M34282M2-XXXGP View Datasheet(PDF) - Renesas Electronics

Part Name

Description

Manufacturer

M34282M2-XXXGP

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

Renesas Electronics 

4282 Group

INSTRUCTIONS

The 4282 Group has the 68 instructions. Each instruction is

described as follows;

(1) List of instruction function

(2) Machine instructions (index by alphabet)

(3) Machine instructions (index by function)

(4) Instruction code table

SYMBOL

The symbols shown below are used in the following list of

instruction function and the machine instructions.

Symbol

Contents

Symbol

Contents

A

Register A (4 bits)

D

Port D (8 bits)

B

Register B (4 bits)

E

Port E (3 bits)

DR

Register D (3 bits)

G

Port G (4 bits)

ER

Register E (8 bits)

CARR

Port CARR (1 bit)

V1

Timer control register V1 (3 bits)

CAR

CAR flag (1 bit)

V2

Timer control register V2 (4 bits)

PU0

Pull-down control register PU0 (4 bits)

x

Hexadecimal variable

PU1

Pull-down control register PU1 (4 bits)

y

Hexadecimal variable

LO

Logic operation selection register LO (2 bits)

p

Hexadecimal variable

n

Hexadecimal constant which represents the

X

Register X (2 bits)

immediate value

Y

Register Y (4 bits)

j

Hexadecimal constant which represents the

DP

Data pointer (6 bits)

immediate value

(It consists of registers X and Y)

A3A2A1A0 Binary notation of hexadecimal variable A

PC

Program counter (11 bits)

(same for others)

PCH

High-order 4 bits of program counter

PCL

Low-order 7 bits of program counter

SK

Stack register (11 bits ✕ 4)

←

Direction of data movement

↔

Data exchange between a register and memory

SP

Stack pointer (2 bits)

?

Decision of state shown before “?”

CY

Carry flag

()

Contents of registers and memories

R1

Timer 1 reload register

—

Negate, Flag unchanged after executing

T1

Timer 1

instruction

T1F

Timer 1 underflow flag

M(DP)

RAM address pointed by the data pointer

R2H

Timer 2 reload register

a

Label indicating address a6 a5 a4 a3 a2 a1 a0

R2L

Timer 2 reload register

p, a

Label indicating address a6 a5 a4 a3 a2 a1 a0

T2

Timer 2

in page p3 p2 p1 p0

T2F

Timer 2 underflow flag

C

Hex. number C + Hex. number x (also same for

WDT

Watchdog timer

+

others)

WDF1

Watchdog timer flag 1

x

WDF2

Watchdog timer flag 2

URS

Most significant ROM code reference enable flag

P

Power down flag

STCK

System clock

INSTCK

Instruction clock

Note : The 4282 Group just invalidates the next instruction when a skip is performed. The contents of program counter is not

increased by 2. Accordingly, the number of cycles does not change even if skip is not performed. However, the cycle count

becomes “1” if the TABP p, RT, or RTS instruction is skipped.

Rev.1.33 Mar 18, 2004 page 23 of 67

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