CN208863014U - A kind of one-to-many set-top box burning update device of master slice - Google Patents
A kind of one-to-many set-top box burning update device of master slice Download PDFInfo
- Publication number
- CN208863014U CN208863014U CN201821163931.3U CN201821163931U CN208863014U CN 208863014 U CN208863014 U CN 208863014U CN 201821163931 U CN201821163931 U CN 201821163931U CN 208863014 U CN208863014 U CN 208863014U
- Authority
- CN
- China
- Prior art keywords
- foot
- connects
- master slice
- resistance
- top box
- 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.)
- Active
Links
Landscapes
- Electronic Switches (AREA)
Abstract
The utility model discloses a kind of one-to-many set-top box burning update devices of master slice, it is characterized by: including AND gate circuit, two groups of unilateral gates and several envelope eapsulotomy circuits, the input terminal of AND gate circuit connects burning master slice, the output end of AND gate circuit U3 is separately connected the input terminal of two groups of unilateral gates, the input terminal of each envelope eapsulotomy circuit is connect with an output end of unilateral gate or unilateral gate, and the output end of each envelope eapsulotomy circuit is connect with set-top box.Master slice is carried out software burning upgrading simultaneously to multiple set-top boxes by circuit parallel by the utility model, substantially increases set-top box burning upgrading to efficiency.
Description
Technical field
The utility model relates to a kind of update device, especially a kind of one-to-many set-top box burning update device of master slice.
Background technique
Digital video switching box (English: Set Top Box, abbreviation STB), commonly referred to as box on set-top box or machine, are one
The equipment of a connection television set and outside source.The digital signal of compression can be changed into television content by it, and in television set
On show.Signal can come from wire cable, satellite antenna, broadband network and terrestrial broadcasting.In set-top box is received
Appearance is more that digital content can be received, including electronic programming refers to other than the image that simulated television can provide, sound
South, internet webpage, subtitle etc..Enable users to watch digital television program on existing television set, and can by network into
The amusement of row interactive digitalization, education and commercialization activity.
There are many software burning modes of existing set-top box (STB) manufacturing enterprise, and part type is related to through master slice pair
The mode of copying carries out burning, and it is very low to efficiency when copying to carry out master slice by 1 pair of 1 mode, under productivity.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of one-to-many set-top box burning update devices of master slice, mention
High set-top box software burning efficiency.
In order to solve the above technical problems, the technical scheme adopted by the invention is that:
A kind of one-to-many set-top box burning update device of master slice, it is characterised in that: include AND gate circuit, two groups of unilateral gate electricity
The input terminal of road and several envelope eapsulotomy circuits, AND gate circuit connects burning master slice, and the output end of AND gate circuit U3 is separately connected
One of the input terminal of two groups of unilateral gates, the input terminal of each envelope eapsulotomy circuit and unilateral gate or unilateral gate
Output end connection, the output end of each envelope eapsulotomy circuit are connect with set-top box.
Further, the AND gate circuit include 74HC08D chip U3, U3 VVC foot connect power supply VCC, the A1 of U3,
B1, A2, B2 foot connect 3 feet of master slice connector J1, the 1 foot ground connection of master slice connector J1, the GND foot ground connection of U3.
Further, two groups of unilateral gates are respectively 74HC245D chip U1 and 74HC245D chip U2, U1's
A1-A8 foot is connect with the one end resistance R2, and the resistance R2 other end connects the Y2 foot of U3, GND foot and OE the foot ground connection of U1, the VCC of U1
Foot connects power supply VCC, and the B5-B8 foot of U1 is separately connected four input terminals for turning exclusion RS1, the A1-A8 foot and resistance R1 mono- of U2
End connection, the resistance R1 other end connect the Y1 foot of U3, GND foot and OE the foot ground connection of U2, and the VCC foot of U2 connects power supply VCC, U2's
B5-B8 foot is separately connected four input terminals for turning exclusion RS2.
Further, the envelope eapsulotomy circuit includes that the C foot of 6N137 optical coupling isolator N1, N1 are grounded, the GND foot of N1
Digitally, an output end of the A foot connection RS1 or RS2 of N1, the VCC foot of N1 connects the one end resistance R3,74HC14D core for connection
The end VCC of piece U4, the anode of patch capacitor C1, the one end capacitor C2,1 foot of interface J2 and the one end resistance R5, the VO foot connection of N1
The GND foot of the 1A foot of the resistance R3 other end and U4, U4 connects digitally, and the 1Y foot of U4 connects the one end resistance R4, the resistance R4 other end
3 feet of 2 feet of connecting interface J2, interface J2 connect digitally, and the anode of the other end connection light emitting diode D1 of resistance R5 shines
The cathode of diode D1 connects digitally.
