CN104008079B - Data reading and writing circuit capable of simultaneously inserting SD (secure digital memory) card and TF (trans-flash) card - Google Patents
Data reading and writing circuit capable of simultaneously inserting SD (secure digital memory) card and TF (trans-flash) card Download PDFInfo
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- CN104008079B CN104008079B CN201410234361.2A CN201410234361A CN104008079B CN 104008079 B CN104008079 B CN 104008079B CN 201410234361 A CN201410234361 A CN 201410234361A CN 104008079 B CN104008079 B CN 104008079B
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Abstract
The invention discloses a data reading and writing circuit capable of simultaneously inserting an SD card and a TF card. The data reading and writing circuit is characterized by comprising a reading and writing chip, a switching unit, an SD card seat and a TF card seat. The control signal pins of the reading and writing chip are connected with the signal input terminal group of the switching unit and meanwhile connected with the SD card seat and the TF card seat; the first signal output terminal group of the switching unit is connected with the SD card seat, the second signal output terminal group is connected with the TF card seat, and the control signal end of the switching unit is connected with the first IO (input/output) interface of the main chip of a data reading and writing terminal. The data reading and writing circuit capable of simultaneously inserting the SD card and the TF card can switch to memory card channels requiring data reading and writing in real time according to user selection and is relatively low in cost.
Description
Technical field
The present invention relates to digital signal transmission field, more particularly to a kind of reading and writing data that can simultaneously insert SD card and TF cards
Circuit.
Background technology
RAM card reading and writing data circuit is by the digital independent of RAM card and the circuit for writing data into RAM card.Conventional
RAM card mainly has SD card and TF cards.RAM card reading and writing data circuit is used for Reader Design, and its circuit is by read-write chip
It is directly connected to SD card seat or TF decks, using read-write chip to SD card or TF card read/write data, wherein, read-write chip can be with
The master chip that the data of RAM card are converted to reading and writing data terminal (such as TV, computer, mobile phone electric terminal) can be known
Other signal, such as rs 232 serial interface signal, usb signal, or the signal that the master chip of reading and writing data terminal can be recognized is converted to interior
The data of card are deposited, but the circuit is merely able to insert a RAM card.
Prior art is improved in foregoing circuit, will two Card Reader chips connect with SD card seat and TF decks respectively
Connect, then described two Card Reader chips are connected to into N and turn a USB HUB modules (such as the integrated chip of model GL850A), the N
Turn a USB HUB modules be used for switch SD card data transmission and TF card data transmission, therefore can insert simultaneously SD card and
TF cards, and realize the read-write capability of SD card and TF cards.But the circuit needs to increase a Card Reader chip and a N turns a USB
HUB modules, therefore, it is relatively costly.
The disclosure of the invention of Application No. 201210079803.1 is a kind of for TF or the control circuit of SD card, including one
Integrated circuit modules, the integrated circuit modules are provided with a power input VCC, a beginning energy end for being used to sense TF or SD card
The signal end TFnCD of nCD, control end SDo-DET-N and a power output end VDD；The integrated circuit modules are used to connect
Receive TF or SD card begin can end nCD signal, and by control end SDo-DET-N by the signal transmission to CPU, while CPU is logical
The control integrated circuit modules work of control end SDo-DET-N is crossed, integrated circuit modules are powered to TF or SD card.This invention only takes up
One IO control port of CPU, main purpose be save CPU IO control ports, but can not insert simultaneously TF cards with
SD card.
The content of the invention
The invention provides a kind of reading and writing data circuit that can simultaneously insert SD card and TF cards, and can select real according to user
When be switched to the internal memory card channel for needing reading and writing data, and cost is relatively low.
