How to crack At89 at90 at91 chip?

Atmel chip decryption is the process of extracting key information from a microcontroller chip and obtaining the chip’s internal program decryption through various technical means, utilizing vulnerabilities or software defects in the design of the microcontroller chip through dedicated or self-made devices.
Atmel has three series of microcontrollers: AT89, AT90, and AT91.
The vast majority of 51 core microcontrollers on the market now come from Atmel. After obtaining the 51 core, Atmel developed the AT89S series microcontroller with embedded Flash memory, which is a standard 51 core and has gained a large market share in China through its low cost and good market promotion. Atmel also has a reduced instruction set AVR series microcontroller, which is currently the fastest 8-bit microcontroller. The Atmel chip crack was dedicated to research by the reverse engineering technology research team SZOROD, which was initially established in China at that time, and has already laid a solid foundation in technology.
ATMEGA(XX); AT91SAM7L(XX); AT91SAM7S(XX);
AT91SAM7SE(XX); AT91SAM7X(XX); AT91SAM7XC(XX);
ATTINY（XX）, AT89C(XX); AT89S(XX); AT89LV(XX);
AT89LP(XX); AT90CAN(XX); AT90USB(XX); AT90S(XX);
ATF16V8(XX); ATF20V8(XX); ATF22V10(XX);
ATF(XX);