CN205015882U - Burn record ware switching card - Google Patents
Burn record ware switching card Download PDFInfo
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- CN205015882U CN205015882U CN201520794921.XU CN201520794921U CN205015882U CN 205015882 U CN205015882 U CN 205015882U CN 201520794921 U CN201520794921 U CN 201520794921U CN 205015882 U CN205015882 U CN 205015882U
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- circuit
- rom recorder
- adapter
- record
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Abstract
The utility model discloses a burn record ware switching card, it includes the golden finger interface, golden finger interface type end is connected with and burns the record ware, and the output is connected with integrated circuit chip, and input -output ports is connected with 24C02 storage ID circuit, VPP voltage conversion circuit, VDD voltage conversion circuit, OP fever record signal voltage conversion circuit, OP burns record signal voltage converting circuit and includes that 3.3V changes the one -way converting circuit of 3.3V level to the two -way converting circuit, 5V of 5V level, and it can be simplified the IC fever and record the operation, can accomplish the different kinds of different IC's of encapsulation fever through same fever record ware and record, improves the record speed of burning, improves integrated circuit's production efficiency.
Description
Technical field
The utility model relates to electronic technology field, refers more particularly to a kind of cd-rom recorder adapter.
Background technology
Cd-rom recorder is for different model IC, and during the IC burning of pin package different from same model, under IC burning pin uncertain condition, high voltage programming signal VPP, VDD and OPx programming signal will be delivered on the burning pins such as VPP, VDD, OPx of IC by cd-rom recorder; And the burning pin position of every type IC is uncertain, programming signal is also different.Particularly the required VPP kind of IC is many, has 12V, 11.5V, 9.5V, 9.0V, 6.5V etc., and VDD also has 5V, 3.3V to distinguish; And later stage IC model increases, the VPP needed for possibility is not identical again, if these problems are all processed by cd-rom recorder, just considerably increases the development difficulty of cd-rom recorder.
Utility model content
The purpose of this utility model is for above problem, a kind of cd-rom recorder adapter is provided, cd-rom recorder can export various programming signal from fixing several IO, and the programming signal that adapter is responsible for cd-rom recorder exports is transferred on the burning pin of corresponding IC, and is responsible for the voltage transitions of VPP, VDD, OPx; Dissimilar IC burning only needs the adapter changing corresponding model, can complete dissimilar, and the burning of different encapsulation IC, reduces cd-rom recorder difficult design greatly.
For realizing above object, the technical solution adopted in the utility model is: a kind of cd-rom recorder adapter, it comprises golden finger interface, described golden finger interface input end is connected with cd-rom recorder, output terminal is connected with integrated circuit (IC) chip, and input/output port is connected with 24C02 and stores ID circuit, vpp voltage change-over circuit, vdd voltage change-over circuit, OP programming signal voltage conversion circuit; Described OP programming signal voltage conversion circuit comprises 3.3V to 5V level bi-directional conversion circuit, and 5V turns the unidirectional change-over circuit of 3.3V level.
Further, described golden finger interface adopts 50pin interface.
Further, described 24C02 stores ID circuit and adopts AT24C02 chip.
Further, described vpp voltage change-over circuit adopts TL431 preferred circuit.
Further, described vdd voltage change-over circuit adopts 7533 voltage conversion circuits.
Further, described 5V turns 3.3V level unidirectional change-over circuit employing resistor voltage divider circuit.
The beneficial effects of the utility model:
1. this cd-rom recorder adapter can make the design of cd-rom recorder become simplification, and it does not need the connection considering various IC burning pin, does not need the voltage transitions of VPP, VDD, OPx signal considering various IC yet.Cd-rom recorder only needs to export various programming signal from fixing several IO, and the adapter then programming signal be responsible for cd-rom recorder exports is transferred on the burning pin of corresponding IC, and is responsible for the voltage transitions of VPP, VDD, OPx.
