Patent ID: 6662104
Filing Date: 2003-12-09
Classification: G01C

Abstract:
A navigation device comprising:at least one component providing a signal representing a parameter utilized in providing navigational guidance; a motherboard for receiving the signal, said motherboard being designed in accordance with specifications of said component, said motherboard comprising: a vehicle interface matched with a vehicle in which said navigation device is mounted, said vehicle interface providing communication with an engine control unit which controls an engine in the vehicle, said vehicle interface receiving signals from sensors including a vehicle speed sensor; a current position detection processing unit, said current position detection processing unit receiving signals from current position detection means; a standardized sub-board comprising: component identification means for judging the type of said motherboard, and for generating control signals for the motherboard in accordance with the judged type of motherboard; and a CPU for overall control of the entire navigation device and for execution of a vehicle navigation program; a working memory, a program memory containing the vehicle navigation program, an ASIC, and a voice LSI; and connection means for connecting said motherboard and sub-board.