Microcontroller Cracking Without Part Number

With MCU design and manufacturing technology continues to evolve, Microcontroller cracking method is also emerging, alteration on Microcontroller’s package, erase silkscreen and burn out pins of Microcontroller as well as other methods being applied on electronic devices at home and abroad, erase silkscreen on Microcontroller is the most common method.

Microcontroller Cracking Without Part Number

For such kind of Microcontroller cracking, must first get to know the exact model number of the Microcontroller, a majority of companies use observation method like assessing the external circuit to estimate the probable models of Microcontroller, due to continuous development of the industry, the limitations of this approach has been growing, mainly in the following several reasons:

1. Because Microcontroller from same company often has compatible pins (for example: MCU from PIC series and MCU of AVR series), so even determine which series of this Microcontroller generously, but still difficult to determine its concrete model;

2. Today, different companies have compatible pins of Microcontroller is also very common (such as EMC78P156 and IC16C54C, etc.), which added more difficult for us to determine the final model number of Microcontroller;

3. Because different companies have different Microcontroller programming port and verified pins distribution, especially the distribution of high-voltage VPP pin is different, so before the Microcontroller model has not been determined, random use of programmer to read the its program (which is currently the most popular approach), it is very likely to cause damage of inside content of flash and eeprom memory.

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