Further, the power supply VCC is generated by power circuit, and power circuit includes 2,3 feet of 5V power outlet DC, DC
Ground connection, the anode of the 1 foot connection diode D2 of DC, the anode of the cathode connection electrolytic capacitor C3 of diode D2, the one end capacitor C4
And the cathode of out-put supply VCC, electrolytic capacitor C3 and the other end of capacitor C4 are grounded.
The utility model compared with prior art, has the following advantages that and effect: master slice a pair of multimachine of the utility model
Master slice is carried out software burning upgrading simultaneously to multiple set-top boxes by circuit parallel by top box burning update device, is substantially increased
Set-top box burning upgrading to efficiency, by expand can by original 3 minutes 1 improve for 3 minutes 8 it is even more.
Detailed description of the invention
Fig. 1 is a kind of module map of the one-to-many set-top box burning update device of master slice of the utility model.
Fig. 2 is a kind of circuit diagram of the one-to-many set-top box burning update device of master slice of the utility model.
Fig. 3 is the circuit diagram of the AND gate circuit of the utility model.
Fig. 4 is the circuit diagram of the envelope eapsulotomy circuit of the utility model.
Fig. 5 is the circuit diagram of the power circuit of the utility model.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
As shown in Figure 1, a kind of one-to-many set-top box burning update device of master slice of the utility model, comprising AND gate circuit,
The input terminal of two groups of unilateral gates and several envelope eapsulotomy circuits, AND gate circuit connects burning master slice, and AND gate circuit U3's is defeated
Outlet is separately connected the input terminal of two groups of unilateral gates, the input terminal and unilateral gate of each envelope eapsulotomy circuit or unidirectional
One output end of gate circuit connects, and the output end of each envelope eapsulotomy circuit is connect with set-top box.
As shown in Figures 2 and 3, AND gate circuit include 74HC08D chip U3, U3 VVC foot connect power supply VCC, the A1 of U3,
B1, A2, B2 foot connect 3 feet of master slice connector J1, the 1 foot ground connection of master slice connector J1, the GND foot ground connection of U3.
Two groups of unilateral gates are respectively the A1-A8 foot and electricity of 74HC245D chip U1 and 74HC245D chip U2, U1
The connection of the one end R2 is hindered, the resistance R2 other end connects the Y2 foot of U3, GND foot and OE the foot ground connection of U1, and the VCC foot of U1 connects power supply
The B5-B8 foot of VCC, U1 are separately connected four input terminals for turning exclusion RS1, and A1-A8 foot of U2 is connect with the one end resistance R1, electricity
The Y1 foot of R1 other end connection U3, GND foot and OE the foot ground connection of U2 are hindered, the VCC foot of U2 connects power supply VCC, the B5-B8 foot point of U2
Four input terminals of exclusion RS2 Lian Jie not turned.
As shown in figure 4, the C foot that envelope eapsulotomy circuit includes 6N137 optical coupling isolator N1, N1 is grounded, the GND foot connection of N1
Digitally, an output end of the A foot connection RS1 or RS2 of N1, the VCC foot of N1 connect the one end resistance R3,74HC14D chip U4
The end VCC, patch capacitor C1 anode, the one end capacitor C2,1 foot of interface J2 and the one end resistance R5, the VO foot of N1 connects resistance
The GND foot of the 1A foot of the R3 other end and U4, U4 connects digitally, and the 1Y foot of U4 connects the one end resistance R4, the connection of the resistance R4 other end
3 feet of 2 feet of interface J2, interface J2 connect digitally, the anode of the other end connection light emitting diode D1 of resistance R5, light-emitting diodes
The cathode of pipe D1 connects digitally.Capacitor C2 is 100uF electrolytic capacitor, and patch capacitor C1 is 20nf patch capacitor.
As shown in figure 5, power supply VCC is generated by power circuit, power circuit includes that 2,3 feet of 5V power outlet DC, DC connect
Ground, the anode of the 1 foot connection diode D2 of DC, the cathode of diode D2 connect the anode of electrolytic capacitor C3, the one end capacitor C4 simultaneously
The cathode of out-put supply VCC, electrolytic capacitor C3 and the other end ground connection of capacitor C4.
