Read Chip PIC16F676 Eeprom content out from the memory, break Microcomputer tamper resistance system and extract the data out from its eeprom memory, the whole process will be a destructive one and conducted in the reverse order of Microcontroller manufacturing;

This interrupt can wake the device from Sleep. The user, in the Interrupt Service Routine, clears the interrupt by:

Any read or write of PORTB. This will end the mismatch condition. Clear the flag bit RABIF. A mismatch condition will continue to set flag bit RABIF. Reading or writing PORTB will end the mismatch condition and allow flag bit RABIF to be cleared when MCU PIC16F877A flash content copying.

The latch holding the last read value is not affected by a MCLR nor Brown-out Reset. After these Resets, the RABIF flag will continue to be set if a mismatch is present if IC PIC16LF873A program copying.

If a change on the I/O pin should occur when the read operation is being executed (start of the Q2 cycle), then the RABIF interrupt flag may not get set. Furthermore, since a read or write on a port affects all bits of that port, care must be taken when using multiple pins in Interrupt-on-Change mode before microcontroller PIC16LF874A heximal reading.

Changes on one pin may not be seen while servicing changes on another pin. Each PORTB pin is multiplexed with other functions. The pins and their combined functions are briefly described here. For specific information about individual functions such as the SSP, I2C™ or interrupts, refer to the appropriate section in this data sheet after chip PIC16LF876A flash reading.

PORTC is a 8-bit wide, bidirectional port. The corresponding data direction register is TRISC (Register 4-10). Setting a TRISC bit (= 1) will make the corresponding PORTC pin an input (i.e., put the corresponding output driver in a High-Impedance mode) .

Clearing a TRISC bit (= 0) will make the corresponding PORTC pin an output (i.e., enable the output driver and put the contents of the output latch on the selected pin). Example 4-4 shows how to initialize PORTC. Reading the PORTC register (Register 4-9) reads the status of the pins, whereas writing to it will write to the PORT latch before microcontroller PIC16F684 firmware copying.

All write operations are read-modify-write operations. Therefore, a write to a port implies that the port pins are read, this value is modified and then written to the PORT data latch.