Method of difference update and a system thereof

A method performed by a mobile embedded system including a management controller and an execution controller, the method comprising:

• generating, by the management controller, difference data based on a data difference between a first partition and a second partition of a memory provided in the execution controller;
• downloading, by the execution controller, the generated difference data;
• and
• performing, by the execution controller, an update of the execution controller using the downloaded difference data,
• wherein the execution controller is a memory management unit (MMU)-less type controller.