4559 datasheet(110/148 Pages) RENESAS

110 / 148 page

Rev.1.04

Aug 23, 2007

Page 110 of 146

REJ03B0188-0104

4559 Group

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

TAX

(Transfer data to Accumulator from register X)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

101

10 2 05 2 16

Opera-

tion:

(A)

← (X)

Grouping:

Description: Transfers the contents of register X to register A.

TAY

(Transfer data to Accumulator from register Y)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

001

11 2 01 F 16

Opera-

tion:

(A)

← (Y)

Grouping:

Description: Transfers the contents of register Y to register A.

TAZ

(Transfer data to Accumulator from register Z)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

101

11 2 05 3 16

Opera-

tion:

(A1, A0)

← (Z1, Z0)

(A3, A2)

← 0

Grouping:

Description: Transfers the contents of register Z to the low-order 2 bits

(A1, A0) of register A. “0” is stored to the high-order 2 bits

(A3, A2) of register A.

TBA

(Transfer data to register B from Accumulator)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

000

10 2 00 E 16

Opera-

tion:

(B)

← (A)

Grouping:

Description: Transfers the contents of register A to register B.

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