4556 datasheet(84/145 Pages) RENESAS

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Rev.3.02

Dec 22, 2006

page 84 of 142

REJ03B0025-0302

4556 Group

IAP2 (Input Accumulator from port P2)

1001100010

262

––

Grouping:

Input/Output operation

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

Operation:

(A)

← (P2)

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

11x3

–

Continuous

description

Grouping:

RAM addresses

Description: Loads the value x in the immediate field to

field to register Y. When the LXY instruc-

tions are continuously coded and executed,

only the first LXY instruction is executed

and other LXY instructions coded continu-

ously are skipped.

Operation:

(X)

← x x = 0 to 15

(Y)

← y y = 0 to 15

LXY x, y (Load register X and Y with x and y)

INY (INcrement register Y)

0000010011

–

(Y) = 0

Grouping:

RAM addresses

Description: Adds 1 to the contents of register Y. As a re-

sult of addition, when the contents of

skipped. When the contents of register Y is

not 0, the next instruction is executed.

Operation:

(Y)

← (Y) + 1

LA n (Load n in Accumulator)

000111nnnn

07n

–

Continuous

description

Grouping:

Arithmetic operation

Description: Loads the value n in the immediate field to

When the LA instructions are continuously

coded and executed, only the first LA in-

struction is executed and other LA

instructions coded continuously are

skipped.

Operation:

(A)

← n

n = 0 to 15

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