Clone ATMEGA1284P Secured MCU Heximal from its flash and eeprom memory, the protective system of atmega1284p microcontroller will be reverse engineered, readout embedded firmware from atmega1284p microprocessor flash and eeprom memory;
XTAL1: Chip clock Oscillator pin 1. Used for all chip clock sources except internal calibrated RC Oscillator. When used as a clock pin, the pin can not be used as an I/O pin.
TOSC1: Timer Oscillator pin 1. Used only if internal calibrated RC Oscillator is selected as chip clock source, and the asynchronous timer is enabled by the correct setting in ASSR. When the AS2 bit in ASSR is set (one) to enable asynchronous clocking of Timer/Counter2 by recover mcu atmega64 flash heximal, pin PB6 is disconnected from the port, and becomes the input of the inverting Oscillator amplifier.
In this mode, a crystal Oscillator is connected to this pin, and the pin can not be used as an I/O pin. If PB6 is used as a clock pin, DDB6, PORTB6 and PINB6 will all read 0.
SCK: Master Clock output, Slave Clock input pin for SPI channel. When the SPI is enabled as a Slave, this pin is configured as an input regardless of the setting of DDB5. When the SPI is enabled as a Master in the process of restore atmega64l microcontroller flash software, the data direction of this pin is controlled by DDB5. When the pin is forced by the SPI to be an input, the pull-up can still be controlled by the PORTB5 bit.