Central control device of vehicle navigation multimedia system

A central controller of vehicle carried multimedia navigation system is composed of the audio circuit for receiving and reproducing audio signals, the video circuit for receiving and displaying video signals, the man-machine interface for controlling the working state of central controller, and the CPU for receiving instructions from man-machine interface and controlling the audio and video circuits. Said CPU has serial bus, I2C bus, parallel bus, AD interface, interrupt interface and multiple I/O ports.