Thursday, February 19, 2009

‘Microprocessors Interview Questions’ ----11

‘Microprocessors Interview Questions’ - KyaPoocha.com
Which interrupt is not level-sensitive in 8085?
RST 7.5 is a raising edge-triggering interrupt. Read more »

What are Software interrupts?
RST0, RST1, RST2, RST3, RST4, RST5, RST6, RST7. Read more »

What are the various flags used in 8085?
Sign flag, Zero flag, Auxillary flag, Parity flag, Carry flag. Read more »

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

What is Stack Pointer?
Stack pointer is a special purpose 16-bit register in the Microprocessor, which holds the address of the top of the stack. Read more »

What happens when HLT instruction is executed in processor?
The Micro Processor enters into Halt-State and the buses are tri-stated. Read more »

What does Quality factor mean?
The Quality factor is also defined, as Q. So it is a number, which reflects the lossness of a circuit. Higher the Q, the lower are the losses. Read more »

How many interrupts are there in 8085?
There are 12 interrupts in 8085. Read more »

What is Tri-state logic?
Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open... Read more »

Which interrupt has the highest priority?
TRAP has the highest priority Read more »

What are Hardware interrupts?
TRAP, RST7.5, RST6.5, RST5.5, INTR Read more »

Can an RC circuit be used as clock source for 8085?
Yes, it can be used, if an accurate clock frequency is not required. Also, the component cost is low compared to LC or Crystal Read more »

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