Digital Electronics- The 8051 Microcontroller

Digital Electronics- The 8051 Microcontroller
11. A label is used to name a single line of code.
  • TRUE
  • FALSE
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12. Device pins XTAL1 and XTAL2 for the 8051 are used for connections to an external oscillator or crystal.
  • TRUE
  • FALSE
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13. An alternate function of port pin P3.4 in the 8051 is:
  • Timer 0
  • Timer 1
  • interrupt 0
  • interrupt 1
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14. Both registers TL0 and TL1 are needed to start Timer 0.
  • TRUE
  • FALSE
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15. The I/O ports that are used as address and data for external memory are:
  • ports 1 and 2
  • ports 1 and 3
  • ports 0 and 2
  • ports 0 and 3
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16. The last 96 locations in the internal data memory are reserved for general-purpose data storage and stack.
  • TRUE
  • FALSE
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17. Microcontrollers often have:
  • CPUs
  • RAM
  • ROM
  • all of the above
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18. The total external data memory that can be interfaced to the 8051 is:
  • 32K
  • 64K
  • 128K
  • 256K
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19. Which of the following instructions will load the value 35H into the high byte of timer 0?
  • MOV TH0, #35H
  • MOV TH0, 35H
  • MOV T0, #35H
  • MOV T0, 35H
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20. Bit-addressable memory locations are:
  • 10H through 1FH
  • 20H through 2FH
  • 30H through 3FH
  • 40H through 4FH
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Digital Electronics
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