4571 datasheet(79/126 Pages) RENESAS

79 / 126 page

Rev.1.02

May 25, 2007

Page 79 of 124

REJ03B0179-0102

4571 Group

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

POF

(Power OFf)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

000

10 2 00 2 16

Opera-

tion:

RAM back-up

Grouping:

Other operation

Description: Puts the system in RAM back-up state by executing the

POF instruction after executing the EPOF instruction.

Note:

If the EPOF instruction is not executed just before this

instruction, this instruction is equivalent to the NOP instruc-

tion.

RAR

(Rotate Accumulator Right)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

001

01 2 01 D 16

0/1

Opera-

tion:

Grouping:

Arithmetic operation

Description: Rotates 1 bit of the contents of register A including the

contents of carry flag CY to the right.

RB j

(Reset Bit)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

100

+j 16

Opera-

tion:

(Mj(DP))

← 0

j = 0 to 3

Grouping:

Bit operation

Description: Clears (0) the contents of bit j (bit specified by the value j in

the immediate field) of M(DP).

RBK

(

Reset BanK flag))

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

100

00 2 04 0 16

Opera-

tion:

← 0 when TABP p instruction is executed.

Grouping:

Other operation

Description: Sets referring data area to pages 0 to 63 when the TABP p

instruction is executed. This instruction is valid only for the

TABP p instruction.

Note:

This instruction cannot be used for the M34571G4/G6.

A3A2A1A0

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