CN207586934U - Storage medium reads switching circuit - Google Patents
Storage medium reads switching circuit Download PDFInfo
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- CN207586934U CN207586934U CN201721884301.0U CN201721884301U CN207586934U CN 207586934 U CN207586934 U CN 207586934U CN 201721884301 U CN201721884301 U CN 201721884301U CN 207586934 U CN207586934 U CN 207586934U
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Abstract
The utility model discloses a kind of storage mediums to read switching circuit,It is related to digital signal transmission technique field,The problem of switching is slower when being read for storage medium,Provide following technical scheme,The first interface module of the first access of output signal when being included in a kind of storage medium access,The second interface module of the second access of output signal when another storage medium accesses,The second handover module for reading signal is exported for the first reading signal of output when only receiving the first access signal or when receiving the second access signal,For reading a kind of storage medium that first interface module is accessed or the read module of another storage medium that reading second interface module is accessed when receiving the second reading signal when receiving the first reading signal,It realizes and is responded without other chips or terminal,Control,Automatically switch to be read out it when second interface module accesses storage medium,Shorten the duration for reading switching.
Description
Technical field
The utility model is related to digital signal transmission technique field, more specifically, it relates to which a kind of storage medium is read
Switching circuit.
Background technology
Advertisement machine is the smart machine of a new generation, is controlled by terminal software, network information transfer and multimedia terminal are shown
Show and form a complete advertisement broadcast control system, and pass through picture, word, video, small plug-in unit（Weather, exchange rate etc.）Etc. multimedias
Material carries out advertising.Advertisement machine set-top box is a part for advertisement machine, for reading the data in storage medium and by number
According to the data for being converted into player readable form.
At present, the Chinese patent application No. is 201410234631.2 discloses a kind of SD card and TF card of being inserted into simultaneously
Reading and writing data circuit, it includes read-write chip, switch unit, SD card seat, TF card seat, and the control signal pins group of read-write chip connects
Connecing the signal input part group of switch unit, data signal pin group connects SD card seat and TF card seat simultaneously, and the first of switch unit
Signal output end group connects SD card seat, second signal output terminal group connection TF card seat, control signal end connection reading and writing data terminal
Master chip the first I/O interface.
Switch unit is switching switch circuit, for working as reading and writing data terminal selection SD card channel and passing through the of master chip
When one I/O interface exports SD card switching signal, only turn between the signal input part group of switch unit and the first signal output end group
Connection, make the control signal transmission that the control signal pins group of read-write chip exports to SD card seat, control read-write chip passes through
Data signal pin group and SD card seat transmission data, are realized to SD card read/write data；Switch unit is additionally operable to when reading and writing data is whole
When end selects TF card channel and passes through the first I/O interface output TF card switching signal of master chip, the signal of switch unit is only turned on
Connection between input terminal group and second signal output terminal group, the control signal for exporting the control signal pins group of read-write chip
TF card seat is transmitted to, control read-write chip is transmitted data by data signal pin group and TF card seat, realized to TF card read/write number
According to.
Although this read/write circuit can be inserted into SD card and TF card simultaneously, the read-write switching of two cards needs data
Read-write terminal is controlled, and performs specific switching by switch unit, and reading and writing data terminal carries out feedback control and needs to respond
Time extends switching time to a certain extent.
Utility model content
In view of the deficienciess of the prior art, the first of the utility model is designed to provide a kind of reading of storage medium and cuts
Circuit is changed, has the advantages that switching is quick.
To achieve the above object, the utility model provides following technical solution：
A kind of storage medium reads switching circuit, including
First interface module can be electrically connected with a kind of storage medium, and export first when the storage medium accesses
Access signal；
Second interface module can be electrically connected with another storage medium, and in another storage medium access
Output the second access signal；
Handover module, while be electrically connected with first interface module and second interface module, for only receiving the
Signal is read in output first during one access signal, and second is exported when receiving the second access signal and reads signal；And
Read module, while be electrically connected with first interface module and second interface module, for receiving first
A kind of storage medium that first interface module is accessed is read when reading signal, second is read when receiving the second reading signal
Another storage medium that interface module is accessed.
