MICROPROCESSOR AND MICROCONTROLLER

Detailed explanation-1: -RAM(Random Access Memory) File Registers The PIC16F84A has two banks. This memory is divided into two sections. The first 12 bytes (00h-0Bh) of each bank are called SFR (Special Function Registers) and are used to record the operating states of the PIC, the input/output (I/O) port conditions and other conditions.

Detailed explanation-2: -PIC18F Microcontroller Series The memory in general consists of 16 banks, each of 256 bytes. PIC18F452 has 1536 bytes of data memory (6 banks × 256 bytes each) occupying the lower end of the data memory.

Detailed explanation-3: -The 16F84 has a total of 68 general purpose registers. They are all in Bank0. However, if you have selected Bank1 and try to access one of these registers you will get the same result as if you had selected Bank0 before accessing the register.

Detailed explanation-4: -As a result, the PIC18 designers divided the 4096 file registers into 16 banks. Only one bank of 256 file registers is active at any time.