PM0044 datasheet(69/162 Pages) STMICROELECTRONICS

69 / 162 page

PM0044

STM8 instruction set

Doc ID 13590 Rev 3

69/162

LDF

Data load /

store

with extended

address

LDF A,($123456,X)

← M(X+extoff)

AF ee ww

LDF A,($123456,Y)

← M(Y+extoff)

90 AF ee ww

LDF A,([$1234.e],X)

← M(X+[longptr.e])

92 AF ww bb

LDF ($123456,X),A

M(X+extoff)

← A

A7 ee ww

LDF ($123456,Y),A

M(Y+extoff)

← A

90 A7 ee ww

LDF ([1234.e],X),A

M(X+[longptr.e])

← A

92 A7 ww bb

LDW

X register load

LDW X,($12,SP)

← M(SP+shortoff)

1E bb

X register store

LDW ($12,SP),X

M(SP+shortoff)

← X1F bb

Y register load

LDW Y,($12,SP)

← M(SP+shortoff)

16 bb

Y register store

LDW ($12,SP),Y

M(SP+shortoff)

← Y

17 bb

SP register load

/ store

LDW SP,X

← X94

LDW X,SP

← SP

Index register

move

LDW X, Y

← Y93

MOV

Data byte move

MOV $1234,#$12

M(longmem)

← imm.b

35 ii ww bb

MOV $12,$34

MOV mem1,mem2

M(mem1.b)

←

M(mem2.b)

44 b2 b1

MOV $1234,$5678

MOV mem1,mem2

M(mem1.w)

←

M(mem2.w)

45 w2 b2 w1

MUL

8 by 8

multiplication

(unsigned)

MUL X,A

← X*A

MUL Y,A

← Y*A

90 42

NEG

Logical 2’s

complement

NEG ([$1234.w],X)

M(M(longmem) + X)

←

00 - M(M(longmem) + X)

72 60 ww bb

NEGW

Logical 2’s

complement

NEGW X

← 0000 - X

NOP

No operation

NOP

---------

Logical OR

OR A,($12,SP)

← A OR M(SP+shortoff) 1A bb

POP

Pop data byte

from stack

POP $1234

M(longmem)

← M(++SP)

32 ww bb

Pop

code condition

POP CC

← M(++SP)

Table 42.

Instruction set summary (continued)

Description

Effect on CC register

Syntax example

Operation

Example

op-

code(s)

VI1

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