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Information device including main processing circuit, interface circuit, and microcomputer

  • US 7,984,223 B2
  • Filed: 03/12/2010
  • Issued: 07/19/2011
  • Est. Priority Date: 10/26/2005
  • Status: Active Grant
First Claim
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1. An information device packaged in one package, comprising:

  • a main function unit including a main processing circuit for executing signal processing related to a main function in said information device and a first microcomputer for controlling said main processing circuit by executing a first firmware program; and

    an interface function unit including a first interface circuit for receiving data from an exterior device located outside of said information device to provide to said main function unit, a second interface circuit for performing an authentication operation with the exterior device, a second microcomputer for controlling said first interface circuit, and a memory for storing a second firmware program for controlling said first interface circuit,wherein said second microcomputer downloads said second firmware from said memory by executing a download program, and controlling said authentication operation of said second interface circuit,wherein said interface function unit is subjected to a single-chip process separately from said main function unit,wherein said first interface circuit and said second microcomputer are connected to each other by using a parallel interface, andwherein said first interface circuit is an interface circuit conforming to HDMI (High-Definition Multimedia Interface).

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