Vehicle memory system based on 3D memory and method operating thereof

A vehicle memory system, comprising:

• a first function device including a processor configured to perform a safety function of a vehicle related to vehicle movement safety;
• a second function device including a processor configured to perform a convenience specification function related to general function of the vehicle;
• a first memory cell layer that is shared by the first function device and the second function device;
• a second memory cell layer that is used solely by the second function device;
• and
• a vehicle memory device configured to have a stacked structure including a through-silicon electrode connecting each of the first function device, the first memory cell layer, the second function device, and the second memory cell layer;
• wherein the st memory cell layer includes:
• a first sublayer configured to enable reading and writ the first function device and reading access by the second function device;
• and
• a second sublayer configured to enable reading and writing access by the second function device and only reading access by the first function device, and
• wherein the first sublayer and the second sublayer are stacked.