CN105898493A - Asynchronous receiver transmitter and USB interface multiplexing circuit and circuit board - Google Patents
Asynchronous receiver transmitter and USB interface multiplexing circuit and circuit board Download PDFInfo
- Publication number
- CN105898493A CN105898493A CN201610195740.4A CN201610195740A CN105898493A CN 105898493 A CN105898493 A CN 105898493A CN 201610195740 A CN201610195740 A CN 201610195740A CN 105898493 A CN105898493 A CN 105898493A
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- Prior art keywords
- circuit
- signal line
- data signal
- holding wire
- usb
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Information Transfer Systems (AREA)
- Power Sources (AREA)
- Dc Digital Transmission (AREA)
Abstract
The invention discloses an asynchronous receiver transmitter and USB interface multiplexing circuit and a circuit board and belongs to the technical field of electronic equipment. The asynchronous receiver transmitter and USB interface multiplexing circuit comprises a switching circuit and a logical judgment circuit, switches, by using the voltage of a power line or an identification signal line, between a transmission channel corresponding to the data signal line of the asynchronous transceiver transmitter and a transmission channel corresponding to the data signal line of the USB, may receive USB/UART data with one interface, and is simple in structure, easy to realize, and especially suitable for mass production.
Description
Technical field
The present invention relates to intelligent television technical field, particularly relate to a kind of asynchronous receiving-transmitting transmitter and general string
Row bus interface multiplexing circuit and circuit board, and electronic equipment.
Background technology
Along with the development of science and technology, intelligent TV set is becoming the third after computer, mobile phone
Message reference terminal, user can access the information that oneself needs at any time.And become home entertainment center, user
Intelligent television television channel searching, recording TV program can be passed through, satellite and cable television joint can be play
Mesh and Internet video.With USB (universal serial bus) (Universal Serial Bus is called for short USB).Wherein,
UART is widely used in the interface of short-distance transmission, and it uses the mode of full duplex, has relatively low power consumption；
USB supports the Serial Port Transmission speed of high speed, and each USB interface can at most be connected to 127 USB devices,
It has bigger data transmission bauds, can set up main frame and MODEM, scanner, digital camera, USB
Connection between keyboard, mouse and display etc..
In prior art, the most individually use asynchronous receiving-transmitting transmitter (Universal Asynchronous
Receiver/Transmitter, UART) interface or USB (universal serial bus) (Universal Serial
Bus, USB) interface realize between other device and intelligent television information transmission, as order or data
Transmission.
At present, intelligent television is developing, to its external interface number to light, thin, miniaturization, multifunctional direction
Mesh and design it is also proposed increasingly harsher requirement.In realizing process of the present invention, inventor discovers how
Numerous functions realized on a less interface of pin, i.e. the reasonable multiplexing of interface, is that intelligent television exists
One of key element very important in product programming and product design.Common practice one is to jump with resistance
Line, switches over.The method operation is cumbersome, needs to carry out pcb board multiple welding, complex process,
The disqualification rate that as easy as rolling off a log generation is higher in large-scale production.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of asynchronous receiving-transmitting transmitter and USB
Multiplex circuit and circuit board, and a kind of electronic equipment, ask solving the technology of USB/UART interface duplex
Topic.
Embodiments provide a kind of asynchronous receiving-transmitting transmitter and USB multiplexing electricity
Road, including:
On-off circuit, the first end of described on-off circuit electrically connects with outer input data holding wire, described
Second end of on-off circuit electrically connects with the data signal line of asynchronous receiving-transmitting transmitter, or general with described
The data signal line electrical connection of universal serial bus；
Logic judging circuit, its first input end electrically connects with power line, the second input and id signal
Line electrically connects, and the outfan of described logic judging circuit electrically connects with described on-off circuit, for according to institute
State the magnitude of voltage on power line and described id signal line, send control signal to described on-off circuit, with
The data signal line controlling described asynchronous receiving-transmitting transmitter turns on described outer input data holding wire, or
Person, the data signal line of described USB (universal serial bus) turns on described outer input data holding wire.
Further, described logic judging circuit is used on described power line during output HIGH voltage, to institute
State on-off circuit and send the first control signal, so that the data signal line of described USB (universal serial bus) is with described
Outer input data holding wire turns on.
Further, when described logic judging circuit is for exporting low-voltage on described id signal line,
Send the first control signal to described on-off circuit so that the data signal line of described USB (universal serial bus) with
Described outer input data holding wire turns on.
