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PM0044 Arkusz danych(PDF) 52 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) 52 Page - STMicroelectronics

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STM8 addressing modes
PM0044
52/162
Doc ID 13590 Rev 3
Figure 19.
Long Pointer Indirect Long Indexed addressing mode example
Steps to determine
Effective Address
PC = 1692
PC = PC + 2 = 1694
EA = (((PC) : (PC+1)) :
Before completion
Instruction Complete
A = (EA) = 40
New PC = PC + 2 = 1696
After completion
18
00
72
D6
89
10
20
30
40
PC
1692
X
03
A
Previous value
Adder
EA
1803
ptr .word table
18
00
92
D6
10
10
20
30
40
ptr .word table
X
03
New PC
1696
A
40
1800
03
table .byte 0x10,0x20,0x30,
table .byte 0x10,0x20,0x30,
1089
108A
1692
1693
1694
1800
1801
1802
1803
1089
108A
1692
1693
1694
1800
1801
1802
1803
1695
LD A,([longptr.w],X)
1695
10
89
1696
EA = 1803
((PC) : (PC+1) +1)) + X
LD A,([longptr.w],X)
0x
40
0x
40



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