By 5V power supply after diode D2 one-way conduction by C3, C4 filter height frequency point clutter, then to U1, U2,
The VCC foot of tri- driving circuit devices of U3 is powered, and the GND foot of U1, U2, U3, J1, DC and the C foot of N1 connect power ground, master slice simultaneously
Subrack is inserted in J1 by 4PIN Serial Port Line, and 3 mouthfuls of J1 are used as STB-IN mouthfuls of reception upgrade informations；Connect U3's by 3 mouthfuls of J1
A1, A2, B1, B2 mouthfuls, the AND gate circuit relationship of 74HC08D is utilized, i.e. A1, when B1 is high level, Y1 just has output；Together
Reason: when A2, A3 are high level, Y2 just has output；Y1, Y2 pass through R1 respectively, and R2 accesses the A1-A8 foot of U1 and U2 and company, real
It now expands, when the one-way transmission principle of 74HC245D, i.e. DIR foot access 5V power supply high level is utilized, data are transmitted by A="
The effect of B, OE ground connection is that enabled foot low level keeps the device in running order；Then by B5-B8 output pin respectively and
Data are delivered separately to 6 optical coupling isolators after connecting by RS1 with RS2 exclusion current limliting.
J2 accesses the 3PIN Serial Port Line of to-be-detected machine, and the 5V power supply that 1 foot to-be-detected machine provides, 2 feet are data receiver foot, D1
The effect of lamp is to access to-be-detected machine lamp and light to illustrate that power supply is normal.
There is-C2 the decoupling capacitor of a 100uF by the VCC foot of N1 photo-coupler.The use of 6N137 photo-coupler needs
Pay attention to two o'clock: first is that the VO foot output circuit of 6N137 photo-coupler belongs to open collector circuit, it is therefore desirable to pull up one
200 Ω resistance connect VCC；Second be a LED between the A foot of 6N137 photo-coupler and C foot, therefore A foot must concatenate
One RS1 current-limiting resistance, C foot connect power ground and make internal forward conduction.
The signal of 6n137 is inputted from A foot, and interior light emitting diodes shine, and optical channel passes to photodiode in piece, instead
It is connected after to the photosensitive tube illumination of biasing, an input terminal with door is sent to after current-voltage is converted, it is defeated with another of door
Enter for enable end, when VE foot is Gao Shiyu output high level, the low electricity of photoisolator VO output after output triode is reversed
It is flat.When current input signal is less than activation threshold value or enable end is low, VO exports high level, but it is collector that this is logically high
Open circuit, pull-up resistor or voltage-regulating circuit can be added for circuit is received.It is envelope eapsulotomy by this conversion basic goal, drop
It makes an uproar, it is ensured that the accuracy of serial communication, will appear data transmission packet loss if without this device causes master slice to copying failure.
The 1A foot of VO foot signal output access U4, U4 74HC14D, i.e., non-gate driver, if 1A input is high level, 1Y
Output is then low level；If 1A input is low level, 1Y output is low level；Signal is carried out reversely, essence is construed to letter
After number being imported by exclusion RS1 by N1 reversely using U4 it is reversed after two negatives make a positive, signals revivification passes through the R5 current limliting of 330 Ω
Resistance is transferred to to-be-detected machine by 2 feet of J2, final to realize master slice and to-be-detected machine to copying function.
Above content is only illustrations made for the present invention described in this specification.Technology belonging to the present invention
The technical staff in field can do various modifications or supplement or is substituted in a similar manner to described specific embodiment, only
It should belong to guarantor of the invention without departing from the content or beyond the scope defined by this claim of description of the invention
Protect range.
Claims (5)
1. a kind of one-to-many set-top box burning update device of master slice, it is characterised in that: include AND gate circuit, two groups of unilateral gates
Burning master slice is connected with the input terminal of several envelope eapsulotomy circuits, AND gate circuit, the output end of AND gate circuit U3 is separately connected two
One of the input terminal of group unilateral gate, the input terminal of each envelope eapsulotomy circuit and unilateral gate or unilateral gate is defeated
Outlet connection, the output end of each envelope eapsulotomy circuit are connect with set-top box.
2. the one-to-many set-top box burning update device of a kind of master slice described in accordance with the claim 1, it is characterised in that: described and door
Circuit includes that the VVC foot of 74HC08D chip U3, U3 connect power supply VCC, and A1, B1, A2, B2 foot of U3 connects the 3 of master slice connector J1
Foot, the 1 foot ground connection of master slice connector J1, the GND foot ground connection of U3.
3. the one-to-many set-top box burning update device of a kind of master slice according to claim 2, it is characterised in that: described two groups
Unilateral gate is respectively that A1-A8 foot of 74HC245D chip U1 and 74HC245D chip U2, U1 are connect with the one end resistance R2,
The resistance R2 other end connects the Y2 foot of U3, GND foot and OE the foot ground connection of U1, and the VCC foot of U1 connects power supply VCC, the B5-B8 foot of U1
Four input terminals for turning exclusion RS1 are separately connected, A1-A8 foot of U2 is connect with the one end resistance R1, and the resistance R1 other end connects U3
Y1 foot, GND foot and OE the foot ground connection of U2, the VCC foot of U2 connects power supply VCC, and the B5-B8 foot of U2, which is separately connected, turns exclusion RS2
Four input terminals.
