The 8051 Microcontroller Questions

• This program code will be executed once: STAT: MOV A, #01H JNZ STAT
• The following program will cause the 8051 to be stuck in a loop: LOOP: MOV A, #00H JNZ LOOP
• MOV A, @ R1 will:
• Data transfer from I/O to external data memory can only be done with the MOV command.
• The total amount of external code memory that can be interfaced to the 8051 is:
• The special function registers are maintained in the next 128 locations after the general-purpose data storage and stack.
• When the 8051 is reset and the line is HIGH, the program counter points to the first program instruction in the:
• Both registers TL0 and TL1 are needed to start Timer 0.
• Microcontrollers often have:
• An alternate function of port pin P3.4 in the 8051 is:
• The 8051 has ________ 16-bit counter/timers.
• The total external data memory that can be interfaced to the 8051 is:
• What is the difference between the 8031 and the 8051?
• Which of the following commands will move the value at port 3 to register 2?
• The number of data registers is:
• The following program will receive data from port 1, determine whether bit 2 is high, and then send the number FFH to port 3: READ: MOV A,P1 ANL A,#2H CJNE A,#02H,READ MOV P3,#FFH
• The contents of the accumulator after this operation MOV A,#0BH ANL A,#2CH will be
• The last 96 locations in the internal data memory are reserved for general-purpose data storage and stack.
• The contents of the accumulator after this operation MOV A,#2BH ORL A,00H will be:
• The microcontroller is useful in systems that have nonvariable programs for dedicated applications.