Microprocessors - Question and Answer - 8

36. In 8085 name the 16 bit registers?
Stack pointer and Program counter all have 16 bits.

37. What are the different types of microprocessor ?
RISC Processor: - Reduced Instruction Set Computer. It is designed to reduce the execution time by simplifying the instruction set of the computer.
CISC Processor: - Complex Instruction Set Computer. It is designed to minimize the number of instructions per program, ignoring the number of cycles per instruction.
Special Processor: - These processors are designed for special purposes. Some of the special processors are as follows
a. Co processor
b. Input/output Processor
c. Transputer
d. Digital Signal Processor

38. Explain briefly the trap input for 8085 ?
Trap responds to both edge and level.
The pulse width for trap input should be more than normal noise width.
The second trap never responds second time as the first trap goes from high to low transition.
To prevent unwanted false triggers pulse width should be wider than normal widths.

39. Where does CPU enhanced mode originate from ?
Intel’s 80386 was the first 32-bit processor so the company had to backward support 8086. All the modern Intel-based processors run in the enhanced mode which is capable to switch between real mode and protected mode, which is the current mode of operation.

40. What is 1st / 2nd / 3rd / 4th generation processor ?
The processor made of PMOS / NMOS / HMOS / HCMOS technology is called 1st / 2nd / 3rd / 4th generation processor, and it is made up of 4 / 8 / 16 / 32 bits.

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