In order to solve above-mentioned technical problem, the invention provides a kind of reading and writing data electricity that can simultaneously insert SD card and TF cards
Road, including read-write chip, switch unit, SD card seat, TF decks, the read-write chip control signal pin set connection described in cut
The signal input part group of unit is changed, data signal pin group connects the SD card seat and the TF decks, the switching list simultaneously
First signal output part group of unit connects the SD card seat, and secondary signal output end group connects the TF decks, control signal end
First I/O interface of the master chip of connection reading and writing data terminal；
The switch unit is switching on-off circuit, for selecting SD card passage and by master when the reading and writing data terminal
During the first I/O interface output SD card switching signal of chip, the signal input part group and described first of the switch unit is only turned on
Connection between signal output part group, makes the control signal that the control signal pin set of the read-write chip is exported transmit to described
SD card seat, controls the read-write chip by data signal pin group and the SD card seat transmission data, realizes to SD card read/write
Data；The switch unit is additionally operable to when the reading and writing data terminal selects TF card channels and the first I/O interface for passing through master chip
During output TF card switching signals, only turn between the signal input part group of the switch unit and the secondary signal output end group
Connection, the control signal that the control signal pin set of the read-write chip is exported is transmitted to the TF decks, control is described
Read-write chip is realized to TF card read/write data by data signal pin group and the TF decks transmission data.
Wherein, the control signal pin set of the read-write chip includes command signal pin, Clock Signal pin, insertion inspection
Survey signal pins, write enable pin, the signal input part group of the switch unit includes that command signal input, clock signal are defeated
Enter end, insertion detection signal input, write enable input, the command signal pin of the read-write chip, Clock Signal pin,
Insert detection signal pin, write command signal input, clock signal input that enable pin connects respectively the switch unit
Hold, insert detection signal input, write enable input.
Wherein, the first signal output part group of the switch unit includes that SD card command signal output end, SD card clock are believed
Number output end, SD card insertion detection signal output end, SD card write enable output end, and corresponding are connected to the SD card seat；Institute
Stating the secondary signal output end group of switch unit includes that TF card command signal output ends, TF card clock signal output terminals, TF cards are inserted
Enter detection signal output end, and corresponding be connected to the TF decks.
Wherein, when the reading and writing data terminal selects SD card passage and is cut by the first I/O interface output SD card of master chip
When changing signal, the switch unit is respectively turned on command signal input and SD card command signal output end, clock signal input
Insert detection signal output end, write enable input with SD card clock signal output terminal, insertion detection signal input and SD card in end
End and SD card write the connection enabled between output end；When the reading and writing data terminal selects TF card channels and passes through the of master chip
During one I/O interface output TF card switching signals, it is defeated with TF card command signals that the switch unit is respectively turned on command signal input
Go out end, clock signal input terminal and TF card clock signal output terminals, insertion detection signal input and TF cards insertion detection signal
Connection between output end.
Wherein, the data signal pin group of the read-write chip includes that the first data signal pin, the second data-signal are drawn
Pin, the 3rd data signal pin, the 4th data signal pin, and while corresponding be connected to SD card seat and TF decks.
Preferably, the second I/O interface of the master chip of the reading and writing data terminal connects the switching list by first resistor
The SD card insertion detection signal output end of unit, also connects power supply by second resistance, and the 3rd I/O interface is connected by 3rd resistor
The TF cards insertion detection signal output end of the switch unit, also connects power supply by the 4th resistance.
Further, the energization pins of the read-write chip connect the power pins of the SD card seat by lc circuit, also
The power pins of the TF decks are connected by another lc circuit.
Further, the SD card switching signal is low level signal, and the TF cards switching signal is high level signal.
Further, the switch unit is the analog switch chip of model SGM5018, and the read-write chip is model
For the integrated chip of GL827 series.
