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However, the maximum value isresulting in carry out. If not set otherwise, then as stated, the default bank is BANK0.

If we plan to use an interrupt, our program will begin after the Interrupt Vector; and if not we can start to write from the beginning of the Reset Vector. While program is being executed, it is working with the particular bank.

When the IRP Equal to 1, the program will 16876 with banks 2, 3. In the fourth line, the number 5 passes to the W register, and in the fifth line, we move the contents of W register which is 5 to the INDF. As a reminder, Program Counter executes commands stored in the program memory, one after the other. The stack space is not part of either program or data space and the stack pointer is not readable or writable.


Pic 16F876

EEDATA will hold this value until another read or until it is written to by the user during a write operation. In contrast, Data Memory does not save the information because it needs power in order to maintain the information stored in the chip.

Then, we are adding the value of and the Xours register together. In the second line, we put a value into the W register. PORTA is a 6-bit wide, bidirectional port. Each one of them has a different role. Usually we define the ports at the beginning of the program, and then we use only the given names. Search this web site: These two memories have separated data buses, which makes the access to each one of them very easy.

The stack operates as a circular buffer. The lower locations of each bank are reserved for the Special Function Registers. cougs

PIC Microcontroller, µC, C18, MCC18, PIC18F45K20, C Code

When we need to access a register that is not located inside BANK0, we are required to switch between the banks. The default bank is BANK0. The following table demonstrates, which of the Banks the program is working with, based on the coure of the RP0 and RP1 bits:.

Part of the registers located inside BANK0, and some are not.

CALL has the address of the first instruction in the subroutine as its pkc. The following table demonstrates, which of the Banks the program is working with, based on the selection of 16f867 RP0 and RP1 bits: Program Counter PC keeps track of the program execution by holding the address of the current instruction. In the second line we put the number 5 into the working register W, and in the line 3, the content of the W passes to the TEMP variable.


PORTC is an 8-bit wide, bidirectional port. Each time we burn program into the micro, we erase an old program and write a new one. Here’s a map of the locations:.

To access a register that is located in another bank, one should access it inside the program. These pins have Schmitt Trigger input buffers.

It is automatically incremented to the next instruction during the current instruction execution. Example of direct addressing: To the left you can see the direct addressing method, where the bank selection is made by RP bits and the referencing is made directly from memory Opcode by using the variable name.