CN2891529Y - Set-top box - Google Patents
Set-top box Download PDFInfo
- Publication number
- CN2891529Y CN2891529Y CNU2006200798525U CN200620079852U CN2891529Y CN 2891529 Y CN2891529 Y CN 2891529Y CN U2006200798525 U CNU2006200798525 U CN U2006200798525U CN 200620079852 U CN200620079852 U CN 200620079852U CN 2891529 Y CN2891529 Y CN 2891529Y
- Authority
- CN
- China
- Prior art keywords
- top box
- smart card
- chip
- circuit
- electrical circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Storage Device Security (AREA)
Abstract
The utility discloses a set-top box comprising a main chip and a direct current supply. A chip electrical circuit of a smart card is positioned in the main board of the set-top box, thereby transplanting information stored in the smart card into the chip electrical circuit of the smart card. The main chip outputs data signals, clocked signals and reset signals through an I/O port, thereby visiting directly the chip electrical circuit of the smart card and realizing conditional access function of the set-top box. A smart card reader-writer in the electrical circuit of an original set-top box and the control wiring chip TD8004 are saved, thereby simplifying circuit organization effectively and reducing the system cost. In addition, detection of a smart card inserted is not necessary, the losses and damaging made by pulling and inserting the smart card can be avoided, and the security of the main system can be improved. The invention is applicable to an electrical circuit of an economical set-top box.
Description
Technical field
The utility model relates to a kind of improvement of set-top box circuit, specifically, relates to a kind of smart card circuitry that is used for the condition receiver top box.
Background technology
At present, general set-top-box system adopts smart card realization condition receiving function more, comprise smart card smart card (also claiming IC-card), smart card intelligent card, microcircuit card microcircuit card and chip card, all be a microelectronic chip to be embedded in the card base that meets ISO 7816 standards make card form, and then be inserted into the condition receiving function of realizing set-top box in the set-top box socket.The read-write operation of general intelligence card is to be that read write line realizes that its main circuit structure is referring to shown in Figure 1 by intelligent card socket.Data-signal SC_DATA, the clock signal SC_CLK, reset signal SC_RST, detection signal SC_SW and the power control signal SC_PWR that export from the special I/O mouth of master chip are connected to the intelligent card read/write device by card reader control circuit chip TDA8004, smart card is inserted in the read write line, in smart card, recover the control word of encrypting traffic, control word is sent to the descrambling work of finishing data flow in the master chip subsequently, and qualified audio-video signal is exported by television for play.The sort circuit infrastructure cost height of set-top box is realized complexity, need set up the auxiliary realization of special card reader and control circuit chip TDA8004, therefore is not suitable in the economical set-top box circuit.And often the plug smart card also may cause the damage of smart card and lose, thereby has reduced the fail safe of machine system.
Summary of the invention
The utility model is in order to solve the problem of smart card of set-top box circuit structure complexity, cost height, poor stability in the prior art, a kind of novel intelligent card of set-top box circuit is provided, by built-in intelligence the core of the card sheet circuit on the set-top box mainboard, card reader and control circuit chip TDA8004 have been saved, thereby effectively simplified circuit structure, reduced system cost.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of set-top box, comprise master chip and DC power supply, data-signal, clock signal and the reset signal of described master chip output is connected respectively to I/O mouth, clock end and the reset terminal of an intelligent card chip circuit, and described DC power supply provides working power for the intelligent card chip circuit.
As further qualification to technique scheme, described master chip is by its I/O mouth outputting data signals, clock signal and reset signal, and then with corresponding connection of I/O mouth, clock end and reset terminal of intelligent card chip circuit, it is the integrated chip realization of STWM34B that described intelligent card chip circuit adopts a model, and its clock end is connected described DC power supply through pull-up resistor respectively with reset terminal.
Compared with prior art, advantage of the present utility model and good effect are: the utility model is by built-in intelligence the core of the card sheet circuit on the set-top box mainboard, information in the smart card is transplanted in the described intelligent card chip circuit, master chip is directly visited the intelligent card chip circuit by its I/O mouth, realizes the condition receiving function of set-top box.This circuit has saved intelligent card read/write device and control circuit chip TDA8004, thereby effectively simplified circuit structure, reduced system cost, and no longer need detecting whether to insert smart card, having removed smart card that the plug smart card caused from damages and loses, improved the fail safe of machine system, be applicable in the Eco-power set-top box circuit.
Description of drawings
Fig. 1 is the schematic diagram of intelligent card of set-top box circuit in the prior art;
Fig. 2 is the schematic diagram of intelligent card of set-top box circuit in the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.
Intelligent card of set-top box circuit of the present utility model is realized the condition receiving function of set-top box by built-in intelligence the core of the card sheet circuit on the set-top box mainboard, and its physical circuit annexation is referring to shown in Figure 2.
Among Fig. 2, data-signal SC_DATA from the special I of master chip/O mouth output, clock signal SC_CLK and reset signal SC_RST are connected respectively to the I/O mouth of intelligent card chip circuit STWM34B, clock end CLK and reset terminal RST, described clock end CLK and reset terminal RST are respectively through pull-up resistor R107, R108 connection+5V DC power supply, described+5V DC power supply is provided by the set-top box internal circuit board, through capacitor C 006, C007 carries out being connected to after the Filtering Processing power end VCC of intelligent card chip circuit STWM34B, and STWM34B provides working power for the intelligent card chip circuit.Data message in original smart card is transplanted among the described intelligent card chip circuit STWM34B, master chip can be realized its condition receiving function by visit intelligent card chip circuit STWM34B, and qualified audio-video signal is shown by television set output.
Intelligent card of set-top box circuit of the present utility model is owing to no longer need detecting whether to insert smart card, so the detection signal SC_SW and the power control signal SC_PWR that do not need master chip to send, and intelligent card read/write device and control circuit chip TDA8004 in original set-top box circuit have been saved, thereby effectively simplified circuit structure, reduced system cost, remove smart card that the plug smart card caused from and damaged and lose, improved the fail safe of machine system.
The utility model adopts above-mentioned simple circuit configuration to realize the condition receiving function of set-top box; certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example; variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.
Claims (4)
1. set-top box, comprise master chip and DC power supply, it is characterized in that: data-signal, clock signal and the reset signal of described master chip output are connected respectively to I/O mouth, clock end and the reset terminal of an intelligent card chip circuit, and described DC power supply provides working power for the intelligent card chip circuit.
2. set-top box according to claim 1 is characterized in that: described master chip is by its I/O mouth outputting data signals, clock signal and reset signal, so with corresponding connection of I/O mouth, clock end and reset terminal of intelligent card chip circuit.
3. set-top box according to claim 2 is characterized in that: the clock end of described intelligent card chip circuit is connected described DC power supply through pull-up resistor respectively with reset terminal.
4. set-top box according to claim 3 is characterized in that: it is the integrated chip realization of STWM34B that described intelligent card chip circuit adopts a model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200798525U CN2891529Y (en) | 2006-01-01 | 2006-01-01 | Set-top box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200798525U CN2891529Y (en) | 2006-01-01 | 2006-01-01 | Set-top box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2891529Y true CN2891529Y (en) | 2007-04-18 |
Family
ID=38022188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200798525U Expired - Fee Related CN2891529Y (en) | 2006-01-01 | 2006-01-01 | Set-top box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2891529Y (en) |
-
2006
- 2006-01-01 CN CNU2006200798525U patent/CN2891529Y/en not_active Expired - Fee Related
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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: 20070418 Termination date: 20100201 |