MICROPROCESSOR AND MICROCONTROLLER

Detailed explanation-1: -MOVWF instruction is used to move the data (bits) from W register to flag register F (copy/move the value from W register to F register).

Detailed explanation-2: -Bits RP1 and RP0 (Register Page 1 and Register Page 0 respectively) serve as the upper 2 address bits for instructions which directly address the iRAM locations. This makes bit RP1 a 0 while making bit RP0 a 1, which gives us the leading “01” in TRISA’s address.

Detailed explanation-3: -File register is RAM portion of PIC18F microcontrollers and used by programmers as data pad or scratch pad. File Register is divided into two different portions . SFR and GPR. SFR is used for dedicated function only while GPR is used for general purpose data or any data.

Detailed explanation-4: -A register is a place inside the PIC that can be written to, read from or both. Think of a register as a piece of paper where you can look at and write information on. The figure below shows the register file map inside the PIC16F84.