Crack AVR Microcontroller ATMEGA64A Flash Memory and duplicate avr mcu atmega64a flash memory firmware to new MCU, the original heximal file can be readount from mcu atmega64a;
If the asynchronous timer is NOT clocked asynchronously, Power-down mode is recommended instead of Power-save mode because the contents of the registers in the asynchronous timer should be considered undefined after wake-up in Power-save mode if AS2 is 0 to unlock atmega64a microcontroller flash program. This sleep mode basically halts all clocks except clkASY, allowing operation only of asynchronous modules, including Timer/Counter 2 if clocked asynchronously.
When the SM2..0 bits are 110 and an external crystal/resonator clock option is selected, the SLEEP instruction makes the MCU enter Standby mode. This mode is identical to Power-down with the exception that the Oscillator is kept running. From Standby mode, the device wakes up in 6 clock cycles.
There are several issues to consider when trying to minimize the power consumption in an AVR controlled system. In general, sleep modes should be used as much as possible, and the sleep mode should be selected so that as few as possible of the device’s functions are operating when attacking atmega64a mcu flash protection. All functions not needed should be disabled. In particular, the following modules may need special consideration when trying to achieve the lowest possible power consumption.