Semiconductor integrated circuit for displaying image

A semiconductor integrated circuit comprising:

• a normal bus;
• an extension bus having the same bit width as the normal bus;
• a frame memory having a memory width equal to an integer multiple of the number of bits of the normal bus;
• a line buffer having a plurality of line regions to store pixel data of input image data;
• a line buffer writing control portion to control a direction in which the pixel data is to be written to the line buffer;
• a line buffer reading control portion to read out the pixel data stored in the line buffer and to output the read out pixel data to the normal bus and the extension bus selectively;
• a frame memory writing control portion to control a destination in the frame memory to which the pixel data obtained from the normal bus and the extension bus is to be written;
• and
• an address control portion to control a writing address in the frame memory,
• wherein the line buffer writing control portion controls the writing direction in the line buffer in accordance with an image rotation command signal, the line buffer reading control portion divides the read out pixel data and outputs the divided pixel data to the normal bus and the extension bus respectively, and the frame memory writing control portion controls the writing destination in the frame memory of the pixel data obtained from the normal bus and the extension bus.