Using above-mentioned technical proposal, when a kind of storage medium accesses first interface module, first interface module output the
One access signal, and handover module exports the first reading signal when only receiving the first access signal, read module is receiving
A kind of medium that first interface module is accessed is read after to the first read module, and is having another medium access second interface
During module, second interface module output the second access signal, no matter whether handover module receives the first access signal at this time, cuts
Mold changing block exports the second reading signal all when receiving the second access signal, so as to which read module be controlled to read second interface mould
Another medium that block is accessed, and then realize and responded without other chips or terminal, controlled, i.e., in second interface
Automatically switch to be read out it when module accesses storage medium, shorten the time of switching, response.
Preferably, the handover module is alternative analog switching circuit.
Using above-mentioned technical proposal, the receive first access signal and the second access signal are carried out with logic of propositions
Feedback, and then realize direct switching control to storage medium, the stable output signal and response time is short.
Preferably, the alternative analog switching circuit includes 74HC4053 chip ICs 1, wherein 74HC4053 chip ICs 1
10 pins be coupled to first interface module to receive the first access signal, 10 pin be coupled to simultaneously second interface module with
The second access signal is received, signal, 1 pipe of 74HC4053 chip ICs 1 are read in the 2 pins output first of 74HC4053 chip ICs 1
Signal is read in foot output second.
Using above-mentioned technical proposal, the response time of 74HC4053 chips is less than 20ns, substantially increases switching control
Speed.
Preferably, a kind of storage medium and another storage medium are respectively one kind in SD card, TF card.
Using above-mentioned technical proposal, SD card is small, cheap with TF card, applied widely.
Preferably, the read module is GL823 series card reader circuits.
Using above-mentioned technical proposal, GL823 series card reader circuit reads fast, read-write stability height.
In view of the deficienciess of the prior art, the second of the utility model is designed to provide a kind of storage medium reading dress
It puts, has the advantages that more storage mediums switch speed when reading is fast.
To achieve the above object, the utility model provides following technical solution：
A kind of storage medium reading device reads switching circuit including storage medium as described above.
Using above-mentioned technical proposal, the reading switch speed of two kinds of storage mediums is helped to improve, improves usage experience.
Preferably, the output port module that information is read with read module electric connection, for output is further included；And
For reading the power module of switching circuit and output port module for power supply to storage medium.
Using above-mentioned technical proposal, power module gives output port module for power supply, improves the output energy of output port module
Power, in addition output port module read data information is exported in a desired form, meet different use demands.
In view of the deficienciess of the prior art, the third of the utility model is designed to provide a kind of read control circuit
Plate has the advantages that more storage mediums switch speed when reading is fast.
To achieve the above object, the utility model provides following technical solution：
A kind of read control circuit plate, including storage medium reading device as described above.
Using above-mentioned technical proposal, read switch speed and accelerate, shorten the duration of the various operations comprising switching behavior.
Preferably, the storage medium reading device has multiple；
The switching device exported for the port module for switching storage medium reading device.
Using above-mentioned technical proposal, storage medium reading device reads the data information in storage medium, exterior terminal point
It is not attached with each output port module, and output port module can be switched over by switching device, to a variety of
Storage medium is selected and exports the data information of its storage as needed.
In view of the deficienciess of the prior art, the 4th of the utility model the is designed to provide a kind of advertisement machine set-top box,
Have the advantages that more storage mediums switch speed when reading is fast.
To achieve the above object, the utility model provides following technical solution：
A kind of advertisement machine set-top box, including read control circuit plate as described above.
In conclusion the utility model has the advantages that：
1. storage medium reads switching circuit and two kinds of storage mediums can be read, and can be rapidly performed by switching；
2. storage medium reading device can be exported the data of reading by output port module with different output forms,
Support abundant in rear end；
3. read control circuit plate reads different storage mediums by multiple storage medium reading circuits, and can pass through
The storage medium that switching device is read required for switching to is exported, and supports that the type read is more, and can as needed certainly
By switching, different use demands is supported.
