1. The 8051 can handle ________ interrupt sources.
2. The special function registers are maintained in the next 128 locations after the general-purpose data storage and stack.
3. This statement will set the address of the bit to 1 (8051 Micro-controller):
SETB 01H
4. MOV A, @ R1 will:
5. A label is used to name a single line of code.
6. 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
7. Device pins XTAL1 and XTAL2 for the 8051 are used for connections to an external oscillator or crystal.
8. When the 8051 is reset and the line is HIGH, the program counter points to the first program instruction in the:
9. An alternate function of port pin P3.4 in the 8051 is:
10. Both registers TL0 and TL1 are needed to start Timer 0.
11. The I/O ports that are used as address and data for external memory are:
12. The last 96 locations in the internal data memory are reserved for general-purpose data storage and stack.
13. Microcontrollers often have:
14. The 8051 has ________ parallel I/O ports.
15. The total external data memory that can be interfaced to the 8051 is:
16. Which of the following instructions will load the value 35H into the high byte of timer 0?
17. Bit-addressable memory locations are:
18. The 8-bit address bus allows access to an address range of:
19. The contents of the accumulator after this operation
MOV A,#0BH
ANL A,#2CH
will be
20. The start-conversion on the ADC0804 is done by using the:
21. This program code will be executed once:
STAT: MOV A, #01H JNZ STAT
22. Which of the following instructions will move the contents of register 3 to the accumulator?
23. Which of the following statements will add the accumulator and register 3?
24. Data transfer from I/O to external data memory can only be done with the MOV command.
25. Which of the following commands will move the number 27H into the accumulator?