I2C communication
Design and Architecture
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I am trying to communicate from my PC with a PCB using I2C. This PCB type was working but some of them are not now. I am receiving massage on my GUI control panel "I2C not connected". The problem on hardware I've found is that PIC microcontroller on PCB has 2.1v on its VSS (ground) pin. Firmware is transfered right to the PIC. I think this voltage appearing on Vss pin is creating problem. Is there any body to help me please, whether this is the problem and how to solve it please. Many thanks.
kd