6.33.1 Description

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

Operation:

(i)

I/O(A,b) ← 0

Syntax:

Operands:

Program Counter:

(i)

CBI A,b

0 ≤ A ≤ 31, 0 ≤ b ≤ 7

PC ← PC + 1

16-bit Opcode:

10011000AAAAAbbb