4501 datasheet(68/116 Pages) RENESAS

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Rev.3.01

2005.02.07

page 68 of 112

REJ03B0104-0301

4501 Group

INY (INcrement register Y)

0000010011

013

–

(Y) = 0

Grouping:

RAM addresses

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

sult 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.

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

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

11x3

–

Continuous

description

Grouping:

RAM addresses

Description: Loads the value x in the immediate field to

field to register Y. When the LXY instructions

are continuously coded and executed, only

the first LXY instruction is executed and

other LXY instructions coded continuously

are skipped.

Operation:

(X)

← x x = 0 to 15

(Y)

← y y = 0 to 15

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

LZ z (Load register Z with z)

00010010z1

–

Grouping:

RAM addresses

Description: Loads the value z in the immediate field to

Operation:

(Z)

← z z = 0 to 3

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