Generally speaking, STM32 chip can be read and written. Programming devices such as ST-Link debugger can be used for STM32 chip burning. With these devices, the compiled program can be downloaded to the STM32 chip, and the program of the current chip can also be read to the computer for backup or research.

However, it should be noted that reading the chip of the chip generally needs to unlock the read protection bit of the device. If the STM32 chip has read protection enabled, it needs to be unlocked to read the program or data in the chip. When read protection is enabled and not unlocked, you cannot perform a read operation even with the correct tools. At this time, you need to unlock the read protection, which requires technical support or the help of a professional team.

It should be noted that reading and backing up chips may violate laws and regulations, such as infringing on trade secrets or involving personal privacy. Therefore, before carrying out relevant operations, it is necessary to understand relevant laws and regulations to ensure that the practices are legal and compliant.