Description of the drawings
Fig. 1 is the functional block diagram that access medium reads switching circuit in the utility model；
Fig. 2 is the circuit diagram of first interface module in the utility model；
Fig. 3 is the circuit diagram of second interface module in the utility model；
Fig. 4 is the circuit diagram of handover module in the utility model；
Fig. 5 is the circuit diagram of read module in the utility model；
Fig. 6 is the functional block diagram of storage medium reading device in the utility model；
Fig. 7 is the functional block diagram of read control circuit plate in the utility model；
Fig. 8 is the functional block diagram of advertisement machine set-top box in the utility model.
In figure：1st, first interface module；2nd, second interface module；3rd, handover module；4th, read module；5th, output terminal mouth mold
Block；6th, power module；7th, switching device；8th, sound card module；9th, video card module；10th, main control module.
Specific embodiment
The explanation being described in detail as the various embodiments of the utility model that will be illustrated below in conjunction with attached drawing is intended, without beating
It calculates and represents that the utility model can only be practiced as the embodiment.It is described for the purpose that offer fully understands the utility model
It is described in detail comprising detail.However, the technical staff in the technical field should be readily appreciated that, the utility model can not be borrowed
It helps these details and puts into practice.
In order to enable the technical solution of the utility model is more easily understood and implements, the storage in the utility model is situated between
Matter is discussed to simplify, it should be understood that a kind of storaging medium, such as floppy disk in practical application, CD, DVD, hard disk, sudden strain of a muscle
It deposits, USB flash disk, CF cards, SD card, TF card, mmc card, SM cards, memory stick, XD cards etc..
Embodiment 1
A kind of storage medium reads switching circuit, with reference to Fig. 1, including first interface module 1, second interface module 2, switching
Module 3 and read module 4.
Wherein, first interface module 1 is for accessing a kind of storage medium, and exports first when this kind of storage medium accesses
It accesses signal, and second interface module 2 is for accessing another storage medium, and exports when another storage medium accesses the
Two access signals.
It is electrically connected for handover module 3, while with first interface module 1 and second interface module 2, is only receiving
During the first access signal, signal is read in the output of handover module 3 first, and and at the same time receiving after the first access signal is received
During to the second access signal, handover module 3 exports the second reading signal at this time, in addition, not receiving the first access signal, i.e.,
When only receiving the second access signal, signal is read in similary output second to handover module 3 at this time.
It is electrically connected for read module 4, while with first interface module 1 and second interface module 2, for receiving
A kind of storage medium that first interface module 1 is accessed is read during to the first reading signal, when receiving the second reading signal
Read another storage medium that second interface module 2 is accessed.
With two kinds of storage mediums be respectively SD card, TF card as an example, in the present embodiment, first interface module 1 and
Two interface modules 2 are card seat circuit.
With reference to Fig. 2, first interface module 1 includes deck CARD1, resistance R1, resistance R2, resistance R3, capacitance C1, capacitance
1 pin, 2 pins of C2, wherein deck CARD1 are inserted into the data information of SD card for output, and 10 pins of deck CARD1 are defeated
Go out the first access signal, which is a preset level signal.
With reference to Fig. 3, second interface module 2 includes deck CARD2, resistance R4, resistance R5, resistance R6, capacitance C3, capacitance
1 pin, 2 pins of C4, wherein deck CARD2 are inserted into the data information of TF card for output, and 10 pins of deck CARD2 are defeated
Go out the second access signal, which is a level signal preset, higher than the first access signal level.
With reference to Fig. 4, switching circuit is adopted as alternative analog switching circuit, and alternative analog switching circuit includes
10 pins of 74HC4053 chip ICs 1, wherein 74HC4053 chip ICs 1 are coupled to 10 pins of deck CARD1 to receive first
Signal is accessed, which is coupled to 10 pins of deck CARD2 to receive the second access signal, 74HC4053 chips simultaneously
Signal is read in output first after the 2 pin serial connection resistance R8 of IC1, defeated after 1 pin series resistance R10 of 74HC4053 chip ICs 1
Go out the second reading signal, and in order to improve output level, two output signal ends are connected separately with pull-up resistor.
