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Electronics and Communication Engineering - Microprocessors

Exercise : Microprocessors - Section 7
41.
Microprocessor 386SX is a 16/32 bit microprocessor. It has
16 bit registers and 32 bit data bus
16 bit registers and 16 bit data bus
32 bit registers and 32 bit data bus
32 bit register and 16 bit data bus
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.

Assertion (A): An instruction cycle consists of fetch and execute cycles.

Reason (R): Fetch cycle has one machine cycle but execute cycle may have one or more machine cycles depending on length of instruction.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct R is wrong
A is wrong R is correct
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
Instruction cycle is the time required to complete the execution of an instruction.
True
False
Answer: Option
Explanation:
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44.
The contents of F register in 8085 are 01010001. This means
S = 0, Z = 1, AC = 1, P = 0 and CY=1
S = 1, Z = 1, AC = 1, P = 0 and CY=1
S = 1, Z = 0, AC = 1, P = 0 and CY=1
S = 1, Z = 0, AC = 0, P = 0 and CY=1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
In a microprocessor
one machine cycle is equal to one clock cycle
one clock cycle consists of several machine cycles
one machine cycle consists of several clock cycles
one machine cycle is always less than one clock cycle
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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