4. the one-to-many set-top box burning update device of a kind of master slice described in accordance with the claim 3, it is characterised in that: the signal
Fidelity circuit includes that the C foot of 6N137 optical coupling isolator N1, N1 are grounded, and digitally, the A foot of N1 connects RS1 for the GND foot connection of N1
Or an output end of RS2, the VCC foot of N1 are connecting the one end resistance R3, the end VCC of 74HC14D chip U4, patch capacitor C1 just
Pole, the one end capacitor C2,1 foot of interface J2 and the one end resistance R5, the 1A foot of VO foot connection the resistance R3 other end and U4 of N1, U4's
GND foot connects digitally, and the 1Y foot of U4 connects the one end resistance R4,2 feet of resistance R4 other end connecting interface J2,3 feet of interface J2
It connects digitally, the anode of the other end connection light emitting diode D1 of resistance R5, the cathode of light emitting diode D1 connects digitally.
5. the one-to-many set-top box burning update device of a kind of master slice according to claim 4, it is characterised in that: the power supply
VCC is generated by power circuit, and power circuit includes that 2,3 feet of 5V power outlet DC, DC are grounded, and 1 foot of DC connects diode D2
Anode, the cathode connection anode of electrolytic capacitor C3 of diode D2, the one end capacitor C4 and out-put supply VCC, electrolytic capacitor C3
Cathode and capacitor C4 the other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821163931.3U CN208863014U (en) | 2018-07-23 | 2018-07-23 | A kind of one-to-many set-top box burning update device of master slice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821163931.3U CN208863014U (en) | 2018-07-23 | 2018-07-23 | A kind of one-to-many set-top box burning update device of master slice |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208863014U true CN208863014U (en) | 2019-05-14 |
Family
ID=66412988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821163931.3U Active CN208863014U (en) | 2018-07-23 | 2018-07-23 | A kind of one-to-many set-top box burning update device of master slice |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208863014U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114079808A (en) * | 2020-08-12 | 2022-02-22 | 深圳市兆驰数码科技股份有限公司 | Serial port number burning equipment and method for multi-channel set top box |
-
2018
- 2018-07-23 CN CN201821163931.3U patent/CN208863014U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114079808A (en) * | 2020-08-12 | 2022-02-22 | 深圳市兆驰数码科技股份有限公司 | Serial port number burning equipment and method for multi-channel set top box |
| CN114079808B (en) * | 2020-08-12 | 2023-07-04 | 深圳市兆驰数码科技股份有限公司 | Multi-channel set top box serial port number burning device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208863014U (en) | A kind of one-to-many set-top box burning update device of master slice | |
| CN204090050U (en) | TV set-top box terminal | |
| CN109448621A (en) | A kind of driving circuit and display device | |
| CN204090052U (en) | Intelligent television terminal | |
| CN206195978U (en) | Digit set -top box | |
| CN204259051U (en) | A kind of interconnection device with the Web TV of sound finding remote controller | |
| CN105898251A (en) | Photoelectric hybrid transmission device integrating DP/USB3.1/HDMI/PD functions and implemented through TYPE C interface, and conversion method | |
| CN209072482U (en) | Novel slave mode RS485 telecommunication circuit and its measuring instrument | |
| CN209028605U (en) | Serial port communication circuit and equipment | |
| CN208209903U (en) | A kind of low noise frequency demultiplier of microwave single channel | |
| CN207766249U (en) | A kind of signal isolation two-way communication circuit | |
| CN2793803Y (en) | Simple port and interface circuit | |
| CN204244423U (en) | A kind of interconnection device being applicable to the Web TV of remote control in dark surrounds | |
| CN206164711U (en) | HDMI interface communication circuit | |
| CN205945982U (en) | Simulated television of COAX interface | |
| CN204259044U (en) | A kind of interconnection device being applicable to the Web TV of remote control in dark surrounds | |
| CN219577303U (en) | Intelligent home interaction experience display system | |
| CN208581276U (en) | Mobile Broadcast Control terminal | |
| CN209375835U (en) | A kind of set-top box of integrated power cat | |
| CN204613635U (en) | A kind of digital input circuit | |
| CN220171538U (en) | Isolation serial port circuit | |
| CN218005218U (en) | Coupler with good sealing performance | |
| CN204259085U (en) | A kind of interconnection device of Web TV of tactile keyboard | |
| CN204259049U (en) | A kind of can the interconnection device of Web TV of blind remote control | |
| CN208209913U (en) | A kind of optocoupler low pass circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |