CN107145370B - FLASH memory online burning device - Google Patents
FLASH memory online burning device Download PDFInfo
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- CN107145370B CN107145370B CN201710301173.0A CN201710301173A CN107145370B CN 107145370 B CN107145370 B CN 107145370B CN 201710301173 A CN201710301173 A CN 201710301173A CN 107145370 B CN107145370 B CN 107145370B
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Abstract
The invention provides an online burning device of a FLASH memory, comprising an online burning device; the input end flat cable of the online burning device is connected with the universal programmer, and the output end flat cable is connected with the electric connector which is connected with the FLASH memory on the PCB; the online burning device is provided with at least one level conversion chip, and the level conversion chip enables the level of each pin to complete the same level conversion. The invention successfully realizes the online burning of the FLASH memory. The invention avoids the damage to electronic components and printed circuit boards caused by the conventional FLASH memory burning method, and improves the reliability of products; meanwhile, the product debugging efficiency is improved, the upgrading and maintenance of product programs are facilitated, and the development cost and the maintenance cost of products are reduced.
Description
Technical Field
The invention relates to an on-line burning device for a FLASH memory.
Background
The conventional FLASH memory burning method is to directly insert the integrated circuit into a programmer for burning. A common programmer would provide a snap-in socket. If the integrated circuit is a 2.54mm pitch dual in-line package, the integrated circuit can be directly inserted into the programmer, the card can be locked with the integrated circuit, and then the compiled program can be loaded and written into the integrated circuit by using computer application software provided by the programmer. And after the burning is successful, releasing the buckle, and taking down the integrated circuit to complete the operation. If the integrated circuit is not a 2.54mm pitch dual in-line package, a mating adapter socket needs to be replaced and connected to the programmer for burn-in.
In general, our programs need to be modified and refined repeatedly, many problems can be found in the compiling and simulating stage, but many problems are reflected in the hardware debugging and testing. That is, after the program is burned into the integrated circuit, the integrated circuit needs to be installed on the printed circuit board for debugging and testing, and the program may need to be repeatedly modified during the debugging and testing process, so that the FLASH memory needs to be detached from the printed circuit board, the program is burned again by using the programmer, and then the printed circuit board is restored for debugging. Repeated disassembly and assembly may require numerous times. In a product with higher reliability requirement, the FLASH memory is welded on a printed circuit board, and repeated assembly and disassembly are very difficult. Therefore, not only the FLASH memory is easy to damage, but also the printed circuit board is damaged. Therefore, the conventional FLASH memory burning method is inconvenient for debugging programs, is not suitable for program upgrading of batch products, and particularly does not meet the related quality assurance requirements of missile-borne products.
Disclosure of Invention
In order to solve the technical problem, the invention provides an online burning device for a FLASH memory, which can realize online burning of the FLASH memory.
The invention is realized by the following technical scheme.
The invention provides an online burning device of a FLASH memory, comprising an online burning device; the input end flat cable of the online burning device is connected with the universal programmer, and the output end flat cable is connected with the electric connector which is connected with the FLASH memory on the PCB; the online burning device is provided with at least one level conversion chip, and the level conversion chip enables the level of each pin to complete the same level conversion.
The level conversion chip is three.
The level conversion chip is SN74LVC8T245 PW.
The level conversion chip level-converts from 5V to 3.3V or from 3.3V to 5V.
The front-stage flat cable of the online burning device is connected with the universal programmer through a matching cable.
And each pin at the input end of the online burning device is connected with a ground resistor in parallel.
And each pin at the output end of the online burning device is connected with a ground resistor in parallel.
And each pin on the output line of the level conversion chip of the online burning device is connected with a resistor in series.
And each power supply pin circuit of the level conversion chip of the online burning device is connected with a capacitor in parallel.
The invention has the beneficial effects that: the online burning of the FLASH memory is successfully realized. The damage of the conventional FLASH memory burning method to electronic components and a printed circuit board is avoided, and the reliability of the product is improved; meanwhile, the product debugging efficiency is improved, the upgrading and maintenance of product programs are facilitated, and the development cost and the maintenance cost of products are reduced.
Drawings
FIG. 1 is a schematic connection diagram of the present invention;
fig. 2 is a schematic diagram of the circuit principle of the present invention.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
An online FLASH memory burning device shown in fig. 1 and 2 comprises an online burning device; the input end flat cable of the online burning device is connected with the universal programmer, and the output end flat cable is connected with the electric connector which is connected with the FLASH memory on the PCB; the online burning device is provided with at least one level conversion chip, and the level conversion chip enables the level of each pin to complete the same level conversion.
The level conversion chip is three.
The level conversion chip is SN74LVC8T245 PW.
The level conversion chip level-converts from 5V to 3.3V or from 3.3V to 5V.
The front-stage flat cable of the online burning device is connected with the universal programmer through a matching cable.
And each pin at the input end of the online burning device is connected with a ground resistor in parallel.
And each pin at the output end of the online burning device is connected with a ground resistor in parallel.
And each pin on the output line of the level conversion chip of the online burning device is connected with a resistor in series.
