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UPD17062 데이터시트(PDF) 60 Page - Renesas Technology Corp |
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UPD17062 데이터시트(HTML) 60 Page - Renesas Technology Corp |
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60 / 298 page ![]() 58 µPD17062 8.5.2 Functions of Index Register and Data Memory Row Address Pointer When a data memory manipulation instruction is executed with the index enable flag (IXE) set to 1, the index register ORs the data memory bank/address specified by the instruction and the contents of the index register. Then, the index register executes the instruction in the data memory address indicated by the operation result (in other words, the real address). When a general-purpose register indirect transfer instruction (MOV @r, m and MOV m, @r) is executed with the memory pointer enable flag set to 1, the data memory row address pointer executes the instruction, regarding the indirect address bank specified by the general-purpose register and row address as being the value of the data memory row address pointer. Table 8-2 shows the modification of data memory and the indirect address by the index register and data memory row address pointer. All data memories are subject to modification by the index register and data memory row address pointer. The following instructions are not subject to modification by the index register. INC AR INC IX MOVT DBF, @AR PUSH AR POP AR PEEK WR, rf POKE rf, WR GET DBF, P PUT p, DBF BR addr BR @AR RORC r CALL addr CALL @AR RET RETSK RETI EI DI STOP 0 HALT h NOP |
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