Memory controller, image processing controller, and electronic instrument

A memory controller which is used for writing pixel data into a memory, the memory controller comprising:

• a rectangular area designation register in which data for designating a rectangular area inside a display area of a display device is set;
• an address generation circuit which generates an address which specifies a storage location of the memory corresponding to a position of each pixel inside the rectangular area based on the data set in the rectangular area designation register;
• a pixel data designation register in which pixel data subjected to bit block transfer is designated as designated pixel data;
• and
• a bit block transfer control register which is used for enabling the bit block transfer;
• when the bit block transfer is enabled by the bit block transfer control register, the memory controller writing the designated pixel data at a storage location of the memory corresponding to a position of each pixel inside the rectangular area, based on the address generated by the address generation circuit corresponding to a bit block transfer rectangular area;
• and
• when the bit block transfer is disabled by the bit block transfer control register, the memory controller writing pixel data of a given input image at a storage location of the memory corresponding to a position of each pixel inside the rectangular area, based on the address generated by the address generation circuit corresponding to an input pixel data transfer rectangular area.