CN205899547U - Card treatment circuit - Google Patents
Card treatment circuit Download PDFInfo
- Publication number
- CN205899547U CN205899547U CN201620699355.9U CN201620699355U CN205899547U CN 205899547 U CN205899547 U CN 205899547U CN 201620699355 U CN201620699355 U CN 201620699355U CN 205899547 U CN205899547 U CN 205899547U
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- CN
- China
- Prior art keywords
- card
- resistance
- microprocessor
- plug
- multiplexing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a card treatment circuit, includes a microprocessor, wherein, this microprocessor provides the operation clock signal and catches the plug -in card being location signal of this electron card for an electron card through a multiplexing inputoutput port, at initial condition, this multiplexing inputoutput port sets input port to for catch this plug -in card being location signal, in case catch this plug -in card being location signal, this multiplexing inputoutput port then set output port to. The utility model discloses the restriction of chooseing for use to microprocessor can be reduced, the face broad is suitable for.
Description
Technical field
This utility model is related to the work of card process circuit, the more particularly, to input/output port of microprocessor and electronic card
Make the annexation between clock port.
Background technology
Annexation between the work clock port of the input/output port of existing microprocessor and electronic card, referring to
Shown in Fig. 1.Microprocessor u1 connects the work on the electric connector j1 of electronic card by a special output port sd_sclk
Make clock terminal sd5_clk, to provide an operating clock signals s_clk.Specifically, when output port sd_sclk and work
It is serially connected with resistance r317, work clock terminal sd5_clk is simultaneously pulled upward to power supply by resistance r304 between clock terminal sd5_clk
dspvcc33.
In order to ensure the driven of electronic card, between the electric connector j1 of microprocessor u1 and electronic card, also have multiple companies
Connect, for example: microprocessor u1 connects the electric connector j1 of electronic card by a special input port card_insert#
Card insertion put in place terminal sd11_cd and ms6_ins, put in place signal/card_insert with capturing a plug-in card.Specifically, block
Insert terminal sd11_cd and ms6_ins that put in place to be connected with microprocessor u1 via resistance r325, and be pulled upward to by resistance r300
Power supply dspvcc33.
In addition, microprocessor u1 connects the electric connector j1's of electronic card by a special output port sd_cmd
Command terminals sd2_cmd；Specifically, command terminals sd2_cmd are connected with microprocessor u1 via resistance r315, and by electricity
Resistance r305 is pulled upward to power supply dspvcc33.Microprocessor u1 pass through four special FPDP sd_d0, sd_d1, sd_d2 and
Sd_d3 connect to correspond to four data terminal sd7_dat0, sd8_dat1 of electric connector j1 of electronic card, sd9_dat2 and
sd1_dat3.Specifically, four data terminal sd7_dat0, sd8_dat1, sd9_dat2 and sd1_dat3 are respectively via electricity
Resistance r320, r321, r322 and r313 are connected with microprocessor u1, and pass through resistance r303, r302, r301 and r306 pull-up respectively
To power supply dspvcc33.
It can be seen that, the port that existing this annexation takies microprocessor u1 is more, the selection structure to microprocessor u1
Become certain restriction, applicable surface is narrower.
Utility model content
The technical problems to be solved in the utility model is to overcome the shortcomings of that above-mentioned prior art exists, and proposes a kind of card
Process circuit, can reduce the restriction of the selection to microprocessor, and applicable surface is wider.
The technical scheme that this utility model is directed to above-mentioned technical problem and proposes includes, and proposes a kind of card process circuit, bag
Include a microprocessor, wherein, this microprocessor passes through the input/output port of a multiplexing, comes for during an electronic card offer job
Clock signal simultaneously captures the plug-in card of this electronic card and puts in place signal；In original state, the input/output port of this multiplexing is arranged to input
Port, puts in place signal for capturing this plug-in card, once capture this plug-in card putting in place signal, the input/output port of this multiplexing is transferred
It is arranged to output port.
In certain embodiments, it is serially connected with the first isolation between the input/output port of this multiplexing and this operating clock signals
Resistance；This operating clock signals and this plug-in card put in place and are serially connected with the second isolation resistance between signal.
In certain embodiments, this operating clock signals is connected with working power by pull-up resistor.
In certain embodiments, the resistance of this pull-up resistor is 10 kilohms.
In certain embodiments, the resistance of this second isolation resistance is 1 kilohm.
In certain embodiments, the resistance of this first isolation resistance is 33 ohm.
In certain embodiments, this electronic card be sd card, mmc card or ms card.
Compared with prior art, card process circuit of the present utility model, defeated by dexterously passing through an input being multiplexed
Exit port, to provide operating clock signals for an electronic card and capture the plug-in card of this electronic card and put in place signal, can save one
Port, and then the restriction of the selection to microprocessor can be reduced, applicable surface is wider.
Brief description
Fig. 1 is the electric principle schematic of existing card process circuit.
