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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST7MC1K2-Auto датащи(PDF) 303 Page - STMicroelectronics |
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ST7MC1K2-Auto датащи(HTML) 303 Page - STMicroelectronics |
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303 / 371 page  Obsolete Product(s) - Obsolete Product(s) ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto Instruction set 303/371 11 Instruction set 11.1 CPU addressing modes The CPU features 17 different addressing modes which can be classified in 7 main groups: The CPU instruction set is designed to minimize the number of bytes required per instruction: To do so, most of the addressing modes may be subdivided in two sub-modes called long and short: ● Long addressing mode is more powerful because it can use the full 64 Kbyte address space, however it uses more bytes and more CPU cycles. ● Short addressing mode is less powerful because it can generally only access page zero (0000h - 00FFh range), but the instruction size is more compact, and faster. All memory to memory instructions use short addressing modes only (CLR, CPL, NEG, BSET, BRES, BTJT, BTJF, INC, DEC, RLC, RRC, SLL, SRL, SRA, SWAP) The ST7 assembler optimizes the use of long and short addressing modes. Table 177. CPU addressing mode groups Addressing mode Example Inherent nop Immediate ld A,#$55 Direct ld A,$55 Indexed ld A,($55,X) Indirect ld A,([$55],X) Relative jrne loop Bit operation bset byte,#5 Table 178. CPU addressing mode overview Mode Syntax Destination Pointer address (Hex.) Pointer size (Hex.) Length (bytes) Inherent nop + 0 Immediate ld A,#$55 + 1 Short Direct ld A,$10 00..FF + 1 Long Direct ld A,$1000 0000..FFFF + 2 No Offset Direct Indexed ld A,(X) 00..FF + 0 Short Direct Indexed ld A,($10,X) 00..1FE + 1 Long Direct Indexed ld A,($1000,X) 0000..FFFF + 2 Short Indirect ld A,[$10] 00..FF 00..FF byte + 2 Long Indirect ld A,[$10.w] 0000..FFFF 00..FF word + 2 Short Indirect Indexed ld A,([$10],X) 00..1FE 00..FF byte + 2 Long Indirect Indexed ld A,([$10.w],X) 0000..FFFF 00..FF word + 2 Relative Direct jrne loop PC+/-127 + 1 Obsolete Product(s) - Obsolete Product(s) |
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