Further, when described logic judging circuit is for exporting low-voltage on described power line, to institute
State on-off circuit and send the second control signal, so that the data signal line of described asynchronous receiving-transmitting transmitter and institute
State the conducting of outer input data holding wire.
Further, described logic judging circuit is used on described id signal line during output HIGH voltage,
The first control signal is sent to described on-off circuit, so that the data signal line of described asynchronous receiving-transmitting transmitter
Turn on described outer input data holding wire.
Further, described high voltage is+5V, and described low-voltage is 0V.
Further, described on-off circuit includes the first switch and second switch, described outside input number
The first outer input data holding wire and the second outer input data holding wire is included according to holding wire, described different
The data signal line of step receiving-transmitting transmitter includes receiving data signal line and sending data signal line, described logical
The first data signal line and the second data signal line is included with the data signal line of universal serial bus；
First end of described first switch electrically connects with described first outer input data holding wire, and described the
Second end of one switch, and described reception data signal line, or described first data signal line are electrically connected
Connect；
First end of described second switch electrically connects with described second outer input data holding wire, and described
Second ends of two switches, and described transmission data signal line, or described second data signal line are electrically connected
Connect.
Second aspect, the embodiment of the present invention additionally provides a kind of circuit board, arbitrary including: above-mentioned offer
Described asynchronous receiving-transmitting transmitter and USB multiplex circuit.
The third aspect, the embodiment of the present invention additionally provides a kind of electronic equipment, and described electronic equipment includes
The circuit board stated.
Above-mentioned electronic equipment can be intelligent television.
Asynchronous receiving-transmitting transmitter that the embodiment of the present invention provides and USB multiplex circuit and electricity
Road plate, and electronic equipment, by utilizing logic judging circuit to believe according to described power line and described mark
Magnitude of voltage on number line, sends control signal to described on-off circuit, to control the transmission of described asynchronous receiving-transmitting
The data signal line of device turns on described outer input data holding wire, or, described USB (universal serial bus)
Data signal line and described outer input data holding wire turn on, it is achieved that use same interface permissible
Receive asynchronous receiving-transmitting transmitter or the purpose of USB (universal serial bus) data, simple in construction, it is easy to accomplish, special
It is not suitable for large-scale production.
Accompanying drawing explanation
The detailed description that non-limiting example is made made with reference to the following drawings by reading, this
Bright other features, objects and advantages will become more apparent upon:
Fig. 1 is that in prior art, USB interface arranges schematic diagram；
Fig. 2 is that in prior art, UART interface arranges schematic diagram；
Fig. 3 is asynchronous receiving-transmitting transmitter and the USB multiplexing electricity of the embodiment of the present invention one offer
The structural representation on road；
Fig. 4 is asynchronous receiving-transmitting transmitter and the USB multiplexing electricity of the embodiment of the present invention two offer
The structural representation on road.
The technical characteristic that reference in figure refers to respectively is:
11, on-off circuit；12, outer input data holding wire；13, asynchronous receiving-transmitting transmitter；
14, USB (universal serial bus)；15, logic judging circuit；111, the first switch；
112, second switch.
Detailed description of the invention
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.It is understood that
Specific embodiment described herein is used only for explaining the present invention, rather than limitation of the invention.Additionally
Also, it should be noted for the ease of describe, accompanying drawing illustrate only part related to the present invention rather than
Full content.
Embodiment one
Fig. 1 is that in prior art, USB interface arranges schematic diagram, and as seen from Figure 1, USB interface includes
5 signal line: wherein, wherein D+, D-are data signal line D+, D-；VCC is power line
(VCC), GND be earth lead (GND), ID line be id signal line,.When USB interface normally works,
VCC is+5V, and ID line is unsettled.Fig. 2 is that in prior art, UART interface arranges schematic diagram.Can by Fig. 2
To find out, UART interface includes that 5 signal line: VCC is power line, and GND is earth lead (GND), ID
Line is id signal line, RX is for receiving data wire, and TX is for sending data wire.In the normal work of UART interface
When making, VCC is unsettled, and ID line is+5V.I.e. USB interface and UART interface all has power line, connects
Ground wire and ID line and two data line, difference is that USB interface includes D+ line and D-line, and UART connects
Mouth includes TX line and RX line.
