CN201025721Y - A circuit for realizing TV set software upgrade - Google Patents
A circuit for realizing TV set software upgrade Download PDFInfo
- Publication number
- CN201025721Y CN201025721Y CNU2007201185532U CN200720118553U CN201025721Y CN 201025721 Y CN201025721 Y CN 201025721Y CN U2007201185532 U CNU2007201185532 U CN U2007201185532U CN 200720118553 U CN200720118553 U CN 200720118553U CN 201025721 Y CN201025721 Y CN 201025721Y
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- vga
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Abstract
The utility model discloses a circuit for realizing the software upgrade of TV set, which comprises a switch chip. Two pairs of input and output pins of the switch chip are controlled and communicated by a pin control. Two input pins are connected on a general interface of the TV set and two output pins are connected on SDA bus of SCL of the IIC bus of the TV set for realizing the software upgrade of the TV set. The utility model applies the switch chip and the upgrade circuit which are connected with the IIC bus of the TV set for realizing the software upgrade and the circuit is simple and the operation is convenient and the upgrade is fast.
Description
Technical field
The utility model relates to a kind of circuit of television set, in particular a kind of circuit that is applied to conveniently its software be carried out on the television set updating operation.
Background technology
Along with the progress and the development of science and technology, software occupies more and more important position at whole system for TV set.The no matter exploitation of television set, debugging all will be carried out the upgrading and the renewal of software to such an extent as to produce maintenance.Current upgrade method mostly is to open television rear cover earlier, and parallel port or the serial ports by computer carries out the upgrading and the renewal work of software by the upgrade interface that 4 needle interfaces are connected to television set then.Such implementation method complicated operation is lost time, and is unfavorable for the repairman of basic unit operation, the complicated operation the during upgrade maintenance after dispatching from the factory especially, updating operation inconvenience.
Correlation technique by television set general-purpose interface ROMPaq is also arranged at present, for example publication number is disclosed by AV interface, YCbCr interface in the patent documentation of CN1774050A, but this method need be used relay, and the cost height can not be realized the bus level conversion; And when original software breaks down can't accept remote command the time, the scheme that patent CN1774050A proposed has just lost meaning.
The present invention just is being based on above background and a kind of reliable and stable, simple to operate, upgrade method and the circuit fast and easily that design.
The utility model content
The purpose of this utility model is to provide a kind of circuit of realizing TV set software upgrade, by the switch chip is connected with the television set iic bus and the circuit of upgrading are set, realize a kind of simple to operate, the conveniently TV set software upgrade realization circuit of upgrading.
The technical solution of the utility model comprises:
A kind of circuit of realizing TV set software upgrade, it is characterized in that, comprise a switch chip, two pairs of input and output pins of this switch chip are communicated with by enable pin control, two input pins are connected on the general-purpose interface of this television set, two output pins are connected on the SCL and SDA bus of described television set iic bus, are used to realize the upgrading of software in the television set.
Described circuit, wherein, described general-purpose interface is the VGA interface, and described enable pin and two input pins connect a stitch of this VGA interface respectively.
Described circuit, wherein, the enable pin of described switch chip also is connected with a negative circuit, and when software upgrading, makes the VGA interface pin ground connection that connects this enable pin, described enable pin.
Described circuit, wherein, described negative circuit comprises a NPN triode, on the anti-phase enable pin of receiving described switch chip, but its base stage connects the correspondence ground pin of described VGA interface.
Described circuit, wherein, described switch chip is the PCA9306 chip, and has the bus level translation function.
A kind of circuit of realizing TV set software upgrade provided by the utility model owing to adopted the switch chip that is connected with the television set iic bus and upgrading circuit, its circuit structure is simple, easy to operate, upgrade faster.
Description of drawings
Fig. 1 is the VGA stitch distribution schematic diagram on the television set in the circuit of realization TV set software upgrade of the present utility model;
Fig. 2 is the circuit connection diagram of external update device of the present utility model;
Fig. 3 is system switching circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, will be described in more detail each preferred embodiment of the present utility model.
A kind of circuit of realizing TV set software upgrade of the present utility model, as shown in Figure 3, comprise a switch chip 110, this switch chip can adopt the PCA9306 chip, 5,6 and two pairs of output pins of its two pairs of input pins 4,3 are communicated with by an enable pin 8 controls, two input pins 5,6 are connected respectively on the general-purpose interface of this television set, as shown in Figure 1, can adopt two stitch 12,15 of VGA interface, two output pins 4,3 are connected on the iic bus SCL and SDA bus of described television set, are used to realize the upgrading of software in the television set.
The circuit of realization TV set software upgrade of the present utility model is controlled the connection respectively of above-mentioned two pairs of input and output pins by described enable pin, thereby upgrade data can be imported by iic bus when needs carry out software upgrading; When normal use rather than software upgrading, disconnect when controlling above-mentioned two pairs of input and output pins, thereby do not influence the transfer of data of normal operating condition by described enable pin.
