Copy MCU PIC16F877A Flash program and eeprom data and reprogramme the firmware to blank Microcontroller PIC16F877A which will provide the same functions as original version after reverse engineering microcontroller;

A computed GOTO is accomplished by adding an offset to the program counter (ADDWF PCL). When doing a table read using a computed GOTO method, care should be exercised if the table location crosses a PCL memory boundary (each 256 byte block).

Refer to the Application Note, “Implementing a Table Read” (AN556). The PIC16F7X family has an 8-level deep x 13-bit wide SUB1_P1 hardware stack if extract ic pic12f509 hex.

The stack space is not part of either program or data space and the stack pointer is not readable or writable. The PC is PUSHed onto the stack when a CALL instruction is executed, or an interrupt causes a branch.

The stack is POPed in the event of a RETURN, RETLW or a RETFIE instruction execution. PCLATH is not affected by a PUSH or POP operation after read mcu pic16f506 flash.

The stack operates as a circular buffer. This means that after the stack has been PUSHed eight times, the ninth push overwrites the value that was stored from the first push. The tenth push overwrites the second push (and so on).

The INDF register is not a physical register. Addressing the INDF register will cause indirect addressing. Indirect addressing is possible by using the INDF register.

Any instruction using the INDF register actually accesses the register pointed to by the File Select Register, FSR. Reading the INDF register itself indirectly (FSR = ’0’) will read 00h.

Writing to the INDF register indirectly results in a no operation (although status bits may be affected). An effective 9-bit address is obtained by concatenating the 8-bit FSR register and the IRP bit (STATUS<7>). A simple program to clear RAM locations 20h-2Fh using indirect addressing is shown in Example 2-2.