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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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COP8SE 데이터시트(PDF) 38 Page - National Semiconductor (TI) |
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COP8SE 데이터시트(HTML) 38 Page - National Semiconductor (TI) |
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38 / 47 page  12.0 Instruction Set (Continued) 12.4.9 No-Operation Instruction The no-operation instruction does nothing, except to occupy space in the program memory and time in execution. No-Operation (NOP) Note: The VIS is a special case of the Indirect Transfer of Control addressing mode, where the double byte vector associated with the interrupt is transferred from adjacent addresses in the program memory into the program counter (PC) in order to jump to the associated interrupt ser- vice routine. 12.5 REGISTER AND SYMBOL DEFINITION The following abbreviations represent the nomenclature used in the instruction description and the COP8 cross-assembler. Registers A 8-Bit Accumulator Register B 8-Bit Address Register X 8-Bit Address Register SP 8-Bit Stack Pointer Register PC 15-Bit Program Counter Register PU Upper 7 Bits of PC PL Lower 8 Bits of PC Registers C 1 Bit of PSW Register for Carry HC 1 Bit of PSW Register for Half Carry GIE 1 Bit of PSW Register for Global Interrupt Enable VU Interrupt Vector Upper Byte VL Interrupt Vector Lower Byte Symbols [B] Memory Indirectly Addressed by B Register [X] Memory Indirectly Addressed by X Register MD Direct Addressed Memory Mem Direct Addressed Memory or [B] Meml Direct Addressed Memory or [B] or Immediate Data Imm 8-Bit Immediate Data Reg Register Memory: Addresses F0 to FF (Includes B, X and SP) Bit Bit Number (0 to 7) ← Loaded with ↔ Exchanged with 12.6 INSTRUCTION SET SUMMARY ADD A,Meml ADD A←A + Meml ADC A,Meml ADD with Carry A←A+Meml+C,C←Carry, HC←Half Carry SUBC A,Meml Subtract with Carry A←A−MemI+C,C←Carry, HC←Half Carry AND A,Meml Logical AND A←A and Meml ANDSZ A,Imm Logical AND Immed., Skip if Zero Skip next if (A and Imm) = 0 OR A,Meml Logical OR A←A or Meml XOR A,Meml Logical EXclusive OR A←A xor Meml IFEQ MD,Imm IF EQual Compare MD and Imm, Do next if MD = Imm IFEQ A,Meml IF EQual Compare A and Meml, Do next if A = Meml IFNE A,Meml IF Not Equal Compare A and Meml, Do next if A ≠ Meml IFGT A,Meml IF Greater Than Compare A and Meml, Do next if A > Meml IFBNE # If B Not Equal Do next if lower 4 bits of B ≠ Imm DRSZ Reg Decrement Reg., Skip if Zero Reg←Reg − 1, Skip if Reg = 0 SBIT #,Mem Set BIT 1 to bit, Mem (bit = 0 to 7 immediate) RBIT #,Mem Reset BIT 0 to bit, Mem IFBIT #,Mem IF BIT If bit #, A or Mem is true do next instruction RPND Reset PeNDing Flag Reset Software Interrupt Pending Flag X A,Mem EXchange A with Memory A ↔Mem X A,[X] EXchange A with Memory [X] A ↔[X] LD A,Meml LoaD A with Memory A←Meml LD A,[X] LoaD A with Memory [X] A←[X] LD B,Imm LoaD B with Immed. B←Imm LD Mem,Imm LoaD Memory Immed. Mem←Imm LD Reg,Imm LoaD Register Memory Immed. Reg←Imm XA, [B ±] EXchange A with Memory [B] A ↔[B], (B←B ±1) XA, [X ±] EXchange A with Memory [X] A ↔[X], (X←X ±1) www.national.com 38 |
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