KR200397254Y1 - Mp3 player - Google Patents

Abstract

The MP3 player is designed to automatically switch playback priority to an external memory card when an external memory card is inserted. To this end, a built-in flash memory for storing MP3 music files; A flash memory controller for controlling the embedded flash memory; A memory card slot into which an external memory card is inserted; And a processor for decoding the MP3 music file stored in the internal flash memory and the external memory and converting the decoded digital signal into an analog signal, wherein a slot of the memory card is provided with a power output terminal. The MP3 player is electrically connected to a chip enable terminal of the embedded flash memory controller.

Description

MP3 player {MP3 PLAYER}

The present invention relates to an MP3 player for an external memory card, and more particularly, to an MP3 player capable of automatically switching the playback priority to an external memory when an external memory card is inserted.

Currently MP3 players typically have built-in nonvolatile memory such as flash memory. The MP3 file downloaded from the computer or the like is stored in the memory. As the memory grows, more MP3 files can be stored.

However, since flash memory is still expensive, many people buy a small one at the time of initial purchase. However, when using MP3 players, as the files accumulate in memory, the storage capacity of the flash memory is hardly left, which is inconvenient to frequently repeat the cumbersome task of deleting an existing file to store a new file.

To solve this, there are MP3 players with additional external memory cards. However, in these cases, in order to execute a file on an external memory card, it is cumbersome because an external memory must be inserted and a separate file to be executed must be specified.

The present invention is to solve the above problems, an object of the present invention is to provide an MP3 player that can be automatically switched to the priority of the external memory card when the external memory card is inserted.

In order to achieve the above object, the present invention provides an MP3 player having the following configuration.

A built-in flash memory for storing MP3 music files;

A flash memory controller for controlling the embedded flash memory;

A memory card slot into which an external memory card is inserted; And

A processor for decoding MP3 music files stored in the internal flash memory and the external memory and converting the decoded digital signal into an analog signal,

A power output terminal is provided in a slot of the memory card, and the power output terminal is electrically connected to a chip enable terminal of the embedded flash memory controller.

On the other hand, the power output terminal is preferably a ground power supply terminal.

In addition, the MP3 player of the present invention may further include an audio amplifier for amplifying the electrical signal decoded by the processor.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1, the MP3 player 50 includes a built-in flash memory 41, a flash memory controller 52, a memory card slot 19, a processor 51, an audio amplifier 56, a USB connection jack 16, and the like. .

The external memory card 42 may be coupled to the MP3 player 50 through the slot 19 as necessary. The external memory card 42 may be of any type, but currently RS-MMC or Mini-SD cards are mainly used.

The processor 51 decodes the MP3 file stored in the internal flash memory 41 and the external memory card 42 and converts the decoded digital signal into an analog signal. The flash memory controller 52 controls the operation of the flash memory 41.

When the external memory card 42 is inserted into the slot 19 in the MP3 player 50 having such a configuration, logic "0" is applied to the flash memory controller 52 terminal through the ground terminal, so that the flash memory controller 52 It will not work.

When the external memory card 42 is removed from the slot 19, logic "1" is applied to the chip enable terminal of the memory controller 52 through the ground terminal. As a result, the flash memory controller 52 operates.

A method of using an MP3 player having such a configuration will be described.

When listening to music in the absence of the external memory card 42, the flash memory controller 52 operates so that the processor 51 executes music stored in the flash memory 41. The processor 51 decodes the MP3 file, converts the decoded digital signal into an analog signal, and transmits the decoded digital signal to the audio amplifier 56. The signal amplified by the audio amplifier 56 is output to the earphone 27 or the speaker 30.

Meanwhile, to listen to music stored in the external memory card 42, the external memory card 42 is inserted into the slot 19. Then, the power signal of the external memory card slot 19 is transmitted to the chip enable terminal of the flash memory controller 52. At this time, the logic "0" is applied to the chip enable terminal and the flash memory controller 52 is not operated. In this state, the file stored in the external memory card 42 is output through the processor 51.

When the external memory card 42 is removed from the slot 19 again, the logic memory 1 is applied to the chip enable terminal, and the flash memory controller 52 is operated again to listen to music stored in the internal flash memory 41. Will be.

Although the present invention has been described in detail with reference to the drawings, the present invention is not limited thereto, and various modifications may be made. Therefore, it is to be understood that the scope of the present invention is defined by the appended claims.

As described above, according to the present invention, when a built-in flash memory and an expandable external memory card are used together, files stored in the external memory card can be automatically executed first. This eliminates the inconvenience of having to manually select an option to run an external memory card.

1 is a block diagram showing the configuration of an MP3 player according to the present invention.

* Description of the symbols for the main parts of the drawings *

19: Memory slot 41: Built-in flash memory

42: external memory card 50: MP3 player

51: processor 52: integrated flash memory controller

56: audio amplifier

Claims (3)

A built-in flash memory for storing MP3 music files; A flash memory controller for controlling the embedded flash memory; A memory card slot into which an external memory card is inserted; And A processor for decoding MP3 music files stored in the internal flash memory and the external memory and converting the decoded digital signal into an analog signal, And a power output terminal in a slot of the memory card, wherein the power output terminal is electrically connected to a chip enable terminal of the embedded flash memory controller. The method of claim 1, And the power output terminal is a ground power terminal. The method of claim 1, And an audio amplifier for amplifying the electrical signal decoded by the processor.