Digital Electronics-Microprocessor Fundamentals
Digital Electronics-Microprocessor Fundamentals
12. What type of circuit is used at the interface point of an output port?
- decoder
- latch
- tristate buffer
- none of the above
13. I/O mapped systems identify their input/output devices by giving them a(n) ________.
- 8-bit port number
- 16-bit port number
- 8-bit buffer number
- 8-bit instruction
14. What type of circuit is used at the interface point of an input port?
- decoder
- latch
- tristate buffer
- none of the above
15. The register in the 8085A that is used to keep track of the memory address of the next op-code to be run in the program is the:
- stack pointer
- program counter
- instruction pointer
- accumulator
16. The control bus and memories share a bidirectional bus in a typical microprocessor system.
- TRUE
- FALSE
17. The control bus and memories share a bidirectional bus in a typical microprocessor system.
- TRUE
- FALSE
18. All computer programs for a machine are called:
- software
- firmware
- hardware
- none of the above
19. The 8085A is a(n):
- 16-bit parallel CPU
- 8-bit serial CPU
- 8-bit parallel CPU
- none of the above
20. Because microprocessor CPUs do not understand mnemonics as they are, they have to be converted to ________.
- hexadecimal machine code
- binary machine code
- assembly language
- all of the above