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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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L9679P Datenblatt(PDF) 191 Page - STMicroelectronics |
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L9679P Datenblatt(HTML) 191 Page - STMicroelectronics |
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191 / 272 page  DocID029275 Rev 1 191/272 L9679P Safing logic 271 12.2 SPI sensor data decoding Sensor data is regularly communicated with the main microcontroller through multiple SPI messages. The L9679P monitors SPI traffic on MISO_RS bus. Since not all communications between sensors and the microcontroller contain data, it is important for the decoder to properly sort the communications and extract only the targeted data. The solution involves defining specific masking functions, contained within independent safing records, programmed by the user. The following figures detail the SPI message decoding methodology and the ensuing comparisons of valid sensor data to the programmed thresholds. Figure 50. Safing engine – 32-bit message decoding flow chart |
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