Why won't my Si114x or Si1132 device respond to Commands?


The Si1141, Si1142, Si1143, Si1145, Si1146, Si1147, and Si1132 devices have a minimum i2c speed requirement of 90 khz. Writes to the Command register at speeds below this mimimum speed will have unpredictable behavior.

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  • It should be mentioned in bold letters in the datasheets thatthese devices do not adhere to the I²C specification where minimum speed is ~zero