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ST7MC1K2-Auto Datasheet(PDF) 305 Page - STMicroelectronics |
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ST7MC1K2-Auto Datasheet(HTML) 305 Page - STMicroelectronics |
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305 / 371 page ![]() Obsolete Product(s) - Obsolete Product(s) ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto Instruction set 305/371 11.1.2 Immediate Immediate instructions have two bytes: the first byte contains the opcode, the second byte contains the operand value. 11.1.3 Direct In direct instructions, the operands are referenced by their memory address. The direct addressing mode consists of two sub-modes: ● Direct (short) The address is a byte, thus requires only one byte after the opcode, but only allows 00 - FF addressing space. ● Direct (long) The address is a word, thus allowing 64 Kbyte addressing space, but requires 2 bytes after the opcode. 11.1.4 Indexed (no offset, short, long) In this mode, the operand is referenced by its memory address, which is defined by the unsigned addition of an index register (X or Y) with an offset. The indirect addressing mode consists of three sub-modes: ● Indexed (no offset) There is no offset, (no extra byte after the opcode), and allows 00 - FF addressing space. ● Indexed (short) The offset is a byte, thus requires only one byte after the opcode and allows 00 - 1FE addressing space. ● Indexed (long) The offset is a word, thus allowing 64 Kbyte addressing space and requires 2 bytes after the opcode. Table 180. Immediate instructions Immediate instruction Function LD Load CP Compare BCP Bit compare AND, OR, XOR Logical operations ADC, ADD, SUB, SBC Arithmetic operations Obsolete Product(s) - Obsolete Product(s) |
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