In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:

Kiwi,
  With I2C you should never pull the SDA or SCL lines high with the SX. 
  That is the job of the pull-up resistor. 
  The SX code should only pull the lines low or allow them to float (input).
  Look at the code generated by the SX/B I2C commands.
Bean.

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