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GMS81C2012 数据表(PDF) 39 Page - Hynix Semiconductor

部件名 GMS81C2012
功能描述  CMOS Single-Chip 8-Bit Microcontroller with A/D Converter & VFD Driver
PDF  92 Pages
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制造商  HYNIX [Hynix Semiconductor]
网页  http://www.skhynix.com/kor/main.do
标志 HYNIX - Hynix Semiconductor

GMS81C2012 数据表(HTML) 39 Page - Hynix Semiconductor

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Hyundai Micro Electronics
GMS81C2020/GMS81C2120
Nov. 1999 Ver 0.0
preliminary
39
11.5 Addressing Mode
The GMS87C1404 and GMS87C1408 uses six addressing
modes;
• Register addressing
• Immediate addressing
• Direct page addressing
• Absolute addressing
• Indexed addressing
• Register-indirect addressing
(1) Register Addressing
Register addressing accesses the A, X, Y, C and PSW.
(2) Immediate Addressing
→
→
→
→ #imm
In this mode, second byte (operand) is accessed as a data
immediately.
Example:
0435
ADC
#35H
E45535
LDM
35H,#55H
(3) Direct Page Addressing
→
→
→
→ dp
In this mode, a address is specified within direct page.
Example;
C535
LDA
35H
;A
←RAM[35H]
(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]
35
A+35H+C
→ A
04
MEMORY
E4
0F100H
data
← 55H
~
~
~
~
data
0035H
þ
35
0F102H
55
0F101H
À
data
35
0035H
0F551H
data
→ A
À
þ
~
~
~
~
C5
0F550H
07
0F100H
~
~
~
~
data
0F035H
þ
F0
0F102H
35
0F101H
À
A+data+C
→ A
address: 0F035



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