Holtek HT827A0 Manual page 41

RR [m] Rotate data memory to the right
Description The contents of the specified data memory are rotated 1-bit to the right with
bit 0 rotated to bit 7.
Operation
[m].i ¬ [m].(i+1); [m].i:bit i of the data memory (i=0~6)
[m].7 ¬ [m].0
Affected flag(s)
TC2
¾
RRA [m] Rotate to the right - then place result in the accumulator
Description Data in the specified data memory are rotated 1-bit to the right with bit 0 ro-
tated to bit 7, leaving the rotation result in the accumulator. The contents of
the data memory remain unchanged.
Operation
ACC.(i) ¬ [m].(i+1); [m].i:bit i of the data memory (i=0~6)
ACC.7 ¬ [m].0
Affected flag(s)
TC2
¾
RRC [m] Rotate data memory to the right through carry
Description The contents of the specified data memory and carry flag are rotated 1-bit to
the right. Bit 0 replaces the carry bit; the original carry flag is rotated to the
bit 7 position.
Operation [m].i ¬ [m].(i+1); [m].i:bit i of the data memory (i=0~6)
[m].7 ¬ C
C ¬ [m].0
Affected flag(s)
TC2
¾
TC1 TO PD OV
¾ ¾ ¾ ¾
TC1 TO PD OV
¾ ¾ ¾ ¾
TC1 TO PD OV
¾ ¾ ¾ ¾
41
HT827A0
Z AC C
¾ ¾ ¾
Z AC C
¾ ¾ ¾
Z AC C
¾ ¾ Ö
March 15, 2000