Software protection scenario of NOR FLASH flash memory chip ID application

Each manufacturer's 25 series nor flash memory chips (Winbond, Macronix, gd, etc. will have their own manufacturer ID to indicate, in the product application, you can choose to identify the manufacturer ID or ignore the manufacturer ID. GenerallyRecognize ID to load different drivers
So ID can be used as basic software protection.

1. Vendor ID required:

In fact, when the single-chip microcomputer performs the read and write work on the 25 series chip, it needs to check whether the chip is a manufacturer chip preset by the single chip program (preset by the program developer). If it is detected that the chip ID of the 25 series is not presetIf the manufacturer ID is set, the single-chip microcomputer stops reading and writing, which also causes the situation that we usually say that it cannot be recognized.

2. No need to identify the vendor ID:

The MCU does not need to check the ID of the memory chip when reading and writing, but directly reads the internal storage data. For this kind of customer, all the corresponding memory chips can be used

 Generally speaking, it is best not to bind the chip ID, so that the memory chips of different manufacturers can be directly replaced.However, some product customers will specifically bind memory chips to ensure product stability and anti-counterfeiting requirements.At this time, if the customer needs a new storage 25Qxx to replace, how to solve this?Method 1: Add the new memory manufacturer ID to the MCU software (detailed in the product specification)Method 2: Release the verification link of the memory chip ID when the single-chip microcomputer reads, so that the single-chip microcomputer can directly readMethod 3: Don't change it, or use the original memory chip

In addition, for the newly entered NOR FLASH manufacturers, it is a compatible alternative business.Many ID-restricted scenarios cannot be used, which means losing the market.
If you don't talk about martial arts, the FLASH ID can be edited into the ID of any manufacturer. I wonder if there is such a FLASH manufacturer?Those who know it can leave a comment.