8051 INSTRUCTION SET ADDRESSING MODES
ARCHITECTURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following instruction perform the move accumulator to external RAM of 16bit address?
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MOV @ DPTR, A
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MOVX @ Ri, A
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MOV A, @ Ri
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MOVX @ DPTR, A
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Explanation:
Detailed explanation-1: -The MOVX instruction transfers data between the accumulator and external data memory. External memory may be addressed via 16-bits in the DPTR register or via 8-bits in the R0 or R1 registers. When using 8-bit addressing, Port 2 must contain the high-order byte of the address.
Detailed explanation-2: -MOVX-Move Extended Memory. MUL-Multiply Accumulator by B. NOP-No Operation. ORL-Bitwise OR. POP-Pop Value From Stack.
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