The chip burning test company analyzes the causes of abnormal burning

Date：2021-09-10 14:12:00Views：1389

A program is needed to miniaturize all components into one or several integrated circuits; An integrated circuit that can receive coding instructions at one or more ends, execute the instructions and output signals describing its state, and the process of storing programs in the chip is called chip burning. Sometimes there is a strange phenomenon in chip burning. For example, the programmer prompts pass in the whole process, but the product cannot be used normally after the chip is pasted. This phenomenon will naturally be the first suspected equipment problem. Next, let's get to know the relevant contents together with the creative core detection Xiaobian.

In order to make the test more rigorous and reproduce the problem, we learned about the chips and files burned by the customer for testing. Through the test, it is found that burning files are not common: the burning files of the chip need to be converted into two files, but they are not correctly transferred to these two files during use. Under the guidance, the customer completed the test without abnormal feedback.

The common idea must be to look at:

Whether there is a defect rate in the batch chip itself;

Test whether the burning equipment is normal.

If no problems are found in these two points, novice engineers will have a headache. Why is my chip normal and the mass production equipment is also the equipment for R & D and testing? Why not?

Because several implicit problems are often ignored:

Although the mass production burning equipment is consistent with the equipment in the R & D and test stage, do they all use the original simulator? Or other special burning equipment not suitable for mass production?

It should be noted here that in terms of burning chips, the special mass production burner / programmer can realize one key operation, which is suitable for mass production by factory personnel with weak foundation and can ensure mass production. The original simulator is oriented to R & D, and the operation process can not be so simple. It may be necessary to operate the upper computer button every time, or it may be necessary to connect and then burn the human possibility of operation error.

Moreover, the feedback of simulator burning results is not obvious, which may be a printed string, a buzzer, a light signal, etc. For the actual production personnel in the factory with weak professional knowledge, they may make mistakes because they do not understand the principle. Finally, the simulator is not a mass production equipment and does not guarantee the output.

2. If the selected burner / programmer is mass-produced, is it online burning? Or zuoka? If programmer adapter / chip clamp is required, does the clamp have maintenance problems? What is the current fixture life?

This is often overlooked. If the equipment is already a mass production programmer and the previous burning is normal, it depends on how long your burning fixture, commonly known as the burning base, or the programmer adapter has been used. The burning clip has a number of times of use, that is, the service life. However, at present, most domestic manufacturers do not provide customers with professional operation manuals or maintenance documents of burning stand / fixture, so it is difficult to download the corresponding online. Many minor faults such as poor contact come from the burning base.

If the burning times are close to the service life of the burning base, it depends on whether the contact between the fixture of the burning base and the chip pin is damaged due to frequent chip collision or uneven pressing pressure. Most of the small problems come from here. The simplest test method is to change another burning base for comparative test, which can quickly locate the problem.

Other possible bad burning conditions also include the incompatibility between the upper computer software of the programmer and the chip, and the need to update the firmware package. These will continue to be discussed later. Finally, remind engineers that the burning seat should pay attention to maintenance. Refer to the standard programmer adapter maintenance manual of the regular company, and use pressure aids such as pressure rods if necessary, Maximize the service life of the burning base.

So how to simply judge the cause of this phenomenon? The careful engineer summarized some field experience, which is very practical.

1. Small batch verification shall be conducted before mass production, and mass production shall be carried out after verification to avoid large losses;

2. Ask the corresponding software engineer to give accurate guidance and describe the configuration parameters in detail to ensure the accuracy of burning;

3. Limit the available operations during production and assign the authority to necessary personnel to avoid misoperation.

The above is the related content of "cause analysis of abnormal chip burning" brought by the core detection. Through this article, I hope it can be helpful to you. If you like this article, you might as well continue to pay attention to our website, and we will bring more wonderful content later. If you have any needs related to the inspection and testing of electronic products, please call Chuangxin testing, and we will serve you wholeheartedly.