2. adapter can process these things flexibly, and dissimilar IC burning only needs the adapter changing corresponding model, can complete dissimilar, the burning of different encapsulation IC.So just greatly reduce the difficulty that cd-rom recorder design is got up.
3. structure is simple, and easy to operate, cost is low.
Accompanying drawing explanation
Fig. 1 is the utility model general frame figure.
Fig. 2 is golden finger interface circuit diagram in the utility model.
Fig. 3 is that in the utility model, 24C02 stores ID circuit.
Fig. 4 is vpp voltage change-over circuit in the utility model.
Fig. 5 is vdd voltage change-over circuit in the utility model.
Fig. 6 is 3.3V to 5V level bi-directional conversion circuit in the utility model.
Fig. 7 is that in the utility model, 5V turns the unidirectional change-over circuit of 3.3V level.
Embodiment
The technical solution of the utility model is understood better in order to make those skilled in the art; below in conjunction with accompanying drawing, the utility model is described in detail; the description of this part is only exemplary and explanatory, should not have any restriction to protection domain of the present utility model.
As shown in figs. 1-7, anatomical connectivity of the present utility model closes: a kind of cd-rom recorder adapter, it comprises golden finger interface, described golden finger interface input end is connected with cd-rom recorder, output terminal is connected with integrated circuit (IC) chip, and input/output port is connected with 24C02 and stores ID circuit, vpp voltage change-over circuit, vdd voltage change-over circuit, OP programming signal voltage conversion circuit; Described OP programming signal voltage conversion circuit comprises 3.3V to 5V level bi-directional conversion circuit, and 5V turns the unidirectional change-over circuit of 3.3V level.
Preferably, described golden finger interface adopts 50pin interface.
Preferably, described 24C02 stores ID circuit and adopts AT24C02 chip.
Preferably, described vpp voltage change-over circuit adopts TL431 preferred circuit.
Preferably, described vdd voltage change-over circuit adopts 7533 voltage conversion circuits.
Preferably, described 5V turns 3.3V level unidirectional change-over circuit employing resistor voltage divider circuit.
Schematic diagram is set forth:
As Fig. 1: adapter block diagram: (signal is uncertain: MCU kind is different for the programming signal that cd-rom recorder exports, programming signal is different), after golden finger interface input, again through various voltage conversion circuit (vpp voltage change-over circuit, vdd voltage change-over circuit, OP programming signal voltage conversion circuit), obtain the various voltage signals that IC burning needs, then be transferred on burning pin corresponding to IC through golden finger.Namely automatic transfer and the voltage transitions of programming signal is completed.Wherein card extender also has a 24C02 memory circuit, be used for storing the id information of card extender, so that upper cd-rom recorder identifies adapter model automatically.
As Fig. 2: golden finger interface: this interface is 50PIN interface.
Wherein: PIN1: be the ground of cd-rom recorder and adapter, altogether;
PIN50: to power pin for 24C02 on adapter stores the VDD of IC, powered by cd-rom recorder;
PIN49: for 24C02 on adapter stores the SDA data pin of IC;
PIN47: for 24C02 on adapter stores the SCL clock pin of IC;
Then 14 PIN are VPP, VDD, OPx (5V) signal pins that cd-rom recorder exports below.
PIN2: be the VPP signal output pin of cd-rom recorder, for 12V exports;
PIN3: be the PIN1 signal output pin of cd-rom recorder, for 5V exports;
PIN4: be the PIN0 signal output pin of cd-rom recorder, for 5V exports;
PIN48: be the OP0 signal output pin of cd-rom recorder, for 5V exports;
PIN45: be the OP1 signal output pin of cd-rom recorder, for 5V exports;
PIN46: be the OP2 signal output pin of cd-rom recorder, for 5V exports;
PIN43: be the OP3 signal output pin of cd-rom recorder, for 5V exports;
PIN44: be the OP4 signal output pin of cd-rom recorder, for 5V exports;
PIN41: be the OP5 signal output pin of cd-rom recorder, for 5V exports;
PIN42: be the OP6 signal output pin of cd-rom recorder, for 5V exports;
PIN39: be the OP7 signal output pin of cd-rom recorder, for 5V exports;
PIN40: be the OP8 signal output pin of cd-rom recorder, for 5V exports;
PIN38: be the OP9 signal output pin of cd-rom recorder, for 5V exports;
PIN37: be the VDD signal output pin of cd-rom recorder, for 5V exports;
Be left:
PIN5-PIN36 be programming signal after the connection and level conversion of golden finger, be connected to the burning pin of IC.The burning pin of each IC is different, so the PIN position that this place is transferred to is also different.
