CN104360978B - SCART/UART interface multiplexing circuits and the electronic equipment using the circuit - Google Patents
SCART/UART interface multiplexing circuits and the electronic equipment using the circuit Download PDFInfo
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- CN104360978B CN104360978B CN201410489833.9A CN201410489833A CN104360978B CN 104360978 B CN104360978 B CN 104360978B CN 201410489833 A CN201410489833 A CN 201410489833A CN 104360978 B CN104360978 B CN 104360978B
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- scart
- audio
- data transmission
- video data
- serial data
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
- G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
A kind of SCART/UART interface multiplexing circuits are provided and use the electronic equipment of the circuit, the SCART/UART interface multiplexing circuits, including：SCART interface units, for transmitting audio, video data or serial data；Transmission mode judging unit, for judging the data-transmission mode of master chip selection, the data-transmission mode includes audio, video data transmission mode and serial data transmission pattern；Control unit is multiplexed, for when selecting audio, video data transmission mode, controlling the SCART interface units transmission audio, video data；When selecting serial data transmission pattern, the SCART interface units transmitting serial data is controlled.SCART interfaces and UART interface can be multiplexed, interface quantity is reduced, so as to meet the needs of electronic equipment is lightening, beautify product outward appearance.
Description
Technical field
The present invention relates to electronic technology field, more particularly to a kind of SCART/UART interface multiplexing circuits and use the circuit
Electronic equipment.
Background technology
With the development of information technology, UART (Universal Asynchronous Receiver/Transmitter,
Universal Asynchronous Receive dispensing device) agreement electronic equipment exploitation debugging in be widely used, electronic equipment is often set
UART interface is equipped with, so that UART data wires are connected into, so as to realize the data transfer between electronic equipment and UART data wires.
UART data wires comprise at least RXT lines and TXD lines, and RXT lines are used to receive serial data, and TXD is used to send serial data.
At present, for embedded development process, in order to carry out serial communication, be typically employed on mainboard configure it is special
HeadPhone interfaces are multiplexed with UART interface, and specific multiplex circuit is as shown in Figure 1.HeadPhone/UART interface duplexes
Need just to draw 2 signal wires used in UART serial communications at the beginning of circuit theory diagrams are drawn, shown in Fig. 1
HeadPhone interfaces are 7 pin earphone interface CN301_HP, and the pin and UART for being utilized respectively L channel, R channel and MIC connect
Mouthful it is multiplexed, i.e. signal wire is TDE_FANET, RDE_FANET, IDENT tri-, wherein TDB_FDANET and RDN_FANET
For UART signal of communication lines, IDENT signal wires are used for detecting whether interface connects.Developer is needed to open manually during actual use
Welding junction on hair plate, then connecting conversion platelet can just be communicated with main frame.Connect using HeadPhone/UART
Mouth multiplex circuit has as a drawback that：1st, can not be with URAT interface duplexes for not possessing the circuit of HeadPhone interfaces；2nd, need
Interface is additionally connected up and placed on PCB, taken PCB space, caused volume production cost；3rd, manual welding complex operation,
Easily produce defective products.
SCART(SyndicatdesConstructeursd'AppareilsRadior é cepteursetT é l é
Viseurs) interface is a kind of special audio-video interface, the audio-visual equipment interconnection industry mark developed by French company Peritel
Standard, and Europe Qiang Zhiyaoqiu that the interconnection in satellite television receiver, television set, video recorder and other audio ＆ video equipments is mutual
Connecting mouth has input and output function, supports three kinds of video signal formats, i.e. CVBS (compound composite video signal), YC (components
Vision signal) and RGB.In addition, SCART interfaces or transmitted in both directions, realize so-called " LOOP " circulatory function.Standard
SCART interfaces are 21 pin connectors, and external form is in a rectangular trapezoid, is commonly called as " broom head ".Audio and regard defined in this 21 pin
Frequency signal, it can be used to transmit the vision signal such as CVBS and interlacing rgb signal, stereo audio signal can also be transmitted.21 pins
21 signals of simultaneous transmission, it is several that this 21 signals can be divided into vision signal, audio signal, control signal, ground wire and data wire.
Because SCART interfaces are European generic video interfaces, it is widely used on all kinds of audio frequency and video electronic equipments.If herein
SCART interfaces be both set in class of electronic devices, UART interface is set again, then 2 interfaces need to be set in electronics setting simultaneously, such as
This one will cause the outward appearance of electronic equipment to be affected, it is impossible to meet the needs of electronic equipment is lightening, inexpensive.
