32-bit systems based on multimedia car navigation system

2. Background

Car audio products, from radios, tape drive to the CD player, after several decades of gradual improvement and upgrading process, in the car when the CD has just began to spread, car multimedia concept was still being deduced, the rapid technological environment promotion, automotive products, has faced the navigation, networking, mobile computing and other functions even faster into the pressure and the actual needs, solid music store and digital compression, digital audio broadcasting and digital TV broadcasting, a variety of products continue to enter the car.

Now, with the application matures LCD, car audio and video products entered the era of flat panel displays, upgrading from the dashboard to display the content and quality improvement, we see a display as the center of the automotive product demand has been implemented it is placed in front of us in them, standard parts for automotive navigation products, has been in the high-end cars is a reality, and realized in ordinary cars, is within sight.

3. Car audio products, the evolution process of structural design

Car audio products, long-term control structure in the above simple logic development, at that time, the system is mainly to support radio, tape has been gradually, the system does not require the control of the load, the simple logic control will be able to meet their needs.

When the CD into the automotive sector, car audio 4-bit MCU to enter the era, AM / FM radio tuning control, and buttons, display, and CD treatment, a 4-bit microcontroller is sufficient, this era lasted more than a decade to this day is still the mainstream products on the market.

Ordinarily, car audio products should be technology development program to the same experience of 4 to