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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
C AC F0 RS1 RS0 OV   P
Bytes 1
Cycles 1
Encoding
00000011
Operation
RR
An = An+1 where n = 0 to 6
A7 = A0
Example
RR A

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