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Interface and communication protocol for a mobile device with a smart battery

  • US 8,543,162 B2
  • Filed: 08/30/2012
  • Issued: 09/24/2013
  • Est. Priority Date: 10/14/2005
  • Status: Active Grant
First Claim
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1. A mobile communication device comprising:

  • a main processor for controlling operation of the mobile communication device;

    a smart battery coupled to the main processor for providing supply power to the mobile communication device, the smart battery comprising a battery processor for controlling operation of the smart battery and communicating with the main processor, and a battery module having one or more batteries for providing the supply power; and

    a battery interface coupled between the main processor and the battery processor for providing communication therebetween, wherein the battery interface comprises;

    a data communication line and protection circuitry comprising an RC network that protects the main processor from electrostatic discharge; and

    first and second tri-state buffers that are coupled between the RC network and the main processor and configured to receive enable/disable control signals to aid in resolving voltage compatibility issues between the main processor and the battery processor.

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