MC80F0424 Datasheet, PDF (42/135 Pages) List of Unclassifed Manufacturers – 8-BIT SINGLE-CHIP MICROCONTROLLERS

MC80F0424/0432/0448
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 -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=0F5_H
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=55_H
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=10_H
38
MAR. 2005 Ver 0.2