As Fig. 3: 24C02 memory circuit: be used for storing adapter id information, after being convenient to adapter insertion, cd-rom recorder can identify the model of adapter automatically.
As Fig. 4: vpp voltage change-over circuit: the TL431 circuit adopting standard, the different card extenders corresponding according to different IC, arrange the ratio of different R2/R1, obtain desired vpp voltage, have 12V, 11.5V, 9.5V, 9.0V, 6.5V etc.The voltage obtained is transferred to one of them PIN in PIN5-PIN36 again, completes conversion and the switching of vpp voltage.
If the burning voltage VPP of some IC is 12V, then adapter does not need VPP change-over circuit, directly VPP signal (12V) output pin that cd-rom recorder exports is connected to the wherein corresponding VPP pin of PIN5-PIN36.
As Fig. 5: vdd voltage change-over circuit: 7533 circuit adopting standard, the 5VVDD that cd-rom recorder exports is directly changed into the 3.3VVDD signal needed for IC.
If the VDD of some IC is 5V, then adapter does not need VDD change-over circuit, directly VDD signal (5V) output pin that cd-rom recorder exports is connected to the wherein corresponding VDD pin of PIN5-PIN36.
As Fig. 6: 3.3V and 5V level bi-directional conversion circuit: adopt classical bidirectional level conversion circuit.Because some IC can only power by 3.3V, so the OP programming signal that cd-rom recorder exports needs to be converted to 3.3V, could be read by IC; Some OP signal is two-way communication, and cd-rom recorder only identifies the low and high level of 5V, so the 3.3VOP signal demand that IC returns is converted to 5VOP signal, could be read by cd-rom recorder.
During OPx (3.3) end output low level (0V), metal-oxide-semiconductor conducting, OPx (5) holds output to be low level (0V)
When OPx (3.3) end exports high level (3.3V), metal-oxide-semiconductor holds output to be high level (5V) by, OPx (5)
When OPx (3.3) end exports high resistant (OC), metal-oxide-semiconductor holds output to be high level (5V) by, OPx (5)
During OPx (5) end output low level (0V), the diode current flow in metal-oxide-semiconductor, thus make metal-oxide-semiconductor conducting, OPx (3.3) holds output to be low level (0V)
When OPx (5) end exports high level (5V), metal-oxide-semiconductor holds output to be high level (3.3V) by, OPx (3.3)
When OPx (5) end exports high resistant (OC), metal-oxide-semiconductor holds output to be high level (3.3V) by, OPx (3.3)
If the VDD of some IC is 5V, then adapter does not need 3.3V and 5V level bi-directional conversion circuit conversion circuit, directly OPx (5V) output pin that cd-rom recorder exports is connected to the wherein corresponding OPx pin of PIN5-PIN36.
As Fig. 7: 5V turns the unidirectional change-over circuit of 3.3V level: directly adopt resistance to carry out dividing potential drop, 5V is divided into 3.3V and exports.Because some signal is unidirectional, as clock programming signal, be flow to IC from cd-rom recorder is unidirectional, not needing IC to return, is unidirectional again, in order to simplify circuit, thrifty cost, 5V directly adopt electric resistance partial pressure mode to be reduced to clock programming signal pin that 3.3V exports to IC.
