Samsung S3F80JB User Manual

Page 155

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S3F80JB

INSTRUCTION SET

6-27

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.