Microchip MCU PIC18F44K20 Flash Heximal Duplication is a prcess to restore the embedded firmware from microchip processor pic18f44k20 flash and eeprom memory, the fuse bit of mcu pic18f44k20 will be cracked;
The Flash program memory is readable, writable and erasable during normal operation over the entire VDD range.
A read from program memory is executed one byte at a time. A write to program memory is executed on blocks of 64, 32 or 16 bytes at a time, depending on the specific device.
Program memory is erased in blocks of 64 bytes at a time. The difference between the write and erase block sizes requires from 1 to 4 block writes to restore the contents of a single block erase which is possible to also read pic18f14k22 mcu flash program. A bulk erase operation cannot be issued from user code.
Writing or erasing program memory will cease instruction fetches until the operation is complete. The program memory cannot be accessed during the write or erase, therefore, code cannot execute. An internal programming timer terminates program memory writes and erases.
A value written to program memory does not need to be a valid instruction. Executing a program memory location that forms an invalid instruction results in a NOP.
