Thapar University 2007 M.Tech Electronics and Communication Engineering hardware discription language vl006 - Question Paper

hardware discription language vl006
second mid semester exams

Electronics & Communication Engineering Department M.E. (EC) I^s' Year, VlTech I^s' Year (VLSI Design & CAD)

VL006 Hardware Description Languages (9^,h April, 2007)

Second Mid Semester Exam Time: 60 min    Marks: 12

NOTE: Attempt all questions strictly in sequence.

1.    Write a resolution function for resolving multiple values from tristate drivers.    (3)

2.    Write the description of a half subtractor using direct instantiation.    (3)

3.    Write a procedure called scan_results with an in mode bit-vector signal parameter results, and out mode variable parameters majority_value of type bit, majority _count of type natural and tie of type Boolcan.Thc procedure counts the occurrences of 0 and I values in results. It sets majority_value to the most frequently occurring values, majority_count to the number of occurrences and tie to true if there are an equal number of occurrences of 0* and 1 *. (4)

4.    Write a block with a guard expression that is true when a signal en=T or *H\ The block should contain a guarded signal assignment statement that assigns an inverted version of the signal A to the signal z_out when the guard expression is true. Declare the GUARD signal explicitly within the block.    (2)

Attachment: thapar-university-2007-m-tech-electronics-and-communication-engineering-26263-1.bmp

Earning:   Approval pending.