Fig. 2 is the electric principle schematic of card process circuit of the present utility model.
Specific embodiment
Below in conjunction with accompanying drawing, this utility model is given with further elaboration.
Referring to Fig. 2, Fig. 2 is the electric principle schematic of card process circuit of the present utility model.Card of the present utility model is processed
Circuit can be with such as sd(secure digital memory card, safe digital card) card, mmc(multi media
Card, multimedia card) card or ms(memory stick, memory stick) electronic card of card etc uses cooperatively.This card processes electricity
Road includes a microprocessor u1 and electric connector j1 of the electronic card being connected with this microprocessor u1.Wherein, this microprocessor u1
By the input/output port sd_sclk of a multiplexing, to provide operating clock signals s_clk for an electronic card and capture this electricity
The plug-in card of subcard puts in place signal/card_insert.Wherein, in original state, the input/output port sd_sclk of this multiplexing sets
Be set to input port, put in place signal/card_insert for capturing this plug-in card, once capture this plug-in card put in place signal/
Card_insert, the input/output port sd_sclk of this multiplexing transfers to be arranged to output port, for providing for this electronic card
Operating clock signals s_clk.
Specifically, it is serially connected with first between the input/output port sd_sclk of this multiplexing and this operating clock signals s_clk
Isolation resistance r317.This operating clock signals s_clk and this plug-in card put in place be serially connected between signal/card_insert second every
From resistance r325.This operating clock signals s_clk is connected with working power dspvcc33 by pull-up resistor r304.In this enforcement
In example, the resistance of this first isolation resistance r317 is 33 ohm.The resistance of this second isolation resistance r325 is 1 kilohm.On this
Resistance r304 of pull-up resistor is 10 kilohms.The load voltage value of this working power dspvcc33 is 3.3v.
Compared with prior art, this utility model passes through dexterously to make microprocessor u1 first will be multiplexed input/output port
Sd_sclk be initialized as gpio(universal input output) input direction, the detection port whether inserted as electronic card；When having
When electronic card insertion puts in place, then microprocessor u1 is made to transfer the gipo state of this multiplexing input/output port sd_sclk
It is configured to outbound course, to provide the operating clock signals s_clk of electronic card；This design can save a port (i.e. Fig. 1
In input port card_insert#) use, can also save simultaneously corresponding resistance (i.e. resistance r300 in Fig. 1) and
Decoupling capacitor (not shown), and then the restriction of the selection to microprocessor u1 can be reduced, applicable surface is wider.
The above, preferred embodiment only of the present utility model, it is not intended to limit embodiment of the present utility model,
Those of ordinary skill in the art, according to central scope of the present utility model and spirit, can very easily carry out corresponding accommodation
Or modification, therefore protection domain of the present utility model should the protection domain required by by claims be defined.
Claims (7)
1. a kind of card process circuit, including a microprocessor it is characterised in that this microprocessor is defeated by the input of a multiplexing
Exit port, to provide operating clock signals for an electronic card and capture the plug-in card of this electronic card and put in place signal；In original state, should
The input/output port of multiplexing is arranged to input port, puts in place signal for capturing this plug-in card, once capture this plug-in card putting in place
Signal, the input/output port of this multiplexing transfers to be arranged to output port.
2. according to the card process circuit described in claim 1 it is characterised in that when the input/output port of this multiplexing and this work
It is serially connected with the first isolation resistance between clock signal；This operating clock signals and this plug-in card put in place and are serially connected with the second isolation between signal
Resistance.
3. according to the card process circuit described in claim 2 it is characterised in that this operating clock signals passes through pull-up resistor and work
Make power supply to be connected.
4. according to the card process circuit described in claim 3 it is characterised in that the resistance of this pull-up resistor is 10 kilohms.
5. according to the card process circuit described in claim 2 it is characterised in that the resistance of this second isolation resistance is 1 kilohm.
6. according to the card process circuit described in claim 2 it is characterised in that the resistance of this first isolation resistance is 33 ohm.
7. according to the card process circuit described in any one of claim 1 to 6 it is characterised in that this electronic card be sd card, mmc card
Or ms card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620699355.9U CN205899547U (en) | 2016-07-05 | 2016-07-05 | Card treatment circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620699355.9U CN205899547U (en) | 2016-07-05 | 2016-07-05 | Card treatment circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205899547U true CN205899547U (en) | 2017-01-18 |
Family
ID=57771576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620699355.9U Expired - Fee Related CN205899547U (en) | 2016-07-05 | 2016-07-05 | Card treatment circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205899547U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113703449A (en) * | 2021-08-20 | 2021-11-26 | 深圳市海拓天城科技有限公司 | Sweeper circuit with control system |
-
2016
- 2016-07-05 CN CN201620699355.9U patent/CN205899547U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113703449A (en) * | 2021-08-20 | 2021-11-26 | 深圳市海拓天城科技有限公司 | Sweeper circuit with control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170118 Termination date: 20210705 |