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PM0044 Arkusz danych(PDF) 40 Page - STMicroelectronics

Numer części PM0044
Szczegółowy opis  STM8 CPU programming manual
PDF  162 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM0044 Arkusz danych(HTML) 40 Page - STMicroelectronics

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STM8 addressing modes
PM0044
40/162
Doc ID 13590 Rev 3
6.4.1
No Offset Indexed addressing mode
There is no offset, (no extra byte after the op-code), but only allows 00..FF addressing
space.
Example:
Figure 11.
No Offset Indexed addressing mode example
00B8
11223344
table
dc.w $1122, $3344
05F2
AEB8
LD
X,#table
05F4
F6
LD
A,(X)
Action:
X = table
A = (X) = (table) = ($B8) = $11
Previous Value
B8
A
X
Steps to determine
Effective Address
PC = 05F4
EA = X + 0000 = 00B8
Before completion
Instruction Complete
A = (EA) = 11
New PC = PC +1 = 05F5
After completion
00B8
F6
05F4
EA
PC
11
A
11
X
B8
New PC
05F5
LD A,(X)
Table .word 1122
00B8
05F4
05F4
05F5
00B8
VR02059C
44
33
22
F6
11
44
33
22
Table .word 1122
LD A,(X)
00B9
00BA
00BB



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