新闻详情
Home > News > Content

Recycling mobile phone motherboard internal storage data loss

Recycling mobile phone motherboard memory is divided into two categories: program memory and data memory. Data memory, also known as scratchpad (RAM), is mainly used to store the intermediate data generated when the phone is currently running. If it is turned off, the content disappears completely. It is consistent with the function of the memory we often talk about in computers. The program memory of the mobile phone is mostly composed of two parts, one is FLASHROM (commonly known as font or version); the other is EEPROM (commonly known as chip). But there are also a few mobile phone program memory is an integrated circuit (such as Nokia 3310, Motorola L2000, T2688 mobile phones, etc.). In addition, some mobile phones combine FLASHROM and RAM into one (such as Ericsson T18 mobile phone), so you can't see RAM in your mobile phone.


The program memory of the mobile phone is a read-only memory. That is to say, when the mobile phone is working, only the data data therein can be read, and the data cannot be written into the memory, but the read-only memory is not really "read only", that is, It is said that under certain conditions, data can also be written into the read-only memory. Various software maintenance instruments are used to repair the mobile phone by writing data into the memory.

Futian District, Shenzhen, Yueyue Blueprint Electronic Firm is a new type of professional recycling LPDDR company, mainly engaged in the recycling and supply of electronic components and electronic inventory;


The software failure of recycling the phone's motherboard mainly occurs in the program memory data loss or logic confusion. The characteristics that are expressed are the lock machine, the display "see the supplier" and so on. Various types of mobile phones use a lot of fonts (versions) and chips, but their functions are basically the same regardless of changes.

Chip failures are divided into two cases, one is the chip itself hardware damage; the other is the internal storage data loss, hardware damage is not much, mainly software data loss. When the digital is lost, “PhoneLOCked” will appear, indicating “CON-TACTSERVICE” or a low power alarm or black screen. Since the EEPROM can be erased electrically, it can be rewritten when data loss occurs.

The recycling mobile phone motherboard is classified according to the number of pins, and the chips can be divided into two categories: 28-pin and 8-pin. One type is a 28-pin chip (such as 28C64, 28LV64); it is mainly used in Motorola and early-production Nokia phones. The other type is 8-pin chips (such as 24C64, 24C16, etc.). In the 8-pin chip, there are also big eight-foot and small eight-foot points, that is, the distance between the pins has a size. Please pay attention to the maintenance worker when writing the chip with the programmer. These chips are mainly used in mobile phones such as Ericsson and Nokia.


The version in the digital phone logic circuit, also known as the font library (FLASH), is a block memory that loads the basic program of the phone and various function programs in the form of code. With the increasing functions of mobile phones and the shrinking of mobile phones, the software data capacity of fonts has grown from 64Kbit to 32Mbit or even larger. For example, Motorola V998+ mobile phone has a font capacity of more than 32Mbit, from the early 8-bit data exchange to 16-bit data. Switching, from large flat packs to small BGA packages. The increase in capacity is nothing more than the addition of mobile phone features: such as games, computing and language recognition. When the phone is turned on, the microprocessor sends a reset signal RST to the version to reset the system. After the microprocessor reads the read/write terminal of the version and the chip select terminal strobes, the CPU can fetch the instruction from the font library (FLASH), calculate and decode in the microprocessor, and output the coordinated work commands of each part, thereby Complete their respective functions.

Recovering the software data of the mobile phone motherboard font (Flash) program memory is communicated with the microprocessor through the data exchange end and the address exchange end. The CE (CS) terminal is the Flash chip selection terminal, the DE terminal is the read enable terminal, the WE terminal is the write enable terminal, and the RST terminal is the system reset terminal. The four control terminals are respectively controlled by the microprocessor. If the address of Flash is incorrect or not selected, it will cause the phone to not work properly. It usually appears as a failure phenomenon such as not turning on the power, displaying characters, etc., so-called software failure. Since Flash can be erased electrically, it can be rewritten by the programmer when data loss occurs. There is also a hardware failure, that is, the font library (FLASH) module itself is damaged, but this situation does not appear much, if the hardware is faulty, then it is necessary to replace the font module.


Shenzhen Futian District, Yueyue Blueprint Electronic Firm has its own processing factory, is a professional recycling wafer company; want to know more, please consult our online customer service, we will be happy to help you!

客户服务热线

186-2757-1379

137-1365-9665

在线客服