4559 Datasheet, PDF(92/148 Page) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

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4559 Datasheet, PDF (92/148 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

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4559 Group

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

IAP2 (Input Accumulator from port P2)

Instruc-

tion

code

1 0 0 1 1 0 0 0 1 0 2 2 6 2 16

Number of

words

Number of

cycles

Flag CY

Skip condition

Opera- (A) â (P2)

tion:

Grouping: Input/Output operation

Description: Transfers the input of port P2 to the register A.

IAP3 (Input Accumulator from port P3)

Instruc-

tion

code

1 0 0 1 1 0 0 0 1 1 2 2 6 3 16

Number of

words

Number of

cycles

Flag CY

Skip condition

Opera- (A) â (P3)

tion:

Grouping: Input/Output operation

Description: Transfers the input of port P3 to the register A.

INY (INcrement register Y)

Instruc-

tion

code

0 0 0 0 0 1 0 0 1 1 2 0 1 3 16

Number of

words

Number of

cycles

Flag CY

Skip condition

(Y) = 0

Opera- (Y) â (Y) + 1

tion:

Grouping: RAM addresses

Description: Adds 1 to the contents of register Y. As a result of addition,

when the contents of register Y is 0, the next instruction is

skipped. When the contents of register Y is not 0, the next

instruction is executed.

LA n (Load n in Accumulator)

Instruc-

tion

code

0 0 0 1 1 1 n n n n 2 0 7 n 16

Number of

words

Number of

cycles

Flag CY

Skip condition

Continuous

description

Opera- (A) â n

tion: n = 0 to 15

Grouping: Arithmetic operation

Description: Loads the value n in the immediate field to register A.

When the LA instructions are continuously coded and exe-

cuted, only the first LA instruction is executed and other LA

instructions coded continuously are skipped.

Rev.1.04 Aug 23, 2007 Page 92 of 146

REJ03B0188-0104

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