The general-purpose interface of described television set can adopt the VGA interface, as depicted in figs. 1 and 2, the stitch arrangement mode of VGA interface is a standard, the enable pin that described switch chip is set is by negative circuit control, on the male of the VGA of correspondence interface software upgrading, stitch in corresponding stitch such as the present embodiment 11 is set to ground connection, like this when needs carry out software upgrading, with the male of VGA interface with after female is connected, stitch 11 is a ground connection, on enable pin 8, produce high level by negative circuit, thereby connect two pairs of input and output pins, finish software upgrade process.
As shown in Figure 1, the utility model VGA interface pin is defined as follows: 1 red primary red; 2 green primary green; 3 blue primary blue; 4 address code ID Bit; 5 self-tests (each family's definition is different); 6 red ground; 7 greenery patchess; 8 blue ground; 9 keep (each family's definition is different); 10 digitally; 11 address codes; 12 address codes; 13 row synchronously; 14 field synchronizations; 15 address codes (each family's definition is different).
What adorn on the television main plate is the VGA female seat, and wherein stitch 11 is unsettled, and stitch 12 is the EDID data pin (SDA) of VGA, and stitch 15 is the EDID clock pin (SCL) of VGA, and the utility model utilizes these three stitch to come the software of television set is upgraded.
Its circuit as shown in Figure 3, utilized a switch chip PCA9306, stitch 11 is connected to the enable pin of PCA9306 by a negative circuit, when needing software upgrading with the stitch 11 of VGA interface by external upgrade interface ground connection, make the stitch 12 of VGA interface be connected with SDA, the SCL of the iic bus of mainboard by PCA9306, so that carry out transfer of data and upgrading with stitch 15; In operate as normal, as when needing video playback, above-mentioned switch chip then is in off-state.
Realization of the present utility model as shown in Figure 2, four needle interfaces of traditional upgrading television set are received on the male of a VGA interface socket, and make stitch 11 ground connection of this VGA male, so that when male and female are adaptive, the stitch 11 of female is ground connection also, and the stitch 12 and the stitch 15 of male is connected respectively on the corresponding data transmission interface.The connection layout that is traditional 4 needle interfaces to the VGA male shown in Figure 2 can be made into pcb board as a module, only needs to be inserted into when upgrading on the VGA female seat of mainboard to get final product.
External upgrading module of the present utility model is by the connection of traditional 4 cores upgrading pin to the male of VGA interface, connection layout as shown in Figure 2, the SCL pin of upgrade interface is connected to the stitch 15 of VGA male, and the SDA pin is connected to the stitch 12 of VGA male, stitch 11 ground connection of VGA interface male; U001 is a LM7805 chip, and the operating voltage that is used to produce 5V offers the IC of upgrading module (as the 74LS05 chip that is transformed into the IIC level by computer parallel port etc.).
On the motherboard of television set, add simultaneously a bus converting circuit, switch chip in this circuit adopts the PCA9306 chip of TI company to realize, and have the function of bus level conversion, utilize the stitch 11 of VGA female seat on the motherboard to control the enable pin of PCA9306 chip.When needs carry out upgrade software, the male of plugging the VGA interface makes the also ground connection of stitch 11 of VGA female seat on the motherboard, and make that by a negative circuit enable pin of PCA9306 chip is a high potential, then the PCA9306 switch chip is in connection status, and just can directly carry out software upgrading by the VGA interface to the Flash chip on the motherboard this moment.When not upgrading at ordinary times, the male of VGA interface is not inserted on the VGA female seat, and the PCA9306 switch chip is in off-state, does not influence the operate as normal of motherboard.
The switching circuit that the utility model PCA9306 chip controls VGA female seat connects to the system iic bus as shown in Figure 3, on the television main plate, the stitch 11,12 of VGA female seat, the 15th, the usefulness that is used for upgrading, other stitch keep original annexation to handle as the VGA normal signal using.Stitch 11 is by the anti-phase enable pin 8 of receiving the PCA9306 chip of NPN triode Q1, in order to the operating state of control PCA9306.The stitch 12 and 15 of VGA female seat is SDA and the SCL pin of VGA interface EDID data EEPROM, when at the upgrading TV set software time, after the male VGA of external update device pcb board is inserted on the VGA female seat, the stitch 11 of VGA interface is received on the ground by external update device pcb board, the enable pin 8 of the anti-phase PCA9306 of making of process triode Q1 becomes high level, and 5V voltage provides reference voltage VREF by resistance R 3, R4 for the pin 7 of PCA9306 simultaneously.This moment, 5 pin and 4 pin of PCA9306 were in connection status, and 6 pin and 3 pin are in connection status, realized the conversion (Yi Bian be 5V, Yi Bian be 3.3V) of bus level voltage simultaneously by PCA9306.
