Birla Institute of Technology (BIT Mesra) 2006 DIGITAL ELECTRONICS AND MICROPROCESSORS - Question Paper

Birla Institute of Technology & Science, Pilani

Distance Learning Programmes Division

Second Semester 2006-2007



Mid-Semester Test

(EC-1 Regular)



Course No. : ES ZC261

Course Title : DIGITAL ELECTRONICS AND MICROPROCESSORS

No. of Pages = 1

No. of ques. = four
Nature of examination : Closed Book

Weightage : 40%

Duration : two Hours

Date of examination : 04/02/2007 (AN)

Note:

1. Please follow all the Instructions to Candidates provided on the cover page of the ans book.

2. All parts of a ques. should be answered consecutively. every ans should begin from a fresh page.

3. Mobile phones and computers of any type should not be brought inside the exam hall.

4. Use of any unfair means will outcome in severe disciplinary action.



Q.1 (a) obtain the complement of then show that and
Q.1 (b) List the truth table of the function . (5 + five = 10)

Q.2. Simplify the subsequent expressions in (1) sum of products and (2) product of sums:

i)
ii) (2 x six = 12)

Q.3. Implement the subsequent Boolean function with a multiplexer:

(6)

Q.4. In 8085 microprocessor:-

(i). If the memory chip size is bits, how many chips are needed to make up 16K-byte memory?

(ii). How many address lines are used to identify an I/O port in the peripheral I/O and in the memory-mapped I/O methods?

(iii). If the 8085 adds 87H and 79H, specify the contents of the accumulator and the status of the S, Z and CY flags. (3 x four = 12)





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Earning:   Approval pending.