APSC 160 Lecture Notes - Lecture 10: Screencast, Lookup Table
16 Mar 2018
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Document Summary
7-segment displays are output devices that provide a low-cost way of displaying numbers etc. Displaying a 0 or a 1 requires one bit of information, which is on or off in