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Pull Secured ATMEGA1281 Microcontroller Software out from its flash and eeprom memory, the protected fuse bit of atmega1281 mcu will be reverse engineering, and then copy heximal file to new atmega1281 processor;

The following code example shows how to set port B pins 0 and 1 high, 2 and 3 low, and define the port pins from 4 to 7 as input with pull-ups assigned to port pins 6 and 7. The resulting pin values are read back again, but as pre- viously discussed, a nop instruction is included to be able to read back the value recently assigned to some of the pins.

As shown in Figure 13-2, the digital input signal can be clamped to ground at the input of the Schmitt-trigger. The signal denoted SLEEP in the figure, is set by the MCU Sleep Controller in Power-down mode to crack atmega16 mcu flash memory, Power-save mode, and Standby mode to avoid high power consumption if some input signals are left floating, or have an analog signal level close to VCC/2.

SLEEP is overridden for port pins enabled as External Interrupt pins. If the External Interrupt Request is not enabled by readout secured microcontroller atmega16a program, SLEEP is active also for these pins. SLEEP is also overridden by various other alternate functions as described in “Alternate Port Functions” on page 61.