Implement the present invention, have the advantages that：
1st, the present invention by switch unit switching Card Reader chip control signal to be transmitted to RAM card, so as to control
It is the data for reading and writing SD card or TF cards, realizes being inserted while SD card and TF cards, and the function that can switch in real time；
2nd, the present invention can detect the insertion of RAM card, and be automatically switched to according to the insertion of the RAM card for detecting slotting
The passage of the RAM card for entering；
3rd, the present invention is compared and is turned the transmission of the transmission and TF card data of USB HUB modules switching SD card data using N
Circuit, it is only necessary to a Card Reader chip and an analog switch chip, cost is less expensive.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 be the present invention provide can be while inserting the circuit diagram of the embodiment of the reading and writing data circuit of SD card and TF cards；
Fig. 2 is the concrete connection circuit diagram of Fig. 1；
Fig. 3 is the connection diagram of read-write chip in Fig. 1；
Fig. 4 is the connection diagram of SD card seat in Fig. 1；
Fig. 5 is the connection diagram of TF decks in Fig. 1
Fig. 6 is the connection diagram of the analog switch chip of another embodiment that the present invention is provided；
Fig. 7 be the present invention provide can be while inserting the circuit of the another embodiment of the reading and writing data circuit of SD card and TF cards
Figure.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment 1
Fig. 1 be it is provided in an embodiment of the present invention it is a kind of can be while inserting the circuit of the reading and writing data circuit of SD card and TF cards
Figure, including read-write chip 10, switch unit 20, SD card seat 30, TF decks 40, the control signal pin set of the read-write chip 10
Connect the signal input part group of the switch unit 20, data signal pin group connects the SD card seat 30 and the TF cards simultaneously
Seat 40, the first signal output part group of the switch unit 20 connects the SD card seat 30, secondary signal output end group connection institute
State TF decks 40, the first I/O interface of the master chip 50 of control signal end connection reading and writing data terminal；The switch unit 20 is
Switching on-off circuit, for when the reading and writing data terminal selects SD card passage and exports SD by the first I/O interface of master chip
During card switching signal (i.e. low level signal), the signal input part group and first signal for only turning on the switch unit 20 is defeated
The connection gone out between the group of end, makes the control signal that the control signal pin set of the read-write chip 10 is exported transmit to the SD card
Seat 30, controls the read-write chip 10 by data signal pin group and the transmission data of SD card seat 30, realize reading to SD card/
Write data；The switch unit 20 is additionally operable to when the reading and writing data terminal selects TF card channels and the IO for passing through master chip
During interface output TF card switching signals (i.e. high level signal), the signal input part group of the switch unit 20 and described is only turned on
Connection between secondary signal output end group, makes the control signal transmission that the control signal pin set of the read-write chip 10 is exported
To the TF decks 40, the read-write chip 10 is controlled by data signal pin group and the transmission data of TF decks 40, it is real
Now to TF card read/write data.
Wherein, the read-write chip 10 is the integrated chip of model GL827 series, as shown in Figures 2 and 3, the reading
Writing the control signal pin set of chip 10 includes command signal pin GL827_CMD, Clock Signal pin GL827_CLK, insertion
Detection signal pin GL827_CDZ, enable pin GL827_WP is write, the signal input part group of the switch unit 20 includes instruction
Signal input part IN_CMD, clock signal input terminal IN_CLK, insertion detection signal input IN_CDZ, write enable input
IN_WP, the command signal pin GL827_CMD of the read-write chip 10, Clock Signal pin GL827_CLK, insertion detection letter
Number pin GL827_CDZ, write and enable the command signal input IN_ that pin GL827_WP connects respectively the switch unit 20
CMD, clock signal input terminal IN_CLK, insertion detection signal input IN_CDZ, write enable input IN_WP.
Wherein, as shown in Fig. 2 the first signal output part group of the switch unit 20 includes SD card command signal output end
SD_CMD, SD card clock signal output terminal SD_CLK, SD card insertion detection signal output end SD_CDZ, SD card write enable output end
SD_WP, and it is corresponding be connected to the SD card seat 30, concrete connection refers to Fig. 4；The secondary signal output of the switch unit 20
End group includes that TF card command signal output end TF_CMD, TF card clock signal output terminal TF_CLK, TF card insertion detection signal is defeated
Go out and hold TF_CDZ, and it is corresponding be connected to the TF decks 40, concrete connection refers to Fig. 5.
