What does the burning program mean? What does PCBA burning program mean?

Date：2022-01-14 16:23:00Views：2605

In the process of PCBA processing, in order to enable the PCB board to realize some specific functions, in addition to the hardware, there is also software, which needs to add the program of "burning" in the PCBA processing process, that is, to "carry" the program into the IC. Before starting "burning", we should test whether the PCB board is qualified, and then select the appropriate burning method.

Chip burning is an important link in the production of electronic products. The efficiency is an important aspect of customer concern. The current burning methods are generally divided into offline burning and online burning.

Program burning is to load the original program into the computer after compilation and processing, and let the computer execute the written program. For example, when the MCU program is burned, it is loaded Hex file, stored in the single chip microcomputer, can realize the written program when starting up. In short, the process of enabling the microcomputer to start up and execute the program is program burning.

Offline burning: through the link between the adapter and chips of different packages, the program can be burned only when the chip is used with the adapter. The essence of the adapter is similar to a precision fixture. Different packaged chips need to be matched with different adapter seats.

If an error occurs during production test and the production is traced back and corrected again, the chip needs to be removed from the adapter and burned again according to the specified process, which consumes a lot of manpower and material resources, costs a lot, and is prone to problems. Therefore, offline burning is generally not recommended.

Online burning: Online burning uses the standard communication bus of the chip, such as USB, SWD, JTAG, UART, etc. the interface is generally fixed, and there are few pins to be connected during burning. Because the interface communication rate is not high, the burning can be completed by using general wire, which will not produce high consumption.

Online burning is to burn the program through wire connection. If an error is found during production test, it can be burned again without dismantling the chip. It not only saves the production cost, but also increases the burning efficiency. Therefore, online burning is generally used now.

Process capability of PCBA burning program

1. Open, short, detection of wrong parts, missing parts, monument erection, bridge erection and reverse polarity.

2. It can measure resistance, capacitor, inductor, transistor, diode, zener diode, triode optocoupler, relay, field effect transistor test (FET), IC, connector and other parts.

3. Through the testjet, you can measure the open and short circuit of the connector of the pin row or the IC part with the welding pin outside without pin points.

4. DC / AC voltage measurement and frequency measurement.

5. Electrical function test. Can execute low-level programs for self-test.

6. [boundary scan / JTAG] can be used to test the function of active parts.

7. It can automatically download software or operating system into the memory of the circuit board.

Quality control of PCBA burning program

1. The quality control department shall organize the Department responsible for nonconformity or nonconformity or the defect discovery department to review the nonconformity and establish a problem solving team.

2. For potential defects or nonconformities, analyze them by using tools such as test, simulation, data analysis and QC techniques, carry out appropriate error proof design and quality control, and put forward preventive measures and plans.

3. For the defective or non-conforming items that have occurred, the problem solving team shall review and approve again, revise relevant technologies, quality standards or improve the process or design level, confirm whether there are similar problems in all products or processes related to the quality system, carry out comprehensive prevention and put forward solutions.

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