CS302 Assignment 3 Solution Spring 2017

Question No. 1 (a)                                                                                                     10 marks

A Seven Segment Decoder is used to decode the given BCD number to display it onto the Seven Segment Display. Block diagram of this process is given in ‘figure 2’.

Figure 1: BCD Inputs
Figure 2: BCD to Seven Segment Display

‘Figure 1’ contains BCD inputs which are applied at BCD to 7 Segment Decoder as a waveform. Your task is to draw waveforms for all segment i.e. a, b, c, d, e, f, g for their respective inputs and also mention the BCD numbers which will be displayed on the Seven Segment Display in sequence for each combination of given inputs.

Question No. 1 (b)                                                                                                     10 marks

You have to write ABEL input file code for a BCD-to-Seven Segment Decoder as discussed in question 1 (a). Your ABEL module must have two sections (Declarations & Test vector using a set) where IC name is 74LS47 and pins 6, 2, 1 and 7 will be used for A3, A2, A1 and A0 respectively as an input.

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