Digital Electronics- The 8051 Microcontroller
Digital Electronics- The 8051 Microcontroller
41. Which of the following commands will copy the contents of location 4H to the accumulator?
- MOV A, 04H
- MOV A, L4
- MOV L4, A
- MOV 04H, A
42. The microcontroller is useful in systems that have nonvariable programs for dedicated applications.
- TRUE
- FALSE
43. The total amount of external code memory that can be interfaced to the 8051 is:
- 32K
- 64K
- 128K
- 256K
46. An alternate function of port pin P3.1 in the 8051 is:
- serial port input
- serial port output
- memory write strobe
- memory read strobe
47. Which of the following instructions will move the contents of the accumulator to register 6?
- MOV 6R, A
- MOV R6, A
- MOV A, 6R
- MOV A, R6
48. The following command will rotate the 8 bits of the accumulator one position to the left:
RL A
RL A
- TRUE
- FALSE
49. An alternate function of port pin P3.0 (RXD) in the 8051 is:
- serial port input
- serial port output
- memory write strobe
- memory read strobe
50. Analog output current must be converted into a usable voltage. To perform this current-to-voltage conversion a 700 op amp may be used.
- TRUE
- FALSE