Image forming apparatus which changes addresses that are used when data is read from and written to memories of articles of consumption and method of controlling the image forming apparatus

A method of controlling an image forming apparatus including an article of consumption comprising a memory, and a print controller to read out or with data from/to the memory, the method comprising:

• transmitting an initial access count, stored in the memory of the article of consumption, to the print controller;
• transmitting, from the print controller to the article of consumption, a request for a memory access to read out and/or write the data from/to the memory and updating the initial access count;
• selecting one of a plurality of memory-reap changing algorithms according to the updated access count and creating a changed memory-map, by which addressee in the memory are changed, using the selected memory-map changing algorithm such that a data that is stored at an initial address is stored at a new address allowing a new data to be stored at the initial address;
• reading and/or writing the data from/to the memory using the changed addresses of the changed memory-map;
• and
• reading from a same address of the memory a plurality of times so as to detect whether the address is changed from the change) in the read data from the same address in order to determine a normal operation of the article of consumption.

A method of controlling an image forming apparatus including an article of consumption comprising a memory, and a print controller to read out and/or write data from/to the memory, the method comprising:

• reading data from the memory at one address a plurality of times;
• comparing the data read the plurality of times therewith;
• recognizing that addresses for the memory are changed each time a memory access is performed when the read data are different from each other, and recognizing that the addresses are not changed each time the memory access is performed when the read data are identical to each other and
• reading from the same address of the memory a plurality of times so as to detect whether the address is changed from the change in the read data from the same address in order to determine a normal operation of the article of consumption;
• wherein each time a read access is requested at the same initial address such that data is stored the initial address is changed to a new address allowing new data to be stored at the initial address.

An article of consumption for an image forming apparatus comprising a print controller to read and/or to write data from to the article of consumption, the article of consumption comprising:

• a memory to store the data;
• and
• a memory controller to change addresses of the memory according to a request for the memory access;
• wherein each time a read access is requested at the same initial address such that data is stored the initial address is changed to a new address allowing new data to be stored at the initial address;
• the memory controller comprises a signal measurement device to read data from a same address of the memory a plurality of times so as to detect whether the address is changed from the change in the read data from the same address in order to determine a normal operation of the article of consumption.