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 is wrong
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INC DPTR
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MOV @DPTR, A
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MOV A, @A+DPTR
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DEC DPTR
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Explanation:
Detailed explanation-1: -1 Answer. DPTR – Data pointer is the 8051’s only user-accessible 16 bit (2-byte) register. DPTR is meant for pointing to data.
Detailed explanation-2: -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.
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