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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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STC89LE53RC 데이터시트(PDF) 37 Page - STCmicro Technology Co,.Ltd |
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STC89LE53RC 데이터시트(HTML) 37 Page - STCmicro Technology Co,.Ltd |
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37 / 165 page  5.3 Instruction Set Summary Mnemonic Description Byte Execution clocks of STC 12T MCU Execution clocks of STC 6T MCU ARITHMETIC OPERATIONS ADD A, Rn Add register to Accumulator 1 12 6 ADD A, direct Add ditect byte to Accumulator 2 12 6 ADD A, @Ri Add indirect RAM to Accumulator 1 12 6 ADD A, #data Add immediate data to Accumulator 2 12 6 ADDC A, Rn Add register to Accumulator with Carry 1 12 6 ADDC A, direct Add direct byte to Accumulator with Carry 2 12 6 ADDC A, @Ri Add indirect RAM to Accumulator with Carry 1 12 6 ADDC A, #data Add immediate data to Acc with Carry 2 12 6 SUBB A, Rn Subtract Register from Acc wih borrow 1 12 6 SUBB A, direct Subtract direct byte from Acc with borrow 2 12 6 SUBB A, @Ri Subtract indirect RAM from ACC with borrow 1 12 6 SUBB A, #data Substract immediate data from ACC with borrow 2 12 6 INC A Increment Accumulator 1 12 6 INC Rn Increment register 1 12 6 INC direct Increment direct byte 2 12 6 INC @Ri Increment direct RAM 1 12 6 DEC A Decrement Accumulator 1 12 6 DEC Rn Decrement Register 1 12 6 DEC direct Decrement direct byte 2 12 6 DEC @Ri Decrement indirect RAM 1 12 6 INC DPTR Increment Data Pointer 1 24 12 MUL AB Multiply A & B 1 48 24 DIV AB Divde A by B 1 48 24 DA A Decimal Adjust Accumulator 1 12 6 The STC MCU instructions are fully compatible with the standard 8051's,which are divided among five functional groups: Arithmetic Logical Data transfer Boolean variable Program branching The following tables provides a quick reference chart showing all the 8051 instructions. Once you are familiar with the instruction set, this chart should prove a handy and quick source of reference. • • • • • All arithmetic instructions execute one machine cycle except the INC DPTR instruction (two machine cycles) and the MUL AB and DIV AB instructions (four machine cycles). Note that a machine cycle contains 12 clocks and takes 1us if MCU is operating in 12T mode and from a 12MHz clock.While MCU is operating in 6T mode, a machine cycle contains 6 clocks. 37 |
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