We can break ATmel locked chip ATMEGA1281V program, please view the ATmel locked chip ATMEGA1281V features for your reference:
The device is manufactured using Atmel’s high density non-volatile memory technology. The On-chip ISP Flash allows the program memory to be reprogrammed In-System through an SPI serial interface, by a conventional non-volatile memory programmer.
Or by an On-chip Boot program running on the AVR core. The Boot program can use any interface to download the application program in the Application Flash memory.
Software in the Boot Flash section will continue to run while the Application Flash section is updated, providing true Read-While-Write operation before Break ATmel Locked Chip ATmega1281V Program.
By combining an 8-bit RISC CPU with In-System Self-Programmable Flash on a monolithic chip, the Atmel ATMEGA1281V is a powerful microcontroller that provides a highly flexible and cost effective solution to many embedded control applications.
The ATMEGA1281V AVR is supported with a full suite of program and system development tools including: C Compilers, Macro Assemblers, Program Debugger/Simulators, In-Circuit Emulators, and Evaluation kits when Break ATmel Locked Chip ATmega1281V Program.
The ATMEGA1281V differ only in memory sizes, boot loader support, and interrupt vector sizes. Table 2-1 summarizes the different memory and interrupt vector sizes for the devices.
ATMEGA1281V support a real Read-While-Write Self-Programming mechanism. There is a separate Boot Loader Section, and the SPM instruction can only execute from there.
In ATMEGA1281V there is no Read-While-Write support and no separate Boot Loader Section. The SPM instruction can execute from the entire Flash after Break ATmel Locked Chip ATmega1281V Program.
Reliability Qualification results show that the projected data retention failure rate is much less than 1 PPM over 20 years at 85°C or 100 years at 25°C if BREAK IC.

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