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Handling Multiple Devices
Interrupt Priority
Controlling device requests
KEN, DEN
Implementation of interrupt priory by using individual interrupt-request and acknowledge lines
Polled interrupts: Priority decided by the order in which processor polls the component (polls their status registers) vectored interrupts: Priority determined by the order in which processor tells component toput its code on the address lines (order of connection in the chain)
(a) Daisy chain
Daisy chaining of INTA: If device has not requested any service, passes the INTA signal to next device if necessitate service, does not pass the INTA, puts its code on the address lines Polled
Error detection mechanism may include checking mechanical and data communication errors. These errors must be reported to processor. The illustrations of kind of mechanical errors
Q. Explain how does CPU perform Read and Write operation on peripheral device taking suitable example in case of Synchronous Technique.
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an asyncronous sequential circuit is described by the the exitatio function and the output function y=x1x2''+(x1=x2'')y output function z=y a)draw the logic diagram of the circuit.
Define underflow and overflow. Underflow: If the result the arithmetic operation including n-bit numbers is too small to show by n-bits, underflow is said to occur. Overflow
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Q. Describe Message Passing Model? In message-passing model there be a set of tasks which employ their own local memories at the time of computation. Many tasks may inhabit on
Main Objectives: • MPLAB In-Circuit Debugger (ICD 2) functionality • ICD 2 Connection design • MPLAB ICD 2 setup with the PC and Interface board designed • I²C Protocol buses tech
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