Operations:

Syntax:

Operation:

Operands:

Program Counter:

Opcode

Comment

Stack

CBI A,b

I/O(A,b) = 0

0 <= A <= 31, 0 <= b <= 7

PC = PC + 1

10011000AAAAAbbb

Description

Clears a specified bit in an I/O Register. This instruction operates on the lower 32 I/O Registers - addresses 0-31.

Status Register (SREG) and Boolean Formula

I

–

T

–

H

–

S

–

V

–

N

–

Z

–

C

–

Example: 

      cbi   0x12,7  ; Clear bit 7 at address 0x12

Words

1 (2 bytes)

Table Cycles

Name

Cycles

AVRe

2

AVRxm

1

AVRxt

1

AVRrc

1