Specifically, when the reading and writing data terminal selects SD card passage and exports SD card by the first I/O interface of master chip
During switching signal, the switch unit 20 is respectively turned on command signal input IN_CMD and SD card command signal output end SD_
CMD, clock signal input terminal IN_CLK and SD card clock signal output terminal SD_CLK, insertion detection signal input IN_CDZ with
SD card inserts detection signal output end SD_CDZ, writes the company for enabling that input IN_WP and SD card are write between enable output end SD_WP
Connect；When the reading and writing data terminal selects TF card channels and exports TF card switching signals by the first I/O interface of master chip,
The switch unit 20 is respectively turned on command signal input IN_CMD and TF card command signal output ends TF_CMD, clock signal
Input IN_CLK and TF card clock signal output terminal TF_CLK, insertion detection signal input IN_CDZ and TF card insertion detection
Connection between signal output part TF_CDZ.
Wherein, as shown in Fig. 2 the data signal pin group of the read-write chip 10 includes the first data signal pin
GL827_D0, the second data signal pin GL827_D1, the 3rd data signal pin GL827_D2, the 4th data signal pin
GL827_D3, and while corresponding be connected to SD card seat 30 and TF decks 40.
Further, as shown in figure 4, the connection figure of the concrete pin for SD card seat 30, annexation can be with reference to Fig. 2, figure
3rd, Fig. 4, energization pins GL827_OSO of the read-write chip 10 connect the power pins of the SD card seat 30 by lc circuit
VCC_MS and VDD_SD, for powering for SD card seat 30,
Further, as shown in figure 5, the connection figure of the concrete pin for TF decks 40, annexation can be with reference to Fig. 2, figure
3rd, Fig. 5, energization pins GL827_OSO of the read-write chip 10 also connect the power supply of the TF decks 40 by another lc circuit
Pin VDD, for powering for TF decks 40.
The operation principle of the present embodiment is：When TF cards are inserted TF decks by user, and TF is selected in reading and writing data terminal
During passage, master chip 50 exports high level by the first I/O interface, makes control switch unit 20 be respectively turned on command signal input
End IN_CMD and TF card command signal output ends TF_CMD, clock signal input terminal IN_CLK and TF card clock signal output terminal
Connection between TF_CLK, insertion detection signal input IN_CDZ and TF card insertion detection signal output end TF_CDZ.And because
Insertion detection signal output end TF_CDZ that switch unit can be made after insertion TF cards is changed into low level, connected insertion detection
Signal input part IN_CDZ is also changed into low level, then GL827L-CDZ pins are low level, that is, detected card insertion.Now
Read-write chip 10 can send control instruction and clock by command signal pin GL827_CMD, Clock Signal pin GL827_CLK
Instruction, TF clampings are received and pass through after control instruction and clock instruction the first data signal pin GL827_D0, the second data-signal
Pin GL827_D1, the 3rd data signal pin GL827_D2, the 4th data signal pin GL827_D3 and read-write chip 10 are passed
The data for receiving are converted to again transmission of data, read-write chip 10 master chip that reading and writing data terminal is transferred to after usb signal.SD
The read-write of card data in the same manner, is repeated no more with the reading of TF card data.
Embodiment 2
Present invention also offers another embodiment, it is with the difference of the embodiment shown in Fig. 2：Switch unit
Function is realized using the analog switch chip of model SGM5018.Other parts and the connection one shown in Fig. 2 in this enforcement
Cause, for the connection between other parts refers to embodiment 1, will not be described here.Fig. 6 is the simulation of model SGM5018
The concrete connection figure of switch chip, it is checked with the annexation between other each several parts incorporated by reference to Fig. 2, Fig. 3, Fig. 6.Wherein,
The COM group pins of the signal input part group correspondence analog switch chip of switch unit, i.e. command signal input IN_CMD, clock
Signal input part IN_CLK, insertion detection signal input IN_CDZ, write enable input IN_WP be respectively COM1 pins,
COM2 pins, COM3 pins, COM4 pins, the first signal output part group of switch unit is that the NC groups of analog switch chip are drawn
Pin, i.e. SD card command signal output end SD_CMD, SD card clock signal output terminal SD_CLK, SD card insertion detection signal output end
SD_CDZ, SD card write enable output end SD_WP and are respectively NC1 pins, NC2 pins, NC3 pins, NC4 pins, the switching list
The secondary signal output end group of unit is the NO group pins of analog switch chip, i.e. TF cards command signal output end TF_CMD, TF card
Clock signal output terminal TF_CLK, TF card insertion detection signal output end TF_CDZ is respectively NO1 pins, NO2 pins, NO3 and draws
Pin.The IN pins of analog switch chip are connected to the first I/O interface of the master chip of reading and writing data terminal.Analog switch chip can
When IN pins are as low level, to turn on the connection between COM groups pin and NC group pins, when IN pins are high level, lead
Connection between logical COM groups pin and NO group pins, so as to realize the function of the switching channel of switch unit.
