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CS501 Advance Computer Architecture Non Graded Assignment 3 Solution Fall 2013

Question No. 1:                                                                                     Marks 10

Given below is a 2×1 Multiplexer having 2 input lines (D0 & D1), one select input (S) and one output line (Y).

IF S=0, then Y= D0

Else (S=1) Y= D1

Figure

Thus, the output signal Y can be expressed as:

Y = S D0 + S D1

You are required to draw an 8×1 complete multiplexer with complete output signals.

Hint:

There will be three selected inputs in 8×1 multiplexer, i-e S0S1 and S2

Question No. 2:                                                                                     Marks 5

Consider an I/O bus that can transfer 4 bytes of data in one bus cycle. Suppose that a designer considers attaching the following two components:

 

  1. Hard drive, with a transfer rate of 54 Mbytes/sec
  2. Video card, with a transfer rate of 128 Mbytes/sec.

What might be the implications of both the cases in above scenario?

Hint:
Maximum frequency of the bus is 30 MHz10

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