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Vehicle device

  • US 9,594,517 B2
  • Filed: 12/12/2013
  • Issued: 03/14/2017
  • Est. Priority Date: 01/17/2013
  • Status: Active Grant
First Claim
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1. A vehicle device comprising:

  • a first data processing unit that processes first data classified as a first category when the first data processing unit is supplied with a first operating voltage that is based on a battery voltage supplied from a vehicle-mounted power source;

    a second data processing unit that processes second data classified as a second category different from the first category when the second data processing unit is supplied with a second operating voltage that is based on the battery voltage supplied from the vehicle-mounted power source;

    an external data storage unit that is externally attached to both the first data processing unit and the second data processing unit and that is capable of storing at least one of the first data and the second data; and

    a built-in data storage unit that is built in the second data processing unit and that is capable of retaining the stored second data even if a voltage value of the battery voltage decreases to a predetermined value for a predetermined period of time,wherein at least one of the first data processing unit and the second data processing unit varies a storage destination and a storage frequency in accordance with priorities assigned to the first data and the second data, andwherein the second data processing unit constantly stores at least part of the second data in the built-in data storage unit.

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