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Inconsistency in I2C Interface

Question asked by sachin Mohan Kurawatti on May 14, 2018
Latest reply on May 20, 2018 by igorpadykov



We notice inconsistency in data received from touch controller.

  • We get valid data for few cycle
  • We get data read error for few touch input
  • We get NAK for data read from touch after address cycle.
  • We get ACK for the data but data read is FF all the time( here the I2C clock is held low for one or more cycle in between 8 bit read)


I have summarized all data in Touch panel I2C Issue.PPT and LA waveform capture(PNG Image).