Atmel 8051 - Page 48

The 8051 Instruction Set
1-47 Atmel 8051 Microcontrollers Hardware Manual
4316B–8051–02/04
1.14.29 MOV <dest-bit>,<src-bit>
MOV @R
i
,direct
Bytes: 2
Cycles: 2
Encoding: 1010011 i direct addr.
Operation: MOV
((R
i
)) ← (direct)
MOV @R
i
,#data
Bytes: 2
Cycles: 1
Encoding: 0111011 i immediate data
Operation: MOV
((R
i
)) ← #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: 10100010 bit address
Operation: MOV
(C) ← (bit)
MOV bit,C
Bytes: 2
Cycles: 2
Encoding: 10010010 bit address
Operation: MOV
(bit) ← (C)