Upgrade software is input to the interface CN002 of external update device pcb board, so just can enters the SCL of iic bus and the software of SDA upgrading system for TV set to software by VGA female seat, PCA9306 chip etc. by this device.After upgrading is finished, extract external update device pcb board, the stitch 11 of VGA female seat is drawn high by resistance R 7 by 5V on TV motherboard this moment so, the pin 7 of PCA9306 and 8 is an electronegative potential after triode Q1 is anti-phase, switch chip is in off-state, do not influence the proper communication of VGA interface and EDID data this moment, but system's operate as normal.
The process that the circuit of realization TV set software upgrade of the present utility model carries out software upgrading is as follows:
The VGA male of update device (pcb board as shown in Figure 1) is inserted on the VGA female seat of television set; Software signal to be upgraded is input to update device, and this moment, the stitch 12 and the stitch 15 of VGA interface were connected to the iic bus of system by the PCA9306 chip, directly carried out the software upgrading operation of television set, and upgrade data is written in the system for TV set chip.
After the utility model TV set software upgrade finishes, update device to be extracted, the stitch 12 of VGA interface and stitch 15 disconnect with the iic bus of system thereupon.After system for TV set is restarted in the pass power down, can finish whole upgrade process.
Compared with prior art, the utility model realizes that the circuit of TV set software upgrade utilizes VGA interface or other general-purpose interfaces, only needs three holding wires, and two are used for being connected by the iic bus of PCA9306 and system; Another root is controlled as enable pin, and ground connection just can make that PCA9306 is in connected state after plugging the update device pcb board, and it is simple in structure, and is swift and convenient to operate.
Because PCA9306 chip of the present utility model has the bus voltage handoff functionality, can realize 5V to 3.3V, 5V is to 1.8V, and 3.3V has ensured the stability and the reliability of the utility model software upgrading to the switching of 1.8V or the like different bus voltage.
This upgrade interface of the present utility model is not limited to the VGA port, also can be other TV general-purpose interfaces.Definite saying so only needs three holding wire (YPBPR interfaces, AV+L+R or the like interface), two are used for being connected by the iic bus of PCA9306 and system, and another root gets final product as enable pin, and ground connection makes PCA9306 be in connected state after plugging the update device pcb board.The utility model circuit operation simple and fast has been simplified the operating process of upgrading TV set software greatly, and bus level conversion has simultaneously guaranteed the reliable and stable of upgrading, and it realizes simple, and is with low cost.
Should be understood that above-mentioned description at specific embodiment is comparatively detailed, can not therefore think the restriction to the utility model scope of patent protection, scope of patent protection of the present utility model should be as the criterion with claims.
Claims (5)
1. circuit of realizing TV set software upgrade, it is characterized in that, comprise a switch chip, two pairs of input and output pins of this switch chip are communicated with by enable pin control, two input pins are connected on the general-purpose interface of this television set, two output pins are connected on the SCL and SDA bus of described television set iic bus, are used to realize the upgrading of software in the television set.
2. circuit according to claim 1 is characterized in that, described general-purpose interface is the VGA interface, and described enable pin and two input pins connect a stitch of this VGA interface respectively.
3. circuit according to claim 2 is characterized in that the enable pin of described switch chip also is connected with a negative circuit, and when software upgrading, makes the VGA interface pin ground connection that connects this enable pin, described enable pin.
4. circuit according to claim 3 is characterized in that, described negative circuit comprises a NPN triode, and on the anti-phase enable pin of receiving described switch chip, but its base stage connects the correspondence ground pin of described VGA interface.
5. circuit according to claim 3 is characterized in that described switch chip is the PCA9306 chip, and has the bus level translation function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201185532U CN201025721Y (en) | 2007-02-08 | 2007-02-08 | A circuit for realizing TV set software upgrade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201185532U CN201025721Y (en) | 2007-02-08 | 2007-02-08 | A circuit for realizing TV set software upgrade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201025721Y true CN201025721Y (en) | 2008-02-20 |
Family
ID=39099576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201185532U Expired - Fee Related CN201025721Y (en) | 2007-02-08 | 2007-02-08 | A circuit for realizing TV set software upgrade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201025721Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102388364A (en) * | 2009-02-27 | 2012-03-21 | 萨基姆通讯宽带公司 | Methods of diagnosis and/or updating of software of an electronic device equipped with a connector of hdmi type and associated device |
| CN110380719A (en) * | 2018-04-13 | 2019-10-25 | 合肥杰发科技有限公司 | Data transmission circuit, control system and the control device of chip |
-
2007
- 2007-02-08 CN CNU2007201185532U patent/CN201025721Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102388364A (en) * | 2009-02-27 | 2012-03-21 | 萨基姆通讯宽带公司 | Methods of diagnosis and/or updating of software of an electronic device equipped with a connector of hdmi type and associated device |
| CN102388364B (en) * | 2009-02-27 | 2015-11-25 | 萨基姆通讯宽带公司 | The method that diagnosis and/or renewal are equipped with the software of the electronic equipment of the connector of HDMI type and the equipment be associated |
| CN110380719A (en) * | 2018-04-13 | 2019-10-25 | 合肥杰发科技有限公司 | Data transmission circuit, control system and the control device of chip |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080220 Termination date: 20110208 |