If the VDD of some IC is 5V, then adapter does not need 5V to turn the unidirectional change-over circuit of 3.3V level, directly OPx (5V) output pin that cd-rom recorder exports is connected to the wherein corresponding OPx pin of PIN5-PIN36.
It should be noted that, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.
Apply specific case herein to set forth principle of the present utility model and embodiment, the explanation of above example just understands method of the present utility model and core concept thereof for helping.The above is only preferred implementation of the present utility model, should be understood that, due to the finiteness of literal expression, and objectively there is unlimited concrete structure, for those skilled in the art, under the prerequisite not departing from the utility model principle, some improvement, retouching or change can also be made, also above-mentioned technical characteristic can be combined by rights; These improve retouching, change or combination, or the design of utility model and technical scheme are directly applied to other occasion without improving, and all should be considered as protection domain of the present utility model.
Claims (6)
1. a cd-rom recorder adapter, it comprises golden finger interface, it is characterized in that, described golden finger interface input end is connected with cd-rom recorder, output terminal is connected with integrated circuit (IC) chip, and input/output port is connected with 24C02 and stores ID circuit, vpp voltage change-over circuit, vdd voltage change-over circuit, OP programming signal voltage conversion circuit; Described OP programming signal voltage conversion circuit comprises 3.3V to 5V level bi-directional conversion circuit, and 5V turns the unidirectional change-over circuit of 3.3V level.
2. a kind of cd-rom recorder adapter as claimed in claim 1, is characterized in that, described golden finger interface adopts 50pin interface.
3. a kind of cd-rom recorder adapter as claimed in claim 1, is characterized in that, described 24C02 stores ID circuit and adopts AT24C02 chip.
4. a kind of cd-rom recorder adapter as claimed in claim 1, is characterized in that, described vpp voltage change-over circuit adopts TL431 preferred circuit.
5. a kind of cd-rom recorder adapter as claimed in claim 1, is characterized in that, described vdd voltage change-over circuit adopts 7533 voltage conversion circuits.
6. a kind of cd-rom recorder adapter as claimed in claim 1, is characterized in that, described 5V turns the unidirectional change-over circuit of 3.3V level and adopts resistor voltage divider circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520794921.XU CN205015882U (en) | 2015-10-14 | 2015-10-14 | Burn record ware switching card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520794921.XU CN205015882U (en) | 2015-10-14 | 2015-10-14 | Burn record ware switching card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205015882U true CN205015882U (en) | 2016-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520794921.XU Expired - Fee Related CN205015882U (en) | 2015-10-14 | 2015-10-14 | Burn record ware switching card |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205015882U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106020911A (en) * | 2016-06-02 | 2016-10-12 | 广东盈科电子有限公司 | Microcontroller burning interface and circuit board connection multiplexing method |
| CN112735309A (en) * | 2020-12-04 | 2021-04-30 | 安徽金视界光电科技有限公司 | STN liquid crystal display OTP (one time programmable) burning instrument and burning method |
| CN116755727A (en) * | 2023-08-21 | 2023-09-15 | 湖南博匠信息科技有限公司 | Intelligent upgrading method and system for firmware of embedded device |
-
2015
- 2015-10-14 CN CN201520794921.XU patent/CN205015882U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106020911A (en) * | 2016-06-02 | 2016-10-12 | 广东盈科电子有限公司 | Microcontroller burning interface and circuit board connection multiplexing method |
| CN112735309A (en) * | 2020-12-04 | 2021-04-30 | 安徽金视界光电科技有限公司 | STN liquid crystal display OTP (one time programmable) burning instrument and burning method |
| CN116755727A (en) * | 2023-08-21 | 2023-09-15 | 湖南博匠信息科技有限公司 | Intelligent upgrading method and system for firmware of embedded device |
| CN116755727B (en) * | 2023-08-21 | 2023-11-03 | 湖南博匠信息科技有限公司 | Intelligent upgrading method and system for firmware of embedded device |
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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: 20160203 Termination date: 20201014 |