8051 Instruction Set Manual

RR

The RR instruction rotates the eight bits in the accumulator right one bit position. Bit 0 of the accumulator is rotated into bit 7, bit 7 into bit 6, and so on. No flags are affected by this instruction.

See Also: RL, RLC, RRC

RR A
CACF0RS1RS0OV P
Bytes1
Cycles1
Encoding
00000011
Operation
RR
An = An+1 where n = 0 to 6
A7 = A0
Example
RR A