7. The second byte of an instruction in the immediate addressing mode is A a lab

Question

7. The second byte of an instruction in the immediate addressing mode is A a label B an opcode C an address value D. a data value 8. The addressing mode for the instruction ADD A, R7 is the A register addressing mode B indexed addressing mode C. relative addressing mode D. immediate addressing mode 9. Which addressing mode is used for pushing information onto the stack? A Register addressing mode B Indexed addressing mode C. Relative addressing mode D. Direct addressing mode 10. What is the final result in the accumulator after the execution of the following program segment? MOVA #13H ADD A #17H ADD A #10H A. 1BH B. 40H C. 3AH D. 28H 11. A microcontroller's program counter is typically as wide as the A data bus B. control bus C address bus D largest bus width 12. Which of the following instructions is used to access data elements of lookup table entries locat the program ROM space of the 8051? A MOV @RO, A B. MOV @A QR1 C. MOVA @A+DPTR D. MOVC A A DPTR

Explanation / Answer

7) The second byte of an instruction in the immediate addressing mode is a data value .

8) The addressing mode for the instruction ADD A,R7 is Register Addressing Mode.

9) Direct Addressing Mode is used for pushing information into the stack.

10) 40 H is the result . (13H+17H+10H).

11) A microcontrollers program counter is typically as wide as address bus.

12) MOV A, @A+DPTR instruction .

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