Semiconductor integrated circuit and method of controlling memory

A semiconductor integrated circuit device comprising:

• a non-volatile memory having a first area and a second area;
• a storing module configured to store a second program for downloading a first program from an outside to the first area;
• and
• a processing module configured to execute the first and the second programs,
• wherein the first area is capable of being written and erased by the first program, and the second area is not capable of being erased by the first program,
• the processing module is configured to determine whether to download the first program to the first area according to data stored in the second area,
• the second area is configured to store:
• first data configured to download the first program to the first area at an initial operation;
• second data configured to control whether to rewrite the first program downloaded in the first area;
• and
• third data configured to forbid rewriting the first program downloaded in the first area.

A method of controlling a memory, the memory comprising a first area to which a first program is downloaded and a second area erased according to an erasing control signal, comprising:

• setting the erasing control signal in such a manner that the second area is not erased;
• and
• executing the first program downloaded to the first area after the erasing control signal is set;
• determining whether to rewrite the first program according to data stored in the second area,
• wherein upon executing the first program, a second data stored in the second area is rewritten to a third value indicative of rewriting the first program when the first program is rewritten, and
• whether to rewrite the first program is determined according to the second data.