HT48R30A datasheet(36/43 Pages) HOLTEK

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RRA [m]

Rotate right and place result in the accumulator

Description

Data in the specified data memory is rotated 1 bit right with bit 0 rotated into

bit 7, leaving the rotated 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 right through carry

Description

The contents of the specified data memory and the carry flag are together ro-

tated 1 bit right. Bit 0 replaces the carry bit; the original carry flag is rotated

into 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

RRCA [m]

Rotate right through carry and place result in the accumulator

Description

Data of the specified data memory and the carry flag are rotated 1 bit right.

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

position. The rotated result is stored 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 ¬ C

C ¬ [m].0

Affected flag(s)

TC2 TC1

¾¾¾¾¾

HT48R30A-1

Rev. 1.10

July 2, 2001

HT48R30A Scheda tecnica(PDF) 36 Page - Holtek Semiconductor Inc

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