In-vehicle electronic device and life prediction method for nonvolatile memory

Abstract

Provided is an in-vehicle electronic device including a nonvolatile memory and a heat generating component mounted on one substrate, the in-vehicle electronic device being capable of accurately measuring a temperature of the nonvolatile memory without being affected by a distance from the heat generating component or a use condition. An electronic device mounted on a vehicle includes a processing controller that processes information handled by the electronic device or controls the electronic device, a memory having a plurality of writing areas, a temperature sensor, and a remaining warranty period calculation unit that calculates a remaining warranty period of the memory based on an output from the temperature sensor. The remaining warranty period calculation unit switches between a first determination method for obtaining the remaining warranty period using a first temperature coefficient determined regardless of a distance between the memory and each of a plurality of the temperature sensors and a second determination method for obtaining the remaining warranty period using a second temperature coefficient determined in accordance with the distance between the memory and each of the plurality of the temperature sensors in accordance with a time from activation of the in-vehicle electronic device to obtain the remaining warranty period.

Dependencies are inferred from the claim text.