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数据搜索系统，热门电子元器件搜索 |
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PM0044 数据表(PDF) 52 Page - STMicroelectronics |
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PM0044 数据表(HTML) 52 Page - STMicroelectronics |
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52 / 162 page  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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