And each power supply pin circuit of the level conversion chip of the online burning device is connected with a capacitor in parallel.
a) Matching cable
The matching cable is used for connecting the universal programmer and the online burning device. Connector at the matching cable both ends: one end is matched with the on-line programming device connector, and the other end is matched with the universal programmer socket. The cable in the middle of the matching cable uses a single core for connecting the connectors at both ends. The matching cable should ensure that the FLASH memory is in one-to-one correspondence with the pin function definitions of the general-purpose programmer.
b) Online burning device
The online programming device is used for realizing the level conversion function of each signal, and ensuring the use safety of the product when the programming voltage of the universal programmer is not consistent with the actual use voltage on the printed circuit board of the product. For example: the main control chip of the FLASH memory is a DSP, the power supply of its peripheral circuit is +3.3V, and the output signal level of the general-purpose programmer is +5V, in which case a corresponding level conversion has to be performed.
c) Product printed circuit board interface
The FLASH memory on the product printed circuit board is placed with an electric connector and is connected with the FLASH memory pins (including power supply, control bus, address bus and data bus pins). In the burning process, the online burning device supplies power to the FLASH memory and carries out burning by using a control line, an address line and a data line.
Thus, the present invention:
firstly, in the burning process, the FLASH memory on the product printed circuit board is not required to be disassembled and assembled;
and in the burning process, the possibility of mechanical damage and electric stress damage to the product is avoided.
Claims (8)
1. An online burning device for a FLASH memory comprises an online burning device and is characterized in that: the input end flat cable of the online burning device is connected with the universal programmer, and the output end flat cable is connected with an electric connector which is connected with the FLASH memory on the product printed circuit board on the PCB; the online burning device is provided with at least one level conversion chip, and the level of each pin is converted into the same level through the level conversion chip;
the front-stage flat cable of the online burning device is connected with the universal programmer through a matching cable; one end of a connector at the two ends of the matching cable is matched with the connector of the online programming device, and the other end of the connector is matched with the socket of the universal programmer; the cable in the middle of the matched cable uses a single core wire and is used for connecting the connectors at two ends; matching cables should ensure that the FLASH memories are in one-to-one correspondence with the pin function definitions of the universal programmer;
the online programming device is used for realizing the level conversion function of each signal, and ensuring the use safety of the product when the programming voltage of the universal programmer is not matched with the actual use voltage on the product printed circuit board;
when the device is used, the FLASH memory on the product printed circuit board is placed with an electric connector and is connected with the FLASH memory pin, and in the burning process, the on-line burning device can supply power to the FLASH memory and carry out burning through using a control line, an address line and a data line.
2. The FLASH memory online burning device of claim 1, wherein: the level conversion chip is three.
3. The FLASH memory online burning device of claim 1, wherein: the level conversion chip is SN74LVC8T245 PW.
4. The FLASH memory online burning device of claim 1, wherein: the level conversion chip level-converts from 5V to 3.3V or from 3.3V to 5V.
5. The FLASH memory online burning device of claim 1, wherein: and each pin at the input end of the online burning device is connected with a ground resistor in parallel.
6. The FLASH memory online burning device of claim 1, wherein: and each pin at the output end of the online burning device is connected with a ground resistor in parallel.
7. The FLASH memory online burning device of claim 1, wherein: and each pin on the output line of the level conversion chip of the online burning device is connected with a resistor in series.
8. The FLASH memory online burning device of claim 1, wherein: and each power supply pin circuit of the level conversion chip of the online burning device is connected with a capacitor in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710301173.0A CN107145370B (en) | 2017-05-02 | 2017-05-02 | FLASH memory online burning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710301173.0A CN107145370B (en) | 2017-05-02 | 2017-05-02 | FLASH memory online burning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107145370A CN107145370A (en) | 2017-09-08 |
| CN107145370B true CN107145370B (en) | 2020-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710301173.0A Active CN107145370B (en) | 2017-05-02 | 2017-05-02 | FLASH memory online burning device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112765694B (en) * | 2020-12-21 | 2022-08-30 | 贵州航天电子科技有限公司 | Design method of universal overload switch |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6301656B1 (en) * | 1999-01-11 | 2001-10-09 | Alcatel Usa Sourcing, L.P. | Method and apparatus for initial programming of flash based firmware |
| US6937493B2 (en) * | 2002-09-25 | 2005-08-30 | Siemens Aktiengesellschaft | Programming flash memory via a boundary scan register |
| CN106201617A (en) * | 2016-07-14 | 2016-12-07 | 青岛歌尔声学科技有限公司 | A kind of method and system of burning memorizer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219042B (en) * | 2013-04-23 | 2016-08-24 | 广州视源电子科技股份有限公司 | Circuit and the memory circuitry of burning program is realized by USB interface |
| CN203673831U (en) * | 2013-12-20 | 2014-06-25 | 广东美的制冷设备有限公司 | EEPROM on-line burning circuit and conditioner |
| CN204706026U (en) * | 2015-03-18 | 2015-10-14 | 华夏龙晖（北京）汽车电子科技股份有限公司 | A kind of program burn writing equipment of automobile electronic control unit |
| CN204965407U (en) * | 2015-09-16 | 2016-01-13 | 华夏龙晖（北京）汽车电子科技股份有限公司 | Car ECU programming and diagnostic equipment based on cell -phone terminal operations platform |
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2017
- 2017-05-02 CN CN201710301173.0A patent/CN107145370B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6301656B1 (en) * | 1999-01-11 | 2001-10-09 | Alcatel Usa Sourcing, L.P. | Method and apparatus for initial programming of flash based firmware |
| US6937493B2 (en) * | 2002-09-25 | 2005-08-30 | Siemens Aktiengesellschaft | Programming flash memory via a boundary scan register |
| CN106201617A (en) * | 2016-07-14 | 2016-12-07 | 青岛歌尔声学科技有限公司 | A kind of method and system of burning memorizer |
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| CN107145370A (en) | 2017-09-08 |
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