M34282M1 View Datasheet(PDF) - Renesas Electronics

Part Name

Description

Manufacturer

M34282M1

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

Renesas Electronics 

4282 Group

CMA (CoMplement of Accumulator)

Instrunction D8

D0

code

0 0 0 0 1 1 1 0 02

Operation: (A) ← (A)

Number of Number of Flag CY

words

cycles

0 1 C 16

1

1

–

Skip condition

–

Grouping: Arithmetic operation

Description: Stores the one’s complement for register

A’s contents in register A.

DEY (DEcrement register Y)

Instrunction D8

D0

code

000010111

2

Operation: (Y) ← (Y) – 1

Number of Number of Flag CY

017

words

cycles

16

1

1

–

Skip condition

(Y) = 15

Grouping: RAM addresses

Description: Subtracts 1 from the contents of register Y.

As a result of subtraction, when the con-

tents of register Y is 15, the next instruction

is skipped.

IAE (Input Accumulator from port E)

Instrunction D8

D0

code

001010110

2

Operation: (A2–A0) ← (E2–E0)

Number of Number of Flag CY

056

words

cycles

16

1

1

–

Skip condition

–

Grouping: Input/Output operation

Description: Transfers the contents of port E to register

A.

IAG (Input Accumulator from port G)

Instrunction D8

D0

code

000101000

2

Operation: (A) ← (G)

Number of Number of Flag CY

028

words

cycles

16

1

1

–

Skip condition

–

Grouping: Input/Output operation

Description: Transfers the contents of port G to register

A.

Rev.1.33 Mar 18, 2004 page 30 of 67

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