Consider the following LED light display for digits, al, , a7 are the lighting e

Question

Consider the following LED light display for digits, al, , a7 are the lighting edge for each edge. The digits 0~9are represented as the following. Assume that we use 4 input bits as binary representation of 0~9. For example, 0000 for 0, 0001 for 1, , and 1001 for 9. We denote i4, i3, i2, i1 for the bit 3, bit 2, bit 1, and bit 0, respectively. Generate truth tables for ala7 lighting edges given input bits of i4, i3, i2, i1. Based on your truth table, generate the sum of product expression for ala7. Implement a PLA for the LED light display.

Explanation / Answer

here is already a truth table:

http://macao.communications.museum/images/exhibits/2_18_6_2_eng.png

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