Digital disc player with last play position memory

1 . A digital disc player comprising:

a main control unit (MCU);

a central processing unit (CPU) comprising a controller and a first storage unit; and

a detecting circuit configured for detecting a voltage variation of at least one of the MCU and the CPU;

wherein when the power of the digital disc player is cut off, the detecting circuit generates a temporary direct voltage, the controller automatically generates a store signal and sends the store signal to the first storage unit, and the first storage unit stores track information of a playing digital disc according to the store signal; and

when the power of the digital disc player is turned on again, the MCU addresses the track information from the first storage unit according to a control signal received from the controller.

2 . The digital disc player in claim 1 , further comprising a disc reader, the disc reader comprising:

an optical pickup for irradiating a light beam onto a recording surface of the digital disc and receiving the reflected light;

a spindle motor for rotating the digital disc; and

a servo control mechanism for controlling an irradiation spot of the light beam and the rotation of the spindle motor.

3 . The digital disc player in claim 2 , wherein the disc reader is configured for reading the digital disc from a play position according to the track information obtained from the MCU.

4 . The digital disc player in claim 2 , further comprising a data circuit configured for amplifying a read signal provided from the disc reader.

5 . The digital disc player in claim 4 , wherein the data circuit is further configured for correcting errors of the read signal, and separating video information of the read signal from audio information of the read signal.

6 . The digital disc player in claim 4 , further comprising a decode circuit, an audio circuit, and a video circuit, wherein the decode circuit is configured for decoding the signal comprising video information and audio information, and transferring a decoded video signal to the video circuit and a decoded audio signal to the audio circuit.

7 . The digital disc player in claim 6 , wherein the video circuit outputs the decoded video signal to a display device.

8 . The digital disc player in claim 6 , wherein the audio circuit outputs the decoded audio signal to a speaker.

9 . The digital disc player in claim 1 , wherein the CPU further comprises a second storage unit configured for storing track information of a playing digital disc according to a control signal generated by the controller in response to a user instruction.

10 . The digital disc player in claim 9 , wherein the CPU further comprises a selector configured for receiving the user instruction and outputting a corresponding user instruction signal to the controller.

11 . The digital disc player in claim 9 , wherein the MCU outputs track information to the first and second storage units continuously.

12 . A digital disc player comprising:

a main control unit (MCU);

a central processing unit (CPU) comprising a controller, and a first storage unit and a second storage unit, each of said first storage and said second storage respectively connected to the controller and the MCU; and

a detecting circuit connected to the MCU and the CPU, and configured for detecting a voltage variation of at least one of the MCU and the CPU.