參數(shù)資料
型號: GMS81508B
廠商: Hynix Semiconductor Inc.
元件分類: 8位微控制器
英文描述: 8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 8位單晶片微控制器
文件頁數(shù): 34/110頁
文件大小: 1980K
代理商: GMS81508B
GMS81508B/16B/24B, GMS82512/16/24
MAY. 2001 Ver 2.0
31
(4) Absolute Addressing
!abs
Absolute addressing sets corresponding memory data to
Data, i.e. second byte (Operand I) of command becomes
lower level address and third byte (Operand II) becomes
upper level address.
With 3 bytes command, it is possible to access to whole
memory area.
ADC, AND, CMP, CMPX, CMPY, EOR, LDA, LDX,
LDY, OR, SBC, STA, STX, STY
Example;
0735F0
ADC
!0F035H
;A
ROM[0F035H]
The operation within data memory (RAM)
ASL, BIT, DEC, INC, LSR, ROL, ROR
Example; Addressing accesses the address 0135
H
regard-
less of G-flag.
983501
INC
!0135H
;A
ROM[135H]
(5) Indexed Addressing
X indexed direct page (no offset)
{X}
In this mode, a address is specified by the X register.
ADC, AND, CMP, EOR, LDA, OR, SBC, STA, XMA
Example; X=15
H
, G=1
D4
LDA
{X}
;ACC
RAM[X].
X indexed direct page, auto increment
{X}+
In this mode, a address is specified within direct page by
the X register and the content of X is increased by 1.
LDA, STA
Example; G=0, X=35
H
DB
LDA
{X}+
X indexed direct page (8 bit offset)
dp+X
This address value is the second byte (Operand) of com-
mand plus the data of -register. And it assigns the mem-
ory 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
07
35
0F100H
~
~
data
0F035H
t
F0
0F102H
0F101H
à
A+data+C
A
address: 0F035
98
35
0F100H
~
~
data
135H
t
address: 0135
01
0F102H
0F101H
à
data+1
data
data
D4
115H
0E550H
data
A
à
t
~
~
data
DB
35H
data A
36H X
à
t
~
~
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