M34282M1 View Datasheet(PDF) - Renesas Electronics

Part Name

Description

Manufacturer

M34282M1

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

Renesas Electronics 

4282 Group

INY (INcrement register Y)

Instrunction D8

D0

code

000010011

2

Operation: (Y) ← (Y) + 1

Number of Number of Flag CY

013

words

cycles

16

1

1

–

Skip condition

(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.

LA n (Load n in Accumulator)

Instrunction D8

D0

code

0 1 0 1 1 n3 n2 n1 n0

2

Operation:

(A) ← n

n = 0 to 15

Number of Number of Flag CY

0 B n 16

words

1

cycles

1

–

Skip condition

Continuous

description

Grouping: Arithmetic operation

Description: Loads the value n in the immediate field to

register A.

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.

LGOP (LoGic OPeration between accumulator and register E)

Instrunction D8

D0

code

001000001

2

Number of

041

16

words

1

Number of

cycles

1

Flag CY

–

Skip condition

–

Operation: Logic operation XOR, OR, AND

Grouping: Arithmetic operation

Description: Executes the logic operation selected by

logic operation selection register LO be-

tween the contents of register A and

register E, and stores the result in register

A.

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

Instrunction D8

D0

code

0 1 1 x1 x0 y3 y2 y1 y0

2

Operation:

(X) ← x, x = 0 to 3

(Y) ← y, y = 0 to 15

Number of Number of Flag CY

0

C

+x

y

16

words

1

cycles

1

–

Skip condition

Continuous

description

Grouping: RAM addresses

Description: Loads the value x in the immediate field to

register X, and the value y in the immediate

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.

Rev.1.33 Mar 18, 2004 page 31 of 67

Share Link: