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UPD17708 Datenblatt(PDF) 60 Page - Renesas Technology Corp |
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UPD17708 Datenblatt(HTML) 60 Page - Renesas Technology Corp |
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60 / 358 page ![]() µPD17704, 17705, 17707, 17708, 17709 58 7. ALU (Arithmetic Logic Unit) BLOCK 7.1 Outline of ALU Block Figure 7-1 outlines the ALU block. As shown in the figure, the ALU block consists of an ALU, temporary registers A and B, program status word, decimal adjustment circuit, and memory address control circuit. The ALU operates on, judges, compares, rotates, and transfers 4-bit data in the data memory. Figure 7-1. Outline of ALU Block Data bus Address control Data memory Index modification memory pointer Temporary register A Temporary register B Program status word Carry/borrow/zero detection/decimal/storage specification ALU • Arithmetic operation • Logical operation • Bit judgment • Comparison • Rotation • Transfer Decimal adjustment |
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