Navigation device for vehicle

A navigation device for a vehicle comprising:

• a memory device including a NAND type flash memory and a controller, wherein the NAND type flash memory stores a boot program and a predetermined program, which is read out by executing the boot program, the controller searches all failure blocks in the NAND type flash memory when the memory device is energized, and the controller manages a corresponding relation between a logic block and a physical block with eliminating searched failure blocks;
• a back-up power source for setting down a voltage of a battery mounted on the vehicle to a predetermined voltage;
• a power source switch for coupling the memory device with the back-up power source in an operation state;
• a power source for generating another predetermined voltage with using the back-up power source in the operation state;
• a control device energized from the power source with the another predetermined voltage so as to be activated, wherein the control device determines whether activation is performed for the first time under a condition that the memory device is connected to the back-up power source when the control device is activated, the control device executes a stand-by process for standing by until an initial setting process of the memory device is completed when the control device determines that the activation is performed for the first time, and then, the control device executes a boot process for reading a boot program from the memory device, and the control device executes the boot process without performing the stand-by process when the control device determines that the activation is after the first time;
• and
• a power source control device,
• wherein the power source control device controls the power source switch to turn on when the navigation device is coupled with the back-up power source,
• wherein the power source switch transmits an activation signal for activating the control device, according to an activation operation of an user,
• wherein the power source control device controls the power source to function when the power source control device receives the activation signal from the power source switch,
• wherein the power source switch stops transmitting the activation signal when the user releases the activation operation, and
• wherein the power source control device stops the operation state of the power source when the power source switch stops the activation signal.