The content of the invention
A kind of electronic equipment it is an object of the invention to provide SCART/UART interface multiplexing circuits and using the circuit,
SCART interfaces and UART interface can be multiplexed, reduces interface quantity, so as to meet the needs of electronic equipment is lightening, beautification production
Product outward appearance.
According to an aspect of the present invention, there is provided a kind of SCART/UART interface multiplexing circuits, including：
SCART interface units, for transmitting audio, video data or serial data；
Transmission mode judging unit, for judging the data-transmission mode of master chip selection, the data-transmission mode bag
Include audio, video data transmission mode and serial data transmission pattern；
Control unit is multiplexed, in audio, video data transmission mode, controlling the SCART interface units transmission sound to regard
Frequency evidence；In serial data transmission pattern, the SCART interface units transmitting serial data is controlled.
Further, in the SCART/UART interface multiplexing circuits, the SCART interface units, in serial data
During transmission mode, serial communication can be carried out using PIN1 pins and PIN2 pins, complete the reception and transmission of serial data, shield
Cover the data of remaining pin transmission；In audio, video data transmission mode, according to the difference of transmission audio-video signal, can utilize
Different audio frequency and video pin transmission audio, video datas.
Further, in the SCART/UART interface multiplexing circuits, the multiplexing control unit can include：Multiplexing
Switch module, audio, video data transport module and serial data transmission module；
Wherein, the Multiplexing switch module, can be transmitted respectively with the SCART interface units, the audio, video data
Module is connected with the serial data transmission module, in audio, video data transmission mode, making SCART interface units and institute
State audio, video data transport module to be connected, carry out audio, video data transmission；In serial data transmission pattern, make described
SCART interface units are connected with the serial data transmission module, carry out serial communication.
Further, in the SCART/UART interface multiplexing circuits, the SCART interface units can directly with
The audio, video data transport module is connected with the serial data transmission module；The Multiplexing switch module respectively with the sound
Video data transfer module is connected with the serial data transmission module, described in audio, video data transmission mode, making
Audio, video data transport module is in opening, and the serial data transmission module is closed, to pass through the sound
Video data transfer module carries out audio, video data transmission with the SCART interface units；In serial data transmission pattern, make
The serial data transmission module is in opening, and the audio, video data transport module is closed, to pass through
State serial data transmission module and carry out serial communication with the SCART interface units.
Further, in the SCART/UART interface multiplexing circuits, the audio, video data transport module can be with one
Side is connected with the SCART audio-video signal lines of master chip, opposite side by the Multiplexing switch module or directly with it is described
The audio frequency and video pin of SCART interface units is connected.
Further, in the SCART/UART interface multiplexing circuits, the serial data transmission module can be with side
It is connected with the UART null modem cables of master chip, opposite side connects by the Multiplexing switch module or directly with the SCART
The PIN1 pins of mouth unit are connected with PIN2 pins.
Further, in the SCART/UART interface multiplexing circuits, the Multiplexing switch module can be opened for simulation
Close.
Further, in the SCART/UART interface multiplexing circuits, the analog switch can comprise at least with
Lower pin：The SC_SR_OUT pins and SC_SR_IN pins being connected with audio, video data transport module, with serial data transmission mould
Block connected TDB_FANET pins and RDB_FANET pins, the UART_SEL pins being connected with transmission mode judging unit, with
SCART interface units connected AUDIO_IN pins and AUDIO_OUT pins.
Further, in the SCART/UART interface multiplexing circuits, the transmission mode judging unit can be with side
It is connected with the transmission mode control line of master chip, opposite side is connected with the multiplexing control unit.
According to another aspect of the present invention, there is provided a kind of electronic equipment, the electronic equipment include above-mentioned SCART/
UART interface multiplex circuit.
According to the SCART/UART interface multiplexing circuits of the present invention and the electronic equipment using the circuit, for all supports
The mainboard of SCART interfaces provides the function of carrying out serial communication, makes without changing mainboard manually during developer's embedded development, side
Just develop and reduce the generation of defective products.Due to multiplexing SCART interfaces and UART interface, interface quantity is reduced, drops equipment cost
And circuit complexity, further meet the needs of electronic equipment is lightening, beautify product outward appearance, to reduce the complexity that user operates
Degree, adds the convenience that user uses.
Brief description of the drawings
By the description to embodiment carried out below in conjunction with the accompanying drawings, above-mentioned and/or other objects and advantages of the invention
It will become apparent, wherein：
Fig. 1 shows the circuit diagram being multiplexed according to HeadPhone interfaces in background technology and UART interface；
Fig. 2 shows the structural representation of the SCART/UART interface multiplexing circuits provided according to an exemplary embodiment of the present
Figure；
The structure for the SCART/UART interface multiplexing circuits that Fig. 3 shows to be provided according to the exemplary another embodiment of the present invention is shown
It is intended to；
The circuit for the SCART/UART interface multiplexing circuits that Fig. 4 shows to be provided according to the exemplary another embodiment of the present invention shows
It is intended to；
The structure for the SCART/UART interface multiplexing circuits that Fig. 5 shows to be provided according to the exemplary another embodiment of the present invention is shown
It is intended to.
