CN2366945Y

CN2366945Y - Main circuit board for digital CD disc player

Info

Publication number: CN2366945Y
Application number: CN 99209123
Authority: CN
Inventors: 王少成
Original assignee: WANLIDA ELECTRONIC Co Ltd NANJING INDUSTRIAL ZONE FUJIAN PROV
Current assignee: WANLIDA ELECTRONIC Co Ltd NANJING INDUSTRIAL ZONE FUJIAN PROV
Priority date: 1999-04-22
Filing date: 1999-04-22
Publication date: 2000-03-01
Anticipated expiration: 2009-04-22

Abstract

The utility model discloses a main circuit board for a digital CD disc player, which is characterized in that multifunctional interfaces (26, 30) which are provided with at least twenty pins are added on the usually-used main circuit board for a digital CD disc player, and the utility model is provided with a group of output end ports (28) which are connected with a video-signal input line of an external apparatus, wherein, the pins of the multi-function interfaces (26, 30) are respectively connected with corresponding signal lines of the original line correspondingly, and are matched with a corresponding D-shaped socket (cathode and anode) to be connected with the external apparatus in butting so as to realize bidirectional communication with the external apparatus, making the digital CD disc player have versatility, compatibility and openness. The utility model has the advantages that users can utilize the external apparatus to browse on the Internet, download information, send and receive E-mails, and the users can appreciate movies or sing kara-ok when playing games at another terminal.

Description

The DVD player main circuit board

The utility model relates to a kind of DVD player main circuit board, specifically relates to a kind of DVD player main circuit board that has the versatile interface that two groups of audio frequency and video output ports and an energy be connected with external unit.

Existing most of video disc players belong to enclosed construction substantially, can only read information in the CD by movement, and can not be unfavorable for the upgrading of product by the external unit input information.During the consumer wants upgrading, can only spend very big cost to remove to transform hardware, often cause the waste of overlapping investment and resource.Though the DVD player that has can surf the web or play games, can not support 8 and 16 recreation simultaneously, can not download information from the Internet, and the function that can not in online, enjoy former DVD player.This is because this two classes video disc player can only be exported simulating signal mostly, even if the digital signal of exporting that has is one tunnel simple serial signal also, thereby can't carry out two-way communication with external unit.

The purpose of this utility model is to provide a kind of new DVD player main circuit board, the DVD player of producing thus is opening structure, can carry out two-way communication with external equipment, the user can surf the web by external equipment when enjoying former DVD player function, download message, transmitting-receiving E-mail and play games etc.

The purpose of this utility model is achieved in that have been increased a versatile interface and has had two groups of audio frequency and video output ports on the DVD player main circuit board, the pin of this versatile interface respectively with former circuit in corresponding signal lines such as microprocessor (hereinafter to be referred as MCU), commutation circuit, power lead and ground wire connect one to one, and be connected with external unit by D type socket (yin, yang) with same pin.Under the coordination of MCU in machine, this DVD player both can be carried digital signal to external equipment, made external equipment become the extension part of DVD player, also can receive external equipment and carry the signal of coming, and had expanded the function of DVD player.The audio-video signal of external equipment input by commutation circuit and wherein one group of audio frequency and video output port be transported to terminal, and the audio-video signal of the former function of another group audio frequency and video output port output DVD player, the purpose of realization a tractor serves several purposes.

Because the utility model adopts versatile interface to realize docking with external unit, and have two groups of audio frequency and video output ports, the DVD player of producing has thus made full use of internal and external resources, has stronger opening and compatible, is convenient to the upgrading of product.The utility model also has so favourable beneficial effect fruit in addition: can also utilize when enjoying former DVD player function that external equipment surfs the web, download message, transmitting-receiving E-mail or play games.

Fig. 1 is the schematic diagram of a kind of embodiment of the present utility model.

Fig. 2 is the schematic diagram of the another kind of embodiment of the utility model.

Fig. 3 is an application block diagram of the present utility model.

