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The 8051 Instruction Set

Atmel 8051 Microcontrollers Hardware Manual 1-46

4316E–8051–01/07

1.14.29 MOV <dest-

bit>,<src-bit>

MOV @R

,direct

Bytes: 2

Cycles: 2

Encoding: 1 0 1 0 0 1 1 i direct addr.

Operation: MOV

((R

)) ← (direct)

MOV @R

,#data

Bytes: 2

Cycles: 1

Encoding: 0 1 1 1 0 1 1 i immediate data

Operation: MOV

((R

)) ← #data

Function: Move bit data

Description: MOV <dest-bit>,<src-bit> copies the Boolean variable indicated by the second operand into the location

specified by the first operand. One of the operands must be the carry flag; the other may be any directly

addressable bit. No other register or flag is affected.

Example: The carry flag is originally set. The data present at input Port 3 is 11000101B. The data previously written to

output Port 1 is 35H (00110101B).

MOV P1.3,C

MOV C,P3.3

MOV P1.2,C

leaves the carry cleared and changes Port 1 to 39H (00111001B).

MOV C,bit

Bytes: 2

Cycles: 1

Encoding: 1 0 1 0 0 0 1 0 bit address

Operation: MOV

MOV bit,C

Bytes: 2

Cycles: 2

Encoding: 1 0 0 1 0 0 1 0 bit address

Operation: MOV

(bit) ← (C)

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 115 116

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Atmel C51 Handbuch Seite 48