S3F80JB

INSTRUCTION SET

 

 

CCF — Complement Carry Flag

CCF

Operation: C NOT C

The carry flag (C) is complemented. If C = "1", the value of the carry flag is changed to logic zero; if C = "0", the value of the carry flag is changed to logic one.

Flags:

C: Complemented.

 

 

 

 

No other flags are affected.

 

 

Format:

 

 

 

 

 

 

 

 

 

 

Bytes

Cycles

Opcode

 

 

 

 

 

 

(Hex)

 

 

opc

 

1

4

EF

Example:

 

 

 

 

 

 

Given: The carry flag

= "0":

 

 

 

CCF

 

 

 

If the carry flag = "0", the CCF instruction complements it in the FLAGS register (0D5H), changing its value from logic zero to logic one.

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Samsung S3F80JB manual CCF Complement Carry Flag, Ccf, Operation C ← not C, Complemented No other flags are affected