Below in conjunction with drawings and the specific embodiments the utility model is described in further details:

In schematic diagram shown in Figure 1, versatile interface 26 is for having 25 pins, and its profile and size and general 25 pin D type sockets (the moon) are identical, and the annexation and the principle of work of its pin and former circuit are as follows:

(1)

1,21,22,23,24,25 ground wires

(2)

2,3,4,5,6,7,8,9 links to each other with interface P2.0, P2.1, P2.2, P2.3, P2.4, P2.5, P2.6, the P2.7 of MCU27 respectively in order and is coupled on 8 bit data bus in the machine by MCU27, becomes 8 bit data bus that the inside and outside message exchange of DVD player and external equipment is used.

(3)

10,19,20 is connected with interface P0.0, P1.6, the P1.5 of MCU27 respectively in order, and MCU27 differentiates the classification of external equipment by the signal of this three signal line input according to external equipment.

(4)

11,12,13,14 is connected with interface P1.1, P3.0, P3.1, the P1.2 of MCU27 respectively in order, and MCU27 is by the inside and outside message exchange of this four signal line control.

(5) pin 15 be connected in the machine+the 5V power lead on.

(6) pin 16 closes capacitor C607 by the corner and is connected with commutation circuit 29 and is transported on the video output of output port 28 by the vision signal that commutation circuit 29 is imported external equipment thus.

(7) pin 17 closes capacitor C605 by the corner and is connected with commutation circuit 29 and is transported to by the audio frequency right-channel signals that commutation circuit 29 is imported external equipment thus on the audio frequency R channel delivery outlet of output port 28.

(8) pin 18 closes capacitor C602 by the corner and is connected with commutation circuit 29 and is transported to by the audio frequency left channel signals that commutation circuit 29 is imported external equipment thus on the audio frequency L channel delivery outlet of output port 28.

When pin 19 is a low level, pin 20 during for high level, MCU27 identification external equipment is 16 game cartridges.The DVD (digital video disk) machine core converts two group of 8 bit parallel data of height to from optical disc reading signal after servo-drive system, decompress(ion) section processes, MCU27 is by pin 11 output low levels, and pin 13 output reset signals allow external equipment reset.Then pin 11 keeps high level, and MCU27 carries 8 bit data signals by

2,3,4,5,6,7,8,9 to external equipment, send the least-significant byte data earlier, after send the most-significant byte data.When pin 13 is low level, be expressed as the least-significant byte data, otherwise when pin 13 is high level, then be expressed as the most-significant byte data.After having sent 16 bit data, on behalf of 16 bit data, low pulse of pin 12 outputs sent.External game cartridge is organized 16 bit data with this and is write its internal storage, with data downloaded after treatment, convert audio-video signal to, and respectively audio-video signal is transported to output port 28 by

16,17,18 by commutation circuit 29, connecting terminal can play games.Change CD and can see a film or sing OK a karaoke club ok as long as connect televisor on another output port this moment.

When pin 19 is a high level, pin 20 during for low level, MCU27 identification external equipment is 8 game cartridges.The principle of work of this moment is the same, the different just data of sending have only the least-significant byte data.When having sent the least-significant byte data, send a low pulse by pin 14, represent this to organize 8 bit data and sent.

When

19,20 was low level, MCU27 identification external equipment was the WINDOWS-CE operating platform.If external equipment will send data to video disc player, then earlier send request signal by pin 11, after video disc player removed answer signal by 13 of pins, external equipment can send data to video disc player by

2,3,4,5,6,7,8,9; If video disc player will be to external equipment sending data, then send request signal by pin 12 to external equipment earlier, treat that external equipment is beamed back answer signal by pin 14 after, again data are sent to external equipment by

2,3,4,5,6,7,8,9.At this moment external equipment connect that telephone wire just can surf the web, download message or transmitting-receiving E-mail, this moment, the user still can enjoy the function of former DVD player.

As shown in Figure 2, this versatile interface 30 can also adopt have 20 pins, profile, size and the general identical interface of 20 pin D type sockets (the moon), the annexation and the principle of work of its pin are the same.

