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What if the universal programmer performing unstable ?

日期: 2020-05-13
浏览次数: 13
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浏览次数: 13
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Now the universal programmer that integrates programming and testing has received more attention. In order to improve the efficiency of programming, some fixtures and programming tools are usually made. Long wiring is required between the fixture, tooling and programmer, and the length of the wiring will affect the strength of signal transmission. Generally speaking, the longer the wiring, the weaker the signal. When the signal is weak, the bad programming rate also increases. How to solve the problem of unstable programming process of the programmer?


What if the programmer performing unstable ?

 

First , increasing the shielding layer to prevent electromagnetic interference; as a tool to maintain close communication with the programming chip, the programmer is very sensitive to electromagnetic interference. The application environment for programming is generally a factory workshop, however, high-power equipment will make the electromagnetic interference more serious. In order to reduce the degree of interference as much as possible, you can add a shielded network to the programming line, or directly use a cable with a shielding function, such as: shielded network cable, cable, etc. In addition, it is best to wear static gloves during operation to prevent interference.

 

Second, choosing a more conductive wire. Generally speaking, you should choose a thicker wire. The length, thickness and material of the wire will affect the signal transmission. Choosing a good wire can reduce the internal resistance and reduce the loss of the signal. Common copper wire, silver-plated wire, gold-plated wire, etc. are common.

 

There is also the need to reduce the frequency of communication. Communication frequency is an important reference data for information transmission. The higher the frequency, the faster the transmission speed, but the signal will decrease as the frequency increases. Therefore, when the wiring is relatively long, the communication frequency can be appropriately reduced to increase the stability of the communication.

 

In addition, a resistor can be connected to the signal line. The programming interface of some chips has a weak driving ability. A pull-down resistor can be added to the interface to enhance the driving force. Of course, you can also choose a programmer with a strong driving ability. The driving ability of the programmer directly affects the length of the wiring. There are online programmers on the market that directly lead the IO port of the internal control chip or the pin of the FPGA as the output of the programming signal Input, if the driving ability is weak, the signal will be distorted when the wiring is relatively long, resulting in unstable programming. The processing method is to enhance the multi-channel signal, increase the drive capacity of the programmer, and solve the problem of long wiring.


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  • 点击次数: 13
    2020 - 05 - 13
    Now the universal programmer that integrates programming and testing has received more attention. In order to improve the efficiency of programming, some fixtures and programming tools are usually made. Long wiring is required between the fixture, tooling and programmer, and the length of the wiring will affect the strength of signal transmission. Generally speaking, the longer the wiring, the weaker the signal. When the signal is weak, the bad programming rate also increases. How to solve the problem of unstable programming process of the programmer? First , increasing the shielding layer to prevent electromagnetic interference; as a tool to maintain close communication with the programming chip, the programmer is very sensitive to electromagnetic interferenc...
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