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Low cost system architecture for CD data access in car navigation sets

IP.com Disclosure Number: IPCOM000009373D
Original Publication Date: 2002-Aug-20
Included in the Prior Art Database: 2002-Aug-20

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Peter Wiese


In car navigation systems the map data is usually coming from a CDROM. The CDROM drive is coupled to the host MCU via an IDE/ATAPI interface. Using an audio only CD drive with a simple serial interface the cost of the drive, the more simple wiring and the MCU without the parallel ATA interface will drive down the overall car navigation system cost. A car navigation system mainly comprises a GPS sensor for positioning, a velocity and a heading sensor for dead reckoning, a CDROM for mass storage of the map data, a display and a keyboard for the MMI and a MCU for the route calculation. These building blocks are usually complemented by a car radio or multimedia system.