Embodiment 3
Fig. 7 is an alternative embodiment of the invention, and it is to increased insertion detection electricity with the difference of embodiment 1
Other parts are consistent with the connection shown in Fig. 2 in road, this enforcement, for the connection between other parts refers to embodiment 1,
This is repeated no more.Insertion detection circuit is that the second I/O interface of the master chip 50 of the reading and writing data terminal passes through first resistor
R1 connects SD card insertion detection signal output end SD_CDZ of the switch unit 20, also connects power supply by second resistance R2
3V3_STB, the 3rd I/O interface inserts detection signal output end TF_ by the TF cards that 3rd resistor R3 connects the switch unit 20
CDZ, also connects power supply 3V3_STB by the 4th resistance R4.
The operation principle of the present embodiment is：When there is SD card to insert, SD card insertion detection signal output end SD_CDZ is
Low level, the second I/O interface for making the master chip 50 of reading and writing data terminal detects low level, then the main core of reading and writing data terminal
Piece 50 exports SD card switching signal (low level) by the first I/O interface, and control switch unit 20 is switched to SD card passage；TF cards
During insertion, TF cards insertion detection signal output end TF_CDZ is low level, makes the 3rd IO of the master chip 50 of reading and writing data terminal
Interface detects low level, then export TF card switching signals (high level) by the first I/O interface, and control switch unit 20 switches
To TF card channels.When SD card, TF cards are inserted simultaneously, can be judged to need to export high level or low electricity according to the priority for arranging
It is flat, therefore it is capable of achieving the automatic channel switching of SD card, TF cards.Wherein, the second I/O interface and the 3rd I/O interface detect low level
When, the master chip 50 of reading and writing data terminal is default by software by the signal that the first I/O interface is exported.
Implement the present invention, have the advantages that：
1st, the present invention by switch unit switching Card Reader chip control signal to be transmitted to RAM card, so as to control
It is the data for reading and writing SD card or TF cards, realizes being inserted while SD card and TF cards, and the function that can switch in real time；
2nd, the present invention can detect the insertion of RAM card, and be automatically switched to according to the insertion of the RAM card for detecting slotting
The passage of the RAM card for entering；
3rd, the present invention is compared and is turned the transmission of the transmission and TF card data of USB HUB modules switching SD card data using N
Circuit, it is only necessary to a Card Reader chip and an analog switch chip, cost is less expensive.
Above disclosed is only a kind of preferred embodiment of the invention, can not limit the power of the present invention with this certainly
Sharp scope, therefore the equivalent variations made according to the claims in the present invention, still belong to the scope that the present invention is covered.
Claims (10)
1. a kind of reading and writing data circuit that can simultaneously insert SD card and TF cards, it is characterised in that single including read-write chip, switching
Unit, SD card seat, TF decks, the control signal pin set of the read-write chip connects the signal input part group of the switch unit,
Data signal pin group connects the SD card seat and the TF decks simultaneously, and the first signal output part group of the switch unit connects
The SD card seat is connect, secondary signal output end group connects the TF decks, and control signal end connects the main core of reading and writing data terminal
First I/O interface of piece；
The switch unit is switching on-off circuit, for when the reading and writing data terminal selects SD card passage and passes through master chip
The first I/O interface output SD card switching signal when, only turn on the signal input part group and first signal of the switch unit
Connection between output end group, makes the control signal that the control signal pin set of the read-write chip is exported transmit to the SD card
Seat, controls the read-write chip by data signal pin group and the SD card seat transmission data, realizes to SD card read/write number
According to；The switch unit is additionally operable to when reading and writing data terminal selection TF card channels and defeated by the first I/O interface of master chip
When going out TF card switching signals, only turn between the signal input part group of the switch unit and the secondary signal output end group
Connection, makes the control signal that the control signal pin set of the read-write chip is exported transmit to the TF decks, controls the reading
Chip is write by data signal pin group and the TF decks transmission data, is realized to TF card read/write data.