Fig. 3 is asynchronous receiving-transmitting transmitter and the USB multiplexing electricity of the embodiment of the present invention one offer
The structural representation on road.Described asynchronous receiving-transmitting transmitter and USB multiplex circuit, it is special
Levy and be, including:
On-off circuit 11, the first end of described on-off circuit 11 is electrically connected with outer input data holding wire 12
Connecing, the second end of described on-off circuit 11 electrically connects with the data signal line of asynchronous receiving-transmitting transmitter 13, or
Person electrically connects with the data signal line of described USB (universal serial bus) 14；
Logic judging circuit 15, its first input end electrically connects with power line VCC, the second input and mark
Holding wire ID electrically connects, and the outfan of described logic judging circuit electrically connects with described on-off circuit, is used for
According to the magnitude of voltage on described power line and described id signal line, send to described on-off circuit and control letter
Number, to control the data signal line of described asynchronous receiving-transmitting transmitter 13 and described outer input data holding wire
12 conductings, or, the data signal line of described USB (universal serial bus) 14 and described outer input data signal
Line 12 turns on.
Logic judging circuit 15 in the embodiment of the present invention can pass through circuit, or by circuit and soft
The mode that part combines realizes.
As seen from Figure 3, in the present embodiment, logic judging circuit has two inputs, one of them
Port electrically connects with the power line of interface, and another one input id signal line electrically connects.Additionally, patrol
Collecting decision circuitry 12 and also have an outfan, this outfan is connected with on-off circuit 11, for switch electricity
Road 11 sends control signal, so that described on-off circuit 11 controls outside choosing according to the control signal of input
Data signal line or the number of USB (universal serial bus) 14 selecting input data signal line and walk receiving-transmitting transmitter 13
Turn on according to holding wire.
Accordingly, on-off circuit 11 has two inputs, and wherein, input controls end and logic judging circuit
15 are connected, for receiving the control signal of logic judging circuit 15.Concrete, due to USB and UART
Port has two data line accordingly.Outer input data holding wire 12 includes the first outer input data
Holding wire and the second outer input data holding wire.I.e. the first end of on-off circuit 11 can be divided into outside connection
D+ and the D-line of portion's equipment.
Additionally, on-off circuit 11 correspondence also has the second end of an outfan, i.e. on-off circuit 11, switch
Second end of circuit 11 electrically connects with the data signal line of asynchronous receiving-transmitting transmitter 13, or general with described
The data signal line electrical connection of universal serial bus 14.Second end of on-off circuit 11 can transmit with asynchronous receiving-transmitting
The data signal line of device 13 or the data signal line of USB (universal serial bus) 14 can connect respectively at different time
Connect, but can not be simultaneously connected with in the same time.The control that on-off circuit 11 sends according to logic judging circuit 15
The holding wire that signal behavior processed is specifically connected.
From prior art, when USB interface normally works, power supply VCC line is+5V, and identifies letter
Number ID line is unsettled, for 0V；And when UART interface normally works, VCC is unsettled, for 0V；And ID line is
+5V.Can be drawn by above-mentioned, for logic judging circuit, then the following several working conditions of existence:
When described id signal line exports low-voltage, send the first control letter to described on-off circuit 11
Number, so that the data signal line of described USB (universal serial bus) 14 is led with described outer input data holding wire 12
Logical.
When described power line exports low-voltage, send the second control signal to described on-off circuit 11,
So that the data signal line of described asynchronous receiving-transmitting transmitter 13 is led with described outer input data holding wire 12
Logical.
On described id signal line during output HIGH voltage, send the first control letter to described on-off circuit 11
Number, so that the data signal line of described asynchronous receiving-transmitting transmitter 13 and described outer input data holding wire 12
Conducting.
On described power line during output HIGH voltage, send the first control signal to described on-off circuit 11,
So that the data signal line of described USB (universal serial bus) 14 turns on described outer input data holding wire 12.
Optionally, the high voltage in the above embodiment of the present invention is for+5V, and low-voltage is 0V.
Embodiment two
Fig. 4 is asynchronous receiving-transmitting transmitter and the USB multiplexing electricity of the embodiment of the present invention two offer
The structural representation on road.From fig. 4, it can be seen that the second end of on-off circuit 11 and asynchronous receiving-transmitting transmitter
The data signal line of 13 connects, or is connected with the data signal line of USB (universal serial bus) 14.According to UART
With the interface specification of USB, the data signal line of asynchronous receiving-transmitting transmitter 13 include receive data signal line and
Send data signal line, the data signal line of described USB (universal serial bus) 14 include the first data signal line and
Second data signal line.
