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S3C72G9 Datasheet(PDF) 71 Page - Samsung semiconductor |
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S3C72G9 Datasheet(HTML) 71 Page - Samsung semiconductor |
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71 / 96 page  % '2%!"+!'2' LDI dst,src Operation: Operand Operation Summary Bytes Cycles A,@HL Load indirect data memory to A; increment register L contents and skip on overflow 1 2 + S Description: The contents of a data memory location are loaded into the accumulator, and the contents of the register L are incremented by one. If an overflow occurs (e.g., if the resulting value in register L is 0H), the next instruction is skipped. The contents of data memory and the carry flag value are unaffected. Operand Binary Code Operation Notation A,@HL 1 0 0 0 1 0 1 0 A ← (HL), then L ← L+1; skip if L = 0H Example: Assume that register pair HL contains the address 2FH and internal RAM location 2FH contains the value 0FH: LD HL,#2FH LDI A,@HL ; A ← (HL) and L ← L+1 JPS XXX ; Skip JPS YYY ; H ← 2H and L ← 0H The instruction 'JPS XXX' is skipped since an overflow occurred after the 'LDI A,@HL' and the instruction 'JPS YYY' is executed. |
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