HT48R30A datasheet(35/43 Pages) HOLTEK

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RLC [m]

Rotate data memory left through carry

Description

The contents of the specified data memory and the carry flag are rotated 1 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 1 bit left. Bit

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

tion. 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 1 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

HT48R30A-1

Rev. 1.10

July 2, 2001

HT48R30A Scheda tecnica(PDF) 35 Page - Holtek Semiconductor Inc