Corresponding, in order to make asynchronous receiving-transmitting transmitter 13 and USB (universal serial bus) 14 interface multiplexing circuit energy
Enough normal work, said switching circuit 11 also includes the first switch 111 and second switch 112.
First end of the first switch 111 electrically connects with described first outer input data holding wire, and described first
Second end of switch 111, and described reception data signal line, or described first data signal line are electrically connected
Connect；
First end of second switch 112 electrically connects with described second outer input data holding wire, and described second
Second end of switch 112, and described transmission data signal line, or described second data signal line are electrically connected
Connect.
Below in conjunction with the specific works process of the present invention, the present invention will be further described, at external equipment
When being connected with asynchronous receiving-transmitting transmitter 13 and USB (universal serial bus) 14 interface multiplexing circuit by interface, logic
Decision circuitry 15 judges it is USB device according to the voltage of the power line VCC or id signal line ID of input
Or UART equipment.When judging that described equipment is USB device, by on-off circuit 11, outside is defeated
Enter one end of data signal line 12 and the D+ holding wire conducting of USB (universal serial bus) 14, by outer input data
The other end of holding wire 12 and the D-holding wire conducting of USB (universal serial bus) 14, enable described interface circuit
Transmit corresponding usb data.
When judging that described equipment is UART equipment, by on-off circuit, by outer input data holding wire
One end of 12 turns on, by outer input data holding wire 12 with the TX holding wire of asynchronous receiving-transmitting transmitter 13
The RX holding wire conducting of the other end and asynchronous receiving-transmitting transmitter 13, enable described interface circuit to transmit phase
The UART data answered.
Additionally, the embodiment of the present invention additionally provides a kind of circuit board, this circuit board includes any of the above-described enforcement
Asynchronous receiving-transmitting transmitter described by example and USB multiplex circuit, have above-described embodiment
Identical function, can be realized by corresponding logic circuit, it is possible to by corresponding chip and correspondence
Line realizes.
The embodiment of the present invention additionally provides a kind of electronic equipment, and this electronic equipment includes above-mentioned circuit board.
Concrete, above-mentioned electronic equipment can be intelligent television.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.People in the art
Member, it will be appreciated that the invention is not restricted to specific embodiment described here, for a person skilled in the art can
Enough carry out various obvious change, readjust and substitute without departing from protection scope of the present invention.Cause
This, although by above example, the present invention is described in further detail, but the present invention is not only
Be only limitted to above example, without departing from the inventive concept, it is also possible to include more other etc.
Effect embodiment, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. an asynchronous receiving-transmitting transmitter and USB multiplex circuit, it is characterised in that bag
Include:
On-off circuit, the first end of described on-off circuit electrically connects with outer input data holding wire, described in open
Close circuit the second end electrically connect with the data signal line of asynchronous receiving-transmitting transmitter, or with described general serial
The data signal line electrical connection of bus；
Logic judging circuit, its first input end electrically connects with power line, the second input and id signal line
Electrical connection, the outfan of described logic judging circuit electrically connects with described on-off circuit, for according to described electricity
Magnitude of voltage on source line and described id signal line, sends control signal to described on-off circuit, to control
The data signal line stating asynchronous receiving-transmitting transmitter turns on described outer input data holding wire, or, described
The data signal line of USB (universal serial bus) turns on described outer input data holding wire.
Circuit the most according to claim 1, it is characterised in that described logic judging circuit is used for
On described power line during output HIGH voltage, send the first control signal to described on-off circuit, so that described logical
Turn on described outer input data holding wire with the data signal line of universal serial bus.
Circuit the most according to claim 1, it is characterised in that described logic judging circuit is used for
When exporting low-voltage on described id signal line, send the first control signal to described on-off circuit, so that institute
The data signal line stating USB (universal serial bus) turns on described outer input data holding wire.
Circuit the most according to claim 1, it is characterised in that described logic judging circuit is used for
When exporting low-voltage on described power line, send the second control signal to described on-off circuit, so that described different
The data signal line of step receiving-transmitting transmitter turns on described outer input data holding wire.
Circuit the most according to claim 1, it is characterised in that described logic judging circuit is used for
On described id signal line during output HIGH voltage, send the first control signal to described on-off circuit, so that institute
The data signal line stating asynchronous receiving-transmitting transmitter turns on described outer input data holding wire.
