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FS3000 数据表(PDF) 10 Page - Renesas Technology Corp |
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FS3000 数据表(HTML) 10 Page - Renesas Technology Corp |
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10 / 13 page ![]() FS3000 Datasheet R36DS0009EU0100 Rev.1.00 May 31, 2022 Page 10 5.3 Calculating Checksum The checksum used for data integrity is the 2’s complement (negative) of the 256-modulo (8-bit) sum of the data bytes (does not include I2C address). Figure 7 shows the 5 bytes read: Example: Byte 1, 0xCC (Checksum) Byte 2, 0x01 Byte 3, 0x99 Byte 4, 0x01 or 0x00 Byte 5, 0x99 or 0x00 The 256-modulo (8-bit) sum is calculated as: ������������������������=0��������01+0��������99+0��������01+0��������99=0��������134 Validating the data payload is done by calculating the sum and adding it to the checksum. If the result is 0x00, then the data is valid. ��������ℎ������������������������������������������������+������������������������=0������������������������+0��������134=0��������00 |
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