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PM0044 Datasheet(PDF) 37 Page - STMicroelectronics |
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PM0044 Datasheet(HTML) 37 Page - STMicroelectronics |
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37 / 162 page  PM0044 STM8 addressing modes Doc ID 13590 Rev 3 37/162 6.3.2 Long Direct addressing mode The address is a word, thus allowing 0000 to FFFF addressing space, but requires 2 bytes after the op-code. Example: 0409 C606E5 LD A,coeff 06E5 40 coeff dc.b $ 40 Action: A = (coeff) = ($06E5) = $40 Figure 9. Long Direct addressing mode example Previous Value 0409 A PC E5 Steps to Determine Effective Address PC = 0409 PC = PC + 1 = 040A EA = (PC) : (PC+1) = 06E5 PC + 2 = Before Completion 40 040C A New PC Instruction Complete A = (EA) = 40 New PC = 040C After Completion C6 06E5 EA 06 40 06E5 E5 C6 06 40 040A 040B 040C 040A 040B 040C 0409 0409 06E5 06E5 VR02059B LD A,Coeff LD A,Coeff Coeff .byte 040h Coeff .byte 040h |
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