6. according to the arbitrary described circuit of claim 2-5, it is characterised in that described high voltage is+5V,
Described low-voltage is 0V.
Circuit the most according to claim 1, it is characterised in that described on-off circuit includes that first opens
Closing and second switch, described outer input data holding wire includes the first outer input data holding wire and second
Outer input data holding wire, the data signal line of described asynchronous receiving-transmitting transmitter includes receiving data signal line
With send data signal line, the data signal line of described USB (universal serial bus) includes the first data signal line and the
Two data signal lines；
First end of described first switch electrically connects with described first outer input data holding wire, and described first
Second end of switch, and described reception data signal line, or described first data signal line electrical connection；
First end of described second switch electrically connects with described second outer input data holding wire, and described second
Second end of switch, and described transmission data signal line, or described second data signal line electrical connection.
8. a circuit board, it is characterised in that include that the arbitrary described asynchronous receiving-transmitting of claim 1-7 passes
Defeated device and USB multiplex circuit.
9. an electronic equipment, it is characterised in that include the circuit board described in claim 8.
Electronic equipment the most according to claim 9, it is characterised in that described electronic equipment is intelligence
TV.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610195740.4A CN105898493A (en) | 2016-03-31 | 2016-03-31 | Asynchronous receiver transmitter and USB interface multiplexing circuit and circuit board |
| PCT/CN2016/097223 WO2017166672A1 (en) | 2016-03-31 | 2016-08-29 | Asynchronous receiver/transmitter and universal serial bus interface multiplexing circuit, and circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610195740.4A CN105898493A (en) | 2016-03-31 | 2016-03-31 | Asynchronous receiver transmitter and USB interface multiplexing circuit and circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105898493A true CN105898493A (en) | 2016-08-24 |
Family
ID=57014461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610195740.4A Pending CN105898493A (en) | 2016-03-31 | 2016-03-31 | Asynchronous receiver transmitter and USB interface multiplexing circuit and circuit board |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105898493A (en) |
| WO (1) | WO2017166672A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017166672A1 (en) * | 2016-03-31 | 2017-10-05 | 乐视控股（北京）有限公司 | Asynchronous receiver/transmitter and universal serial bus interface multiplexing circuit, and circuit board |
| CN110247775A (en) * | 2019-05-21 | 2019-09-17 | 普联技术有限公司 | A kind of UART and Ethernet multiplexer and Deplexing apparatus |
| CN111651394A (en) * | 2019-03-03 | 2020-09-11 | 厦门新页微电子技术有限公司 | USB interface circuit with serial port communication and fast charging identification self-adaption and method |
| WO2022147915A1 (en) * | 2021-01-07 | 2022-07-14 | 公牛集团股份有限公司 | Smart plug and method of interaction for smart plug |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114697144B (en) * | 2020-12-30 | 2023-11-10 | 美的集团股份有限公司 | Communication device, control device and communication equipment |
| CN112954534B (en) * | 2021-03-16 | 2024-05-03 | 上海物骐微电子有限公司 | Full-integrated multifunctional charging pin control circuit and wireless earphone |
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| CN105898493A (en) * | 2016-03-31 | 2016-08-24 | 乐视控股（北京）有限公司 | Asynchronous receiver transmitter and USB interface multiplexing circuit and circuit board |
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- 2016-08-29 WO PCT/CN2016/097223 patent/WO2017166672A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017166672A1 (en) * | 2016-03-31 | 2017-10-05 | 乐视控股（北京）有限公司 | Asynchronous receiver/transmitter and universal serial bus interface multiplexing circuit, and circuit board |
| CN111651394A (en) * | 2019-03-03 | 2020-09-11 | 厦门新页微电子技术有限公司 | USB interface circuit with serial port communication and fast charging identification self-adaption and method |
| CN110247775A (en) * | 2019-05-21 | 2019-09-17 | 普联技术有限公司 | A kind of UART and Ethernet multiplexer and Deplexing apparatus |
| CN110247775B (en) * | 2019-05-21 | 2021-08-06 | 普联技术有限公司 | UART and Ethernet multiplexing device and demultiplexing device |
| WO2022147915A1 (en) * | 2021-01-07 | 2022-07-14 | 公牛集团股份有限公司 | Smart plug and method of interaction for smart plug |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017166672A1 (en) | 2017-10-05 |
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