2. the reading and writing data circuit of SD card and TF cards can be inserted as claimed in claim 1 simultaneously, it is characterised in that the read-write
The control signal pin set of chip includes command signal pin, Clock Signal pin, insertion detection signal pin, writes enable and draw
Pin, the signal input part group of the switch unit includes that command signal input, clock signal input terminal, insertion detection signal are defeated
Enter end, write enable input, the command signal pin of the read-write chip, Clock Signal pin, insertion detection signal pin, write
Enable command signal input, clock signal input terminal, insertion detection signal input that pin connects respectively the switch unit
Hold, write enable input.
3. the reading and writing data circuit of SD card and TF cards can be inserted as claimed in claim 2 simultaneously, it is characterised in that the switching
First signal output part group of unit includes SD card command signal output end, SD card clock signal output terminal, SD card insertion detection
Signal output part, SD card write enable output end, and corresponding are connected to the SD card seat；The secondary signal of the switch unit is defeated
Go out end group including TF card command signal output ends, TF card clock signal output terminals, TF cards insertion detection signal output end, and correspondence
Be connected to the TF decks.
4. the reading and writing data circuit of SD card and TF cards can be inserted as claimed in claim 3 simultaneously, it is characterised in that when the number
When selecting SD card passage according to read-write terminal and exporting SD card switching signal by the first I/O interface of master chip, the switch unit
Command signal input is respectively turned on the output of SD card command signal output end, clock signal input terminal and SD card clock signal
End, insertion detection signal input and SD card insertion detection signal output end, write and enable input and SD card writes enable output end
Between connection；When the reading and writing data terminal selects TF card channels and exports the switching of TF cards by the first I/O interface of master chip
During signal, the switch unit is respectively turned on command signal input and TF card command signal output ends, clock signal input terminal
With the connection between TF card clock signal output terminals, insertion detection signal input and TF cards insertion detection signal output end.
5. the reading and writing data circuit of SD card and TF cards can be inserted as claimed in claim 2 simultaneously, it is characterised in that the read-write
The data signal pin group of chip include the first data signal pin, the second data signal pin, the 3rd data signal pin, the
Four data signal pins, and while corresponding be connected to SD card seat and TF decks.
6. the reading and writing data circuit of SD card and TF cards can be inserted as claimed in claim 3 simultaneously, it is characterised in that the data
It is defeated that second I/O interface of the master chip of read-write terminal inserts detection signal by the SD card that first resistor connects the switch unit
Go out end, also power supply is connected by second resistance, the 3rd I/O interface connects the TF cards insertion of the switch unit by 3rd resistor
Detection signal output end, also connects power supply by the 4th resistance, wherein, when the second of the master chip of only described reading and writing data terminal
When I/O interface detects low level, SD card switching signal is exported by the first I/O interface of the master chip, when only described data
When 3rd I/O interface of the master chip of read-write terminal detects low level, TF cards are exported by the first I/O interface of the master chip
Switching signal, when low level is detected simultaneously by, judges that output SD card switching signal or TF cards are cut according to default priority
Change signal.
7. the reading and writing data circuit of SD card and TF cards can be inserted as claimed in claim 3 simultaneously, it is characterised in that the read-write
The energization pins of chip connect the power pins of the SD card seat by lc circuit, also connect the TF cards by another lc circuit
The power pins of seat.
8. the reading and writing data circuit of SD card and TF cards can be inserted as claimed in claim 1 simultaneously, it is characterised in that the SD card
Switching signal is low level signal, and the TF cards switching signal is high level signal.
