MAP DRAWING DEVICE AND DISPLAY CONTROL METHOD OF MAP DATA

PROBLEM TO BE SOLVED: To provide a map drawing device capable of suppressing a use amount of a video memory and power consumption. SOLUTION: The map drawing device includes: an arithmetic processing part which operates according to a map drawing program to output addresses of map data to be drawn; an address difference detection circuit which compares addresses of pieces of the map data to be sequentially output from the arithmetic processing part with one another to determine whether or not to output a transfer start trigger signal to a data transfer control part; and the data transfer control part which directly transfers the map data of the address instructed by the arithmetic processing part from a map data storage medium to the video memory based on the transfer start trigger signal to be output from the address difference detection circuit. COPYRIGHT: (C)2010,JPO&INPIT