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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PM0044 датащи(PDF) 42 Page - STMicroelectronics |
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PM0044 датащи(HTML) 42 Page - STMicroelectronics |
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42 / 162 page  STM8 addressing modes PM0044 42/162 Doc ID 13590 Rev 3 6.4.3 SP Indexed addressing mode The offset is a byte, thus require only one byte after the op-code, but only allow 00..(FF + stack top) addressing space. Example: Figure 13. SP Indexed - 8-bit offset - addressing mode example 0086 4B11 PUSH #$11 0087 4B22 PUSH #$22 0088 4B33 PUSH #$33 0089 7B03 LD A,($03,SP) Action: A = ($03, SP) = ($03, $1FFC) = ($1FFF) = $11 Previous Value A Steps to determine effective address PC = 0089 PC = PC + 1 = 008A EA = (PC) + SP=03+1FFC= 1FFF Before completion Instruction Complete A = (EA) = 11 New PC = PC+1 = 008B After completion 1FFF 1FFC SP A 11 SP 1FFC New PC 008B 7B 03 33 22 Adder EA 1FFD 0089 008A 008B 1FFE 1FFF LD A, ($03,SP) VR02059D 1FFC 11 PC 0089 1FFC 03 7B 03 33 22 1FFD 0089 008A 008B 1FFE 1FFF LD A, ($03,SP) 1FFC 11 |
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