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COP8CCR9IMT7/NOPB Datasheet(PDF) 91 Page - Texas Instruments |
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COP8CCR9IMT7/NOPB Datasheet(HTML) 91 Page - Texas Instruments |
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91 / 111 page  COP8CBR9, COP8CCR9, COP8CDR9 www.ti.com SNOS535I – OCTOBER 2000 – REVISED MARCH 2013 The available addressing modes are: • Direct • Register B or X Indirect • Register B or X Indirect with Post-Incrementing/Decrementing • Immediate • Immediate Short • Indirect from Program Memory The addressing modes are described below. Each description includes an example of an assembly language instruction using the described addressing mode. Direct. The memory address is specified directly as a byte in the instruction. In assembly language, the direct address is written as a numerical value (or a label that has been defined elsewhere in the program as a numerical value). Example: Load Accumulator Memory Direct LD A,05 Reg/Data Contents Contents Memory Before After Accumulator XX Hex A6 Hex Memory Location A6 Hex A6 Hex 0005 Hex Register B or X Indirect. The memory address is specified by the contents of the B Register or X register (pointer register). In assembly language, the notation [B] or [X] specifies which register serves as the pointer. Example: Exchange Memory with Accumulator, B Indirect X A,[B] Reg/Data Contents Contents Memory Before After Accumulator 01 Hex 87 Hex Memory Location 87 Hex 01 Hex 0005 Hex B Pointer 05 Hex 05 Hex Register B or X Indirect with Post-Incrementing/Decrementing. The relevant memory address is specified by the contents of the B Register or X register (pointer register). The pointer register is automatically incremented or decremented after execution, allowing easy manipulation of memory blocks with software loops. In assembly language, the notation [B+], [B −], [X+], or [X−] specifies which register serves as the pointer, and whether the pointer is to be incremented or decremented. Example: Exchange Memory with Accumulator, B Indirect with Post-Increment X A,[B+] Reg/Data Contents Contents Memory Before After Accumulator 03 Hex 62 Hex Copyright © 2000–2013, Texas Instruments Incorporated Functional Description 91 Submit Documentation Feedback Product Folder Links: COP8CBR9 COP8CCR9 COP8CDR9 |
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