ECE 198 Lecture : Discussion3 - TA Guide.pdf
4 Jun 2014
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Document Summary
The seven-segment display (right) was first patented in 1908 as an expensive method for displaying decimal numbers. Despite its age, the seven-segment display is still commonly used in electronics today in digital clocks, calculators, meters, and other basic devices because it is cheap and consumes little power. In this discussion section worksheet, you will explore how we create digital logic drivers for these displays by solving for boolean expressions that control the various segments. Generally, we use a 4-bit input (b3b2b1b0) to determine whether each of the seven output segments (a, b, c, d, e, f, g) turns on or off (is 1 or 0). The four bit input encodes the decimal digits 0 through 9 in 4-bit unsigned binary (b3b2b1b0 = 0110 encodes 6). Do not fill in the rows corresponding to 10 through 15 yet. 1: before we create boolean expressions, we need to specify the behavior for the 4-bit unsigned binary encodings of 10-15.
