8051 Instruction Set Manual

RRC

The RRC instruction rotates the eight bits in the accumulator and the one bit in the carry flag right one bit position. Bit 0 of the accumulator is rotated into the carry flag while the original value of the carry flag is rotated in to bit 7 of the accumulator. Bit 7 of the accumulator is rotated into bit 6, bit 6 into bit 5, and so on. No other flags are affected by this instruction.

See Also: RL, RLC, RR

RRC
An = An+1 where n = 0 to 6
A7 = C
C = A0

RRC A