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STE12PS データシート(PDF) 29 Page - STMicroelectronics |
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STE12PS データシート(HTML) 29 Page - STMicroelectronics |
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29 / 44 page  Obsolete Product(s) - Obsolete Product(s) STE12PS I2C slave protocol overview 29/44 5.6 Register addressing: read command format The general format of the read command is shown in Figure 15. First part of the general read command consists of writing an address to the Index Register of the POE controller. If the Index Register already contains the address of the register to be read, as the result of a previous read or write command, then it is not necessary to write that address to the Index Register again. After each byte is read from the POE controller, the Index Register is required to increment by one. A read command can contain from 0 to 255 bytes. Figure 15. Read command S 6 54 32 1 0 Device address W 7 . Register address (K) 6543210 S 6 54 32 1 0 Device address R 7 . Read data (K) 6543210 7 6 54 32 1 0 Read data (K + 1) 7 Read data (K + 2) 6543210 7 6 54 32 1 0 Read data (K + N) P |
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