With reference to Fig. 5, read module 4 is adopted as GL823 series card reader circuits, including GL823K chip ICs 2, resistance R11,
2 pins, 3 pins, 6 pins, 7 pins of resistance R12, capacitance C5, capacitance C6, capacitance C7, wherein GL823K chip ICs 2, which correspond to, to be connected
It is connected to 9 pins, 8 pins, 2 pins, 1 pin of deck CARD1,2 pins, 3 pins, 6 pins, 7 pins of GL823K chip ICs 2
It is also correspondingly connected to 9 pins, 8 pins, 2 pins, 1 pin of deck CARD2 simultaneously, 4 pins of GL823K chip ICs 2 are connected to
For 2 pins of 74HC4053 chip ICs 1 to receive the first reading signal, 5 pins of GL823K chip ICs 2 are connected to 74HC4053 cores
1 pin of piece IC1 is to receive the second reading signal.
Specific works state：
Situation 1：Only deck CARD1 accesses SD card
When deck CARD1 is inserted into SD card, 10 pins of deck CARD1 persistently export corresponding with the access state the at this time
One access signal, if at the same time deck CARD2 does not access TF card, i.e. 10 pins of deck CARD2 do not have output signal,
74HC4053 chip ICs 1 only receive the first access signal, carry out exporting first by 2 pins after the logical operation of level signal
Signal is read, GL823K chip ICs 2 start to read in the SD card memory storage of deck CARD1 transmission after receiving the first reading signal
Data information.
Situation 2：Only deck CARD2 accesses TF card
When deck CARD2 is inserted into TF card, 10 pins of deck CARD2 persistently export corresponding with the access state the at this time
Two access signals, if at the same time deck CARD1 does not access SD card, i.e. 10 pins of deck CARD1 do not have output signal,
74HC4053 chip ICs 1 only receive the second access signal, carry out exporting second by 2 pins after the logical operation of level signal
Signal is read, GL823K chip ICs 2 start to read in the TF card memory storage of deck CARD2 transmission after receiving the second reading signal
Data information.
Situation 3：Deck CARD1 first accesses SD card, and TF card is accessed after deck CARD2
When deck CARD1 is inserted into SD card, before deck CARD2 does not access TF card, situation is identical with situation 1 at this time,
GL823K chip ICs 2 read in the data information of the SD card memory storage of deck CARD1 transmission.
If deck CARD2 is inserted into TF card later, 10 pins of deck CARD2 persistently export and the access state pair at this time
Answer second access signal, 74HC4053 chip ICs 1 after the first reading signal is received again simultaneously receive the second access believe
Number, the logical operation of level signal is carried out, signal is read by 2 pins output second later, GL823K chip ICs 2 receive the
Start the data information of the TF card memory storage of reading deck CARD2 transmission after the second reading number of winning the confidence, and then realize and read by SD card
It is switched fast to what TF card was read.
Situation 4：Deck CARD2 first accesses TF, and SD card is accessed after deck CARD1
When deck CARD2 is inserted into TF card, before deck CARD1 does not access SD card, situation is identical with situation 2 at this time,
GL823K chip ICs 2 read in the data information of the TF card memory storage of deck CARD2 transmission.
If deck CARD1 is inserted into SD card later, 10 pins of deck CARD1 persistently export and the access state pair at this time
Answer first access signal, 74HC4053 chip ICs 1 after the second reading signal is received again simultaneously receive the first access believe
Number, the logical operation of level signal is carried out, still exports the second reading signal by 2 pins later, GL823K chip ICs 2 are read
State will not switch.
Embodiment 2
A kind of storage medium reading device with reference to Fig. 6, reads switching circuit including the storage medium in embodiment 1, also wraps
It includes and is electrically connected the output port module 5 for exporting read data information in the form of required port with read module 4,
And for the power module 6 that storage medium reads switching circuit, output port module 5 is powered.
Output port module 5 can connect for USB interface, IEEE1394 interfaces, Cinch RCA interfaces, USB interface, DVI
Mouth, HDMI interface, LPT interfaces, DPSATA interfaces etc..Power module 6 is adopted as switching power circuit in the present embodiment, should
It can also be the power circuit of other replacements to understand power module 6.
Embodiment 3
A kind of read control circuit plate, with reference to Fig. 7, including the storage medium reading device in multiple embodiments 2, Yi Jiyong
In the switching device 7 for selecting and switching the output port in each device and exported, which can cut for hand
Change switch, or common gating circuit.
