MC80F0208K View Datasheet(PDF) - MagnaChip Semiconductor

Part Name

Description

MFG CO.

MC80F0208K

8-BIT SINGLE-CHIP MICROCONTROLLERS WITH 10-BIT A/D CONVERTER AND UART

MagnaChip Semiconductor 

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MC80F0208/16/24

Preliminary

D500FA LDA !0FA00H+Y

35H

data

~~

DB

➋

~~

data → A

➊ 36H → X

X indexed direct page (8 bit offset) → dp+X

This address value is the second byte (Operand) of command plus

the data of X-register. And it assigns the memory in Direct page.

ADC, AND, CMP, EOR, LDA, LDY, OR, SBC, STA STY,

XMA, ASL, DEC, INC, LSR, ROL, ROR

Example; G=0, X=0F5H

C645 LDA 45H+X

3AH

data

~~

0E550H

C6

0E551H

45

➌

~~

➋ data → A

➊

45H+0F5H=13AH

Y indexed direct page (8 bit offset) → dp+Y

This address value is the second byte (Operand) of command plus

the data of Y-register, which assigns Memory in Direct page.

This is same with above (2). Use Y register instead of X.

Y indexed absolute → !abs+Y

Sets the value of 16-bit absolute address plus Y-register data as

Memory.This addressing mode can specify memory in whole ar-

ea.

Example; Y=55H

0F100H

D5

0F101H

00

0F102H

FA

~~

0FA55H

data

➊

0FA00H+55H=0FA55H

~~

➋

data → A

➌

8.4.6 Indirect Addressing

Direct page indirect → [dp]

Assigns data address to use for accomplishing command which

sets memory data (or pair memory) by Operand.

Also index can be used with Index register X,Y.

JMP, CALL

Example; G=0

3F35 JMP [35H]

35H

36H

~~

0E30AH

~~

0FA00H

0A

E3

NEXT

3F

35

~~ ➋

➊

jump to

address 0E30AH

~~

X indexed indirect → [dp+X]

Processes memory data as Data, assigned by 16-bit pair memory

which is determined by pair data [dp+X+1][dp+X] Operand plus

X-register data in Direct page.

ADC, AND, CMP, EOR, LDA, OR, SBC, STA

Example; G=0, X=10H

34

MAR. 2005 Ver 0.2

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