MICROPROCESSOR AND MICROCONTROLLER

Detailed explanation-1: -File register 00 (INDF) is used for indirect file register addressing. The address of the register required is placed in the file select register (FSR). When data is written to or read from INDF, it is actually written to or read from the file register pointed to by FSR.

Detailed explanation-2: -Special purpose registers hold the status of a program. These registers are designated for a special purpose. Some of these registers are stack pointer, program counter etc. General purpose registers hold the temporary data while performing different operations.

Detailed explanation-3: -The main difference is the address space: first 128 Bytes (00H to 7FH) is for regular Internal RAM and next 128 Bytes (80H to FFH) is for SFRs. TIP: As only 21 of the possible 128 SFR memory locations are assigned, it is recommended that the remaining registers or memory locations are not accessed during programming.

Detailed explanation-4: -Data memory is made up of the Special Function Registers (SFR) area, and the General Pur-pose Registers (GPR) area. The SFRs control the operation of the device, while GPRs are the general area for data storage and scratch pad operations. The data memory is banked for both the GPR and SFR areas.