Embodiment 4
A kind of advertisement machine set-top box, with reference to Fig. 8, including the read control circuit plate in embodiment 3 and by read number
It is believed that breath is converted into the video card module 9 of graphic simulation signal output and data streams read information is converted into speech simulation letter
The sound card module 8 of number output and the main control module 10 that is manipulated to advertisement machine, main control module 10 can be microcontroller,
The controller with operation, data-handling capacity such as ARM, FPGA, DSP.
The above is only the preferred embodiment of the utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, all technical solutions belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, several improvement under the premise of the utility model principle is not departed from and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of storage medium reads switching circuit, it is characterized in that：Including
First interface module (1) can be electrically connected with a kind of storage medium, and output first connects when the storage medium accesses
Enter signal；
Second interface module (2) can be electrically connected with another storage medium, and defeated in another storage medium access
Go out the second access signal；
Handover module (3), while be electrically connected with first interface module (1) and second interface module (2), for only receiving
Signal is read to output first during the first access signal, second is exported when receiving the second access signal and reads signal；And
Read module (4), while be electrically connected with first interface module (1) and second interface module (2), for receiving
A kind of storage medium that first interface module (1) is accessed is read during the first reading signal, when receiving the second reading signal
Read another storage medium that second interface module (2) is accessed.
2. storage medium according to claim 1 reads switching circuit, it is characterized in that：The handover module (3) is two choosings
One analog switching circuit.
3. storage medium according to claim 2 reads switching circuit, it is characterized in that：The alternative analog switching circuit
Including 74HC4053 chip ICs 1,10 pins of wherein 74HC4053 chip ICs 1 are coupled to first interface module (1) to receive
One access signal, 10 pin are coupled to second interface module (2) to receive the second access signal, 74HC4053 chips simultaneously
Signal is read in the 2 pins output first of IC1, and signal is read in the 1 pin output second of 74HC4053 chip ICs 1.
4. storage medium according to claim 1 reads switching circuit, it is characterized in that：A kind of storage medium with it is another
Kind storage medium is respectively one kind in SD card, TF card.
5. storage medium according to claim 4 reads switching circuit, it is characterized in that：The read module (4) is GL823
Serial card reader circuit.
6. a kind of storage medium reading device, it is characterized in that：It is read including the storage medium as described in any in claim 1 to 5
Take switching circuit.
7. storage medium reading device according to claim 6, it is characterized in that：It further includes
The output port module (5) of information is read with read module (4) electric connection, for output；And
For reading the power module (6) of switching circuit and output port module (5) power supply to storage medium.
8. a kind of read control circuit plate, it is characterized in that：Including storage medium reading device as claimed in claims 6 or 7.
9. read control circuit plate according to claim 8, it is characterized in that：The storage medium reading device has multiple；
It further includes to switch the switching device (7) that the output port module (5) of storage medium reading device is exported.
10. a kind of advertisement machine set-top box, it is characterized in that：Including the read control circuit plate as described in claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721884301.0U CN207586934U (en) | 2017-12-28 | 2017-12-28 | Storage medium reads switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721884301.0U CN207586934U (en) | 2017-12-28 | 2017-12-28 | Storage medium reads switching circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207586934U true CN207586934U (en) | 2018-07-06 |
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ID=62740287
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721884301.0U Expired - Fee Related CN207586934U (en) | 2017-12-28 | 2017-12-28 | Storage medium reads switching circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111954049A (en) * | 2020-08-25 | 2020-11-17 | 深圳铭薪曙能科技有限公司 | Television system based on external storage education resources |
| CN113723122A (en) * | 2021-08-30 | 2021-11-30 | 百富计算机技术（深圳）有限公司 | Card reading circuit, card reader and card reading system |
-
2017
- 2017-12-28 CN CN201721884301.0U patent/CN207586934U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111954049A (en) * | 2020-08-25 | 2020-11-17 | 深圳铭薪曙能科技有限公司 | Television system based on external storage education resources |
| CN113723122A (en) * | 2021-08-30 | 2021-11-30 | 百富计算机技术（深圳）有限公司 | Card reading circuit, card reader and card reading system |
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Granted publication date: 20180706 |