Claims

1, a kind of DVD player main circuit board, having that it comprises that general DVD player has is servo, the circuit and the components and parts of decompress(ion), switching, output function, it is characterized in that it has increased by one and has had the versatile interface [26,30] of 20 pins at least and have one group of output port [28] that links to each other with external equipment audio-video signal incoming line, this versatile interface [26,30] is connected with external unit by the D type socket (yin, yang) with same pin, and the concrete connected mode of its pin and former circuit is as follows:

(1) pin 2,3,4,5,6,7,8,9 is connected with interface P2.0, P2.1, P2.2, P2.3, P2.4, P2.5, P2.6, the P2.7 of microprocessor (hereinafter to be referred as MCU) [27] respectively on the 8 interior bit data bus of the machine of being parallel in order, becomes 8 bit data bus that inside and outside message exchange is used;

(2) pin 11,12,13,14 in order respectively with MCU[27] interface P1.1, P3.0, P3.1, P1.2 be connected, as the control line of inside and outside message exchange;

(3) pin 15 be connected in the machine+the 5V power lead on;

(4) pin 16 closes capacitor C607 by the corner and receives on the commutation circuit [29], and is connected with the video output of output port [28], becomes external unit vision signal incoming line

(5) pin 17 closes capacitor C605 by the corner and receives commutation circuit [29]] on, and be connected with the audio frequency R channel delivery outlet of output port [28], external unit audio frequency right-channel signals incoming line become;

(6) pin 18 closes capacitor C602 by the corner and receives on the commutation circuit [29], and is connected with the audio frequency L channel delivery outlet of output port [28], becomes external unit audio frequency left channel signals incoming line;

(7) pin 10,19,20 in order respectively with MCU[27] interface P0.0, P1.6, P1.5 be connected, become the signal wire that DVD player is differentiated the external equipment classification;

(8) other pin difference ground wire.

2, according to the described DVD player main circuit board of claim 1, it is characterized in that this versatile interface [26] for having 25 pins, its profile, size are identical with 25 general pin D type sockets (the moon).

3, according to the described DVD player main circuit board of claim 1, it is characterized in that this versatile interface [30] for having 20 pins, its profile, size are identical with 20 general pin D type sockets (the moon).

4, connect according to claim 1 or 2 or 3 described DVD player main circuit boards, the pin 19 that it is characterized in that this versatile interface [26,30] is high level for low level, pin 20, MCU[27] the identification external equipment is 16 game cartridges, this moment being expressed as follows of each control line signal:

(1) during pin 11 low levels, pin 13 sends reset signal to external equipment, during pin 11 high level, MCU[27] by 8 bit data bus to the external equipment write data;

(2) pin 12 sends a low pulse signal to external equipment, represents 16 bit data to send;

What (3) represent during pin 13 low levels to carry to external equipment by 8 bit data bus is the least-significant byte data, then is expressed as the most-significant byte data during high level;

(4) pin 14 is vacant.

5, according to claim 1 or 2 or 3 described DVD player main circuit boards, the pin 19 that it is characterized in that this versatile interface [26,30] is for high level, when pin 20 is low level, MCU[27] to connect equipment be 8 game cartridges in identification place, this moment, each control line signal was expressed as follows:

(2) pin 12 is vacant;

(3) pin 13 is a low level, and the expression data of sending are the least-significant byte data;

(4) pin 14 sends a low pulse signal to external equipment, represents 8 bit data to send.

6, according to the main circuit board of claim 1 or 2 or 3 described DVD player, the pin [19,20] that it is characterized in that this versatile interface [26,30] is when being low level, MCU[27] identification external equipment be the WINDOWS-CE operating platform, this moment each control line be expressed as follows:

(1) pin 11 is the request signal line of external equipment to the DVD player input information;

(2) pin 12 is the solicited message line of DVD player to external equipment output information;

(3) pin 13 is the acknowledge signal line of DVD player;

(4) pin 14 is the acknowledge signal line of external equipment.