9. the reading and writing data circuit of SD card and TF cards can be inserted as claimed in claim 1 simultaneously, it is characterised in that the switching
Unit is the analog switch chip of model SGM5018.
10. the reading and writing data circuit of SD card and TF cards can be inserted as claimed in claim 1 simultaneously, it is characterised in that the reading
Chip is write for the serial integrated chip of model GL827.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410234361.2A CN104008079B (en) | 2014-05-29 | 2014-05-29 | Data reading and writing circuit capable of simultaneously inserting SD (secure digital memory) card and TF (trans-flash) card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410234361.2A CN104008079B (en) | 2014-05-29 | 2014-05-29 | Data reading and writing circuit capable of simultaneously inserting SD (secure digital memory) card and TF (trans-flash) card |
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| Publication Number | Publication Date |
|---|---|
| CN104008079A CN104008079A (en) | 2014-08-27 |
| CN104008079B true CN104008079B (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410234361.2A Active CN104008079B (en) | 2014-05-29 | 2014-05-29 | Data reading and writing circuit capable of simultaneously inserting SD (secure digital memory) card and TF (trans-flash) card |
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| CN105989382A (en) * | 2015-02-03 | 2016-10-05 | 天地融科技股份有限公司 | Real card management device and data interaction method |
| CN107886016A (en) * | 2016-09-29 | 2018-04-06 | 鸿富锦精密工业(武汉)有限公司 | The data protection system of electronic installation and the application electronic installation |
| CN107450850B (en) * | 2017-07-20 | 2020-11-13 | 广东铭基高科电子股份有限公司 | Memory card read-write protection device and control method thereof |
| CN108459981B (en) * | 2018-03-07 | 2023-12-22 | 深圳市显盈科技股份有限公司 | Multifunctional signal conversion circuit and converter |
| CN108595991B (en) * | 2018-04-12 | 2021-07-27 | 南宁磁动电子科技有限公司 | eMMC chip data reading device |
| CN109005404B (en) * | 2018-09-03 | 2020-02-14 | 深圳市度信科技有限公司 | Test system and method capable of detecting type of camera module |
| CN110163020B (en) * | 2019-04-25 | 2022-07-19 | 杭州电子科技大学 | Sensor data read-write device and read-write method thereof |
| CN113704154B (en) * | 2021-07-30 | 2024-02-23 | 浙江亚太智能网联汽车创新中心有限公司 | Universal interface integrated system and device for sensing system |
| TWI789147B (en) * | 2021-12-07 | 2023-01-01 | 瑞昱半導體股份有限公司 | Card reading device and electronic device with card reading function |
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| CN101674445A (en) * | 2008-09-10 | 2010-03-17 | 上海晨兴电子科技有限公司 | Multimedia signal receiving device with storage function |
| CN101771754A (en) * | 2008-12-31 | 2010-07-07 | 北京联想软件有限公司 | Mobile terminal and method for near-field communication thereof |
| CN102664037A (en) * | 2012-03-23 | 2012-09-12 | 广东远峰电子科技有限公司 | Control circuit for TF or SD card |
| CN102929749A (en) * | 2011-08-09 | 2013-02-13 | 中兴通讯股份有限公司 | Method and device for switching storage element and extension element on mobile terminal |
-
2014
- 2014-05-29 CN CN201410234361.2A patent/CN104008079B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101674445A (en) * | 2008-09-10 | 2010-03-17 | 上海晨兴电子科技有限公司 | Multimedia signal receiving device with storage function |
| CN101771754A (en) * | 2008-12-31 | 2010-07-07 | 北京联想软件有限公司 | Mobile terminal and method for near-field communication thereof |
| CN102929749A (en) * | 2011-08-09 | 2013-02-13 | 中兴通讯股份有限公司 | Method and device for switching storage element and extension element on mobile terminal |
| CN102664037A (en) * | 2012-03-23 | 2012-09-12 | 广东远峰电子科技有限公司 | Control circuit for TF or SD card |
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| CN104008079A (en) | 2014-08-27 |
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