and RT10 Samples Framing Error Flag Noise Flag 000 1 0 001 1 1 010 1 1 011 0 1 100 1 1 101 0 1 110 0 1 111 0 0 |
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