4559 datasheet(96/148 Pages) RENESAS

96 / 148 page

Rev.1.04

Aug 23, 2007

Page 96 of 146

REJ03B0188-0104

4559 Group

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

(Reset Carry flag)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

000

10 2 00 6 16

110

Opera-

tion:

(CY)

← 0

Grouping:

Arithmetic operation

Description: Clears (0) to carry flag CY.

RCP

(Reset Port C)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

000

00 2 28 C 16

Opera-

tion:

(C)

← 0

Grouping:

Input/Output operation

Description: Clears (0) to port C.

(Reset port D specified by register Y)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

001

00 2 01 4 16

Opera-

tion:

(D(Y))

← 0

(Y) = 0 to 7

Grouping:

Input/Output operation

Description: Clears (0) to a bit of port D specified by register Y.

Note:

(Y) = 0 to 7.

Do not execute this instruction if values except above are

set to register Y.

(ReTurn from subroutine)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

100

00 2 04 4 16

Opera-

tion:

(PC)

← (SK(SP))

(SP)

← (SP) −1

Grouping:

Return operation

Description: Returns from subroutine to the routine called the subrou-

tine.

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