Q. The instruction, ADD A, R7 is an example of

View solution

Q. The instruction, ADD A, #100 performs

View solution

Q. In which of these addressing modes, a constant is specified in the instruction, after the opcode byte?

View solution

Q. The only memory which can be accessed using indexed addressing mode is

View solution

Q. The data address of look-up table is found by adding the contents of

View solution

Q. Which of the following is not an instruction of 8051 instructions?

View solution

Q. The logical instruction that affects the carry flag during its execution is

View solution

Q. In logical instructions, the immediate data can be an operand for

View solution

Q. If the most significant bit of relative address byte is 1, then the short jump instruction is

View solution

Q. The first byte of an absolute jump instruction consists of

View solution

Q. The third byte of the long jump instruction is

View solution

Q. The absolute jump instruction is intended mainly for a jump within a memory space of

View solution

Q. The LJMP instruction is very useful in programming in the external code memory space of

View solution

Q. Which of the following is not an unconditional control transfer instruction?

View solution

Q. The conditional control transfer instructions use

View solution

Q. Which of the following is not a conditional control transfer instruction?

View solution

Q. The mnemonic used to perform a subtraction of source with an 8-bit data and jumps to specified relative address if subtraction is non-zero is

View solution

Q. The mnemonic, JNB is used to jump to the specified relative address only if

View solution

Q. The type of operand that is not allowed to use in boolean instructions of 8051 is

View solution

Q. In boolean instructions, the flag that is the only allowed destination operand for two operand instructions is

View solution