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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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L99MOD50XP Fiches technique(PDF) 26 Page - STMicroelectronics |
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L99MOD50XP Fiches technique(HTML) 26 Page - STMicroelectronics |
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26 / 42 page  Functional description of the SPI L99MOD50XP 26/42 DS12615 Rev 4 4.1.5 SPI communication flow At the beginning of each communication the master can read the contents of the <SPI-frame-ID> register (ROM address 03H) of the slave device. This 8-bit register indicates the SPI frame length (24 bit) and the availability of additional features. Each communication frame consists of a command byte which is followed by 2 data bytes. The data returned on DO within the same frame always starts with the <Global Status> Byte. It provides general status information about the device. It is followed by 2 data bytes (i. e. ‘In-frame-response’). For Write cycles the <Global Status> Byte is followed by the previous content of the addressed register. Figure 9. Write and read SPI |
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