MICROPROCESSOR AND MICROCONTROLLER

Detailed explanation-1: -CLRF: Clear file register f Destination: The destination is always the file register f and cannot be changed. Access Bit: Access bank is used if a = 0 . BSR is used to select the bank if a = 1 . Access bit is optional and the default is a = 0 . Description: Clears the contents of file register f .

Detailed explanation-2: -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-3: -The PIC® CPU executes instructions in phases and most chips require four clock cycles to execute one instruction. For example, if you have a 20 MHz crystal this means the CPU executes 5 million instructions per second. The 5 MHz rate is referred to as the instruction clock.

Detailed explanation-4: -BCF-Bit Clear f. BSF-Bit Set f. BTFSC-Bit Test f, Skip if Clear. BTFSS-Bit Test f, Skip if Set. BTG-Bit Toggle f.