Embodiment
Embodiments of the invention are reference will now be made in detail, the example of the embodiment is shown in the drawings, wherein, identical mark
Number identical part is referred to all the time.The embodiment will be illustrated by referring to accompanying drawing below, to explain the present invention.
Fig. 2 shows the structural representation of the SCART/UART interface multiplexing circuits provided according to an exemplary embodiment of the present
Figure.As shown in Fig. 2 in SCART/UART interface multiplexing circuits according to an exemplary embodiment of the present invention, including：SCART connects
Mouth unit 1, for transmitting audio, video data or serial data；Transmission mode judging unit 3, for judging that master chip 4 selects
Data-transmission mode, the data-transmission mode includes audio, video data transmission mode and serial data transmission pattern；Multiplexing
Control unit 2, in audio, video data transmission mode, controlling the SCART interface units transmission audio, video data；Going here and there
During row data-transmission mode, the SCART interface units transmitting serial data is controlled.
In the specific implementation, directly using existing SCART interfaces on mainboard, the data transfer mould selected according to master chip 4
Formula, audio and video playing is completed using SCART interfaces are completed by being multiplexed control unit 2, SCART interfaces can also be utilized to complete to set
The transmission of serial data between standby (such as computer) with other equipment, it is not necessary to increase other interfaces in above-mentioned known technology,
So as to drop equipment cost and circuit complexity.
In the present invention, the multiplexing control unit 2 can be realized by hardware circuit or realized by software,
Or realized by software and hardware combining.
In the specific implementation, the SCART interface units 1, can have 21 pins, in serial data transmission pattern,
Serial communication can be carried out using PIN1 pins and PIN2 pins, complete the reception and transmission of serial data, shield remaining pin
The data of transmission；In audio, video data transmission mode, according to the difference of transmission audio-video signal, can be regarded using different sounds
Frequency pin transmits audio, video data.
In the specific implementation, SCART interfaces support three kinds of video signal formats, i.e. CVBS (compound composite video signal), YC (divide
Measure vision signal) and RGB, according to the difference of transmission signal, the service condition of each pin is as follows, referring to table 1-3：
A, composite video signal (Composite Video Only) is transmitted：
Table 1
B, bright, color separation signal (YC Video Only) is transmitted：
Table 2
C, composite video and R, G, B primary colour signal (Composite and RGB Video) are transmitted：
Table 3
Specifically, referring to Fig. 3, the structure of the SCART/UART interface multiplexing circuits provided for another embodiment of the present invention is shown
It is intended to.As shown in figure 3, the multiplexing control unit 2 can include：Multiplexing switch module 22, audio, video data transport module 21
With serial data transmission module 23；Wherein, the Multiplexing switch module 22, can respectively with the SCART interface units 1, institute
State audio, video data transport module 21 with the serial data transmission module 23 to be connected, in audio, video data transmission mode
When, SCART interface units 1 is connected with the audio, video data transport module 21, carry out audio, video data transmission；Serial
During data-transmission mode, the SCART interface units 1 is connected with the serial data transmission module 23, carry out serial ports and lead to
Letter.
In the specific implementation, the audio, video data transport module 21 can be with side and the SCART audio-video signals of master chip 4
Line is connected, and opposite side is connected by the Multiplexing switch module 22 with the audio frequency and video pin of the SCART interface units 1.It is described
Serial data transmission module 23 can be connected with side with the UART null modem cables of master chip 4, and opposite side is opened by the multiplexing
Module 22 is closed with the PIN1 pins and PIN2 pins of the SCART interface units 1 to be connected.
Specifically, referring to Fig. 4, the circuit of the SCART/UART interface multiplexing circuits provided for another embodiment of the present invention shows
It is intended to.As shown in figure 4, as preferred embodiment, the Multiplexing switch module can be analog switch IC305.
In the specific implementation, the analog switch IC305 can comprise at least following pin：With audio, video data transport module
21 connected SC_SR_OUT pins 7 and SC_SR_IN pins 5, the TDB_FANET pins being connected with serial data transmission module 23
2 and RDB_FANET pins 10, the UART_SEL pins 8 and 4 being connected with transmission mode judging unit 3, with SCART interface units 1
PIN2 pins the AUDIO_IN pins 9 and AUDIO_OUT pins 3 that are connected with PIN1 pins.
The operation principle of the present embodiment is described as follows：Transmission mode judging unit 3 judges the transmission mode that master chip 4 selects
After audio, video data transmission mode or serial data transmission pattern, it will determine that result is sent to IC305 UART_SEL and drawn
Pin.In audio, video data transmission mode, signal that UART_SEL pins receive is 1, IC305 by the He of AUDIO_IN pins 3
AUDIO_OUT pins 9 are connected with SC_SR_IN pins 5 and SC_SR_OUT pins 7 respectively, i.e. SCART interface units 1
The SCART audio-video signal lines of the audio, video data transport module 21 of PIN1 pins and PIN2 pins with being connected master chip 4 are connected,
Now, SCART interface units 1 are operated in normal audio, video data transmission mode；In serial data transmission pattern, UART_
The signal that SEL pins receive for 0, IC305 by AUDIO_IN pins 3 and AUDIO_OUT pins 9 respectively with RDB_FANET pins
It is connected with 10TDB_FANET pins 2, i.e., the PIN1 pins of SCART interface units 1 and PIN2 pins are with being connected master chip 4
The UART null modem cables of serial data transmission module 23 are connected, meanwhile, master chip 4 also can be the signal of the other pins of SCART
Mask, only receive to come from the PIN1 pins of SCART interface units 1 and the serial data of PIN2 pins, make SCART interface lists
Member 1 is operated under serial data transmission pattern.
Specifically, referring to Fig. 5, the structure of the SCART/UART interface multiplexing circuits provided for another embodiment of the present invention is shown
It is intended to.As shown in figure 5, the SCART interface units 1 can directly with the audio, video data transport module 21 and described serial
Data transmission module 23 is connected；The Multiplexing switch module 22 respectively with the audio, video data transport module 21 and described serial
Data transmission module 23 is connected, in audio, video data transmission mode, being in the audio, video data transport module 21
Opening, the serial data transmission module 23 are closed, with by the audio, video data transport module 21 with
The SCART interface units 1 carry out audio, video data transmission；In serial data transmission pattern, make the serial data transmission
Module 23 is in opening, and the audio, video data transport module 21 is closed, to be passed by the serial data
Defeated module 23 carries out serial communication with the SCART interface units 1.
In the specific implementation, the audio, video data transport module 21 can be with side and the SCART audio-video signals of master chip 4
Line is connected, and audio frequency and video pin of the opposite side directly with the SCART interface units 1 is connected.The serial data transmission module 23
It can be connected with side with the UART null modem cables of master chip 4, PIN1 of the opposite side directly with the SCART interface units 1 draws
Pin is connected with PIN2 pins.
The electronic equipment provided according to embodiments of the present invention, the electronic equipment are answered including above-mentioned SCART/UART interfaces
Use circuit.
Further, the electronic equipment can be multimedia player, television set, game machine, and mobile terminal etc. has concurrently
The electronic equipment of audio and video playing and data storage function.
According to the SCART/UART interface multiplexing circuits of the present invention and the electronic equipment using the circuit, for all supports
The mainboard of SCART interfaces provides the function of carrying out serial communication, makes without changing mainboard manually during developer's embedded development, side
Just develop and reduce the generation of defective products.Due to multiplexing SCART interfaces and UART interface, interface quantity is reduced, drops equipment cost
And circuit complexity, further meet the needs of electronic equipment is lightening, beautify product outward appearance, to reduce the complexity that user operates
Degree, adds the convenience that user uses.
More than the present invention each embodiment is merely exemplary, and the present invention is not limited to this.Art technology
Personnel should be appreciated that：Without departing from the principles and spirit of the present invention, can change these embodiments, wherein,
The scope of the present invention limits in claim and its equivalent.
Claims (7)
1. a kind of SCART/UART interface multiplexing circuits, including：
SCART interface units, for transmitting audio, video data or serial data；
Transmission mode judging unit, for judging the data-transmission mode of master chip selection, the data-transmission mode includes sound
Video data transmission pattern and serial data transmission pattern；
Control unit is multiplexed, in audio, video data transmission mode, controlling the SCART interface units transmission audio frequency and video number
According to；In serial data transmission pattern, the SCART interface units transmitting serial data is controlled；
The multiplexing control unit includes：Multiplexing switch module, audio, video data transport module and serial data transmission module；
Wherein, the Multiplexing switch module, respectively with the SCART interface units, the audio, video data transport module and institute
State serial data transmission module to be connected, in audio, video data transmission mode, making SCART interface units and the audio frequency and video
Data transmission module is connected, and carries out audio, video data transmission；In serial data transmission pattern, make the SCART interfaces list
It is first to be connected with the serial data transmission module, carry out serial communication；
Or the SCART interface units directly with the audio, video data transport module and the serial data transmission module
It is connected；The Multiplexing switch module is connected with the audio, video data transport module and the serial data transmission module respectively,
For in audio, video data transmission mode, making the audio, video data transport module be in opening, the serial data
Transport module is closed, and is regarded with carrying out sound with the SCART interface units by the audio, video data transport module
Frequency data transfer；In serial data transmission pattern, the serial data transmission module is set to be in opening, the audio frequency and video
Data transmission module is closed, to be gone here and there by the serial data transmission module and the SCART interface units
Port communications；
The SCART interface units, in serial data transmission pattern, carry out serial ports using PIN1 pins and PIN2 pins and lead to
Letter, completes the reception and transmission of serial data, shields the data of remaining pin transmission；In audio, video data transmission mode, root
According to the difference of transmission audio-video signal, sound is transmitted using the different audio frequency and video pins including PIN1 pins and PIN2 pins
Video data.
2. SCART/UART interface multiplexing circuits according to claim 1, it is characterised in that the audio, video data transmits mould
Block side is connected with the SCART audio-video signal lines of master chip, and opposite side is by the Multiplexing switch module or directly and institute
The audio frequency and video pin for stating SCART interface units is connected.
3. SCART/UART interface multiplexing circuits according to claim 1, it is characterised in that the serial data transmission module
Side is connected with the UART null modem cables of master chip, opposite side by the Multiplexing switch module or directly with it is described
The PIN1 pins of SCART interface units are connected with PIN2 pins.
4. SCART/UART interface multiplexing circuits according to claim 1, it is characterised in that the Multiplexing switch module is mould
Intend switch.
5. SCART/UART interface multiplexing circuits according to claim 4, it is characterised in that the analog switch comprises at least
Following pin：The SC_SR_OUT pins and SC_SR_IN pins being connected with audio, video data transport module, with serial data transmission
Module connected TDB_FANET pins and RDB_FANET pins, the UART_SEL pins being connected with transmission mode judging unit,
The AUDIO_IN pins and AUDIO_OUT pins being connected with SCART interface units.
6. SCART/UART interface multiplexing circuits according to claim 1, it is characterised in that：The transmission mode judging unit
Side is connected with the transmission mode control line of master chip, and opposite side is connected with the multiplexing control unit.
7. a kind of electronic equipment, it is characterised in that the electronic equipment includes any one of the claim 1-6 SCART/UART
Interface multiplexing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410489833.9A CN104360978B (en) | 2014-09-23 | 2014-09-23 | SCART/UART interface multiplexing circuits and the electronic equipment using the circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410489833.9A CN104360978B (en) | 2014-09-23 | 2014-09-23 | SCART/UART interface multiplexing circuits and the electronic equipment using the circuit |
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| Publication Number | Publication Date |
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| CN104360978A CN104360978A (en) | 2015-02-18 |
| CN104360978B true CN104360978B (en) | 2017-11-10 |
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| CN201410489833.9A Expired - Fee Related CN104360978B (en) | 2014-09-23 | 2014-09-23 | SCART/UART interface multiplexing circuits and the electronic equipment using the circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106201929A (en) * | 2016-07-22 | 2016-12-07 | 恒宝股份有限公司 | A kind of USB interface multiplex circuit and using method |
| CN110247775B (en) * | 2019-05-21 | 2021-08-06 | 普联技术有限公司 | UART and Ethernet multiplexing device and demultiplexing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1367821A2 (en) * | 2002-05-20 | 2003-12-03 | Samsung Electronics Co., Ltd. | Interconnecting television-related apparatuses |
| CN1697495A (en) * | 2004-05-10 | 2005-11-16 | 广达电脑股份有限公司 | TV set |
| CN202364306U (en) * | 2011-11-16 | 2012-08-01 | 南通市智勇电子有限公司 | HDMI coder-decoder |
-
2014
- 2014-09-23 CN CN201410489833.9A patent/CN104360978B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1367821A2 (en) * | 2002-05-20 | 2003-12-03 | Samsung Electronics Co., Ltd. | Interconnecting television-related apparatuses |
| CN1697495A (en) * | 2004-05-10 | 2005-11-16 | 广达电脑股份有限公司 | TV set |
| CN202364306U (en) * | 2011-11-16 | 2012-08-01 | 南通市智勇电子有限公司 | HDMI coder-decoder |
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| CN104360978A (en) | 2015-02-18 |
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