HT827A0 datasheet(41/49 Pages) HOLTEK

41 / 49 page

HT827A0

March 15, 2000

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 TC1

¾¾¾¾¾¾

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 TC1

¾¾¾¾¾¾

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 TC1

¾¾¾¾¾

HT827A0 Datasheet(PDF) 41 Page - Holtek Semiconductor Inc