HT49C10 datasheet(39/47 Pages) HOLTEK

39 / 47 page

RLC [m]

Rotate data memory left through carry

Description

The contents of the specified data memory and the carry flag are rotated one

bit left. Bit 7 replaces the carry bit; the original carry flag is rotated into the

bit 0 position.

Operation

[m].(i+1) ¬ [m].i; [m].i:bit i of the data memory (i=0~6)

[m].0 ¬ C

C ¬ [m].7

Affected flag(s)

TC2 TC1

¾¾¾¾¾

RLCA [m]

Rotate left through carry and place result in the accumulator

Description

Data in the specified data memory and the carry flag are rotated one bit left.

Bit 7 replaces the carry bit and the original carry flag is rotated into bit 0 po-

sition. The rotated result is stored in the accumulator but the contents of the

data memory remain unchanged.

Operation

ACC.(i+1) ¬ [m].i; [m].i:bit i of the data memory (i=0~6)

ACC.0 ¬ C

C ¬ [m].7

Affected flag(s)

TC2 TC1

¾¾¾¾¾

RR [m]

Rotate data memory right

Description

The contents of the specified data memory are rotated one bit 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

HT49C10

September 28, 1999

HT49C10 Datasheet(PDF) 39 Page - Holtek Semiconductor Inc