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IMX6SOLOX_I2C backdrive

Question asked by Viktor Afanasyev on Feb 14, 2018
Latest reply on Feb 22, 2018 by Artur Petukhov

In my board, based on the MCIMX6X2AVN08AB microprocessor, I use the real time clock PCF2129T connected to an I2C interface of the microcontroller. The real time clock PCF2129T uses a lithium battery as uninterrupted power source. The lithium battery presents while the system is powered down.  Is it needed to use some bus isolation circuit to prevent back drive from the lithium battery throw lines SDA and SLC of I2C interface to input lines of MCIMX6X2AVN08AB microprocessor or the real time clock PCF2129T ensures an absence the back drive from the lithium battery to lines of an I2C interface?

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