Bit Operation Group Instructions in PIC

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PIC PROGRAMMING INSTRUCTION SETS

DATA TRANSFER GROUP

ARITHMETIC AND LOGIC OPERATIONS GROUP

PROGRAM FLOW CONTROL

Bit Operation Group

1) BCF

BCF is a resetting command instruction used for performing reset operations for a specified bit or specified register (simply called bit clearing flag or bit clearing command). Normally BCF resets the specified bit in f registers content.

• Syntax: Label BCF f, b
• Description: Reset the specified bit of register f
• Operation: Result to f
• Operand: 0 < f < 127 and 0 < b < 7
• No. of words: 1
• No. cycles: 1
• Flags: nil

2 ) BSF

BSF is the inversing operation of BCF. This is also a bitwise operation. The BSF instruction will set the specified bit in the f register (simply called Bit Set Flag or Bit Set command).

• Syntax: Label BSF f, b
• Description: Set the specified bit of register f
• Operation: Result to f
• Operand: 0 < f < 127 and 0 < b < 7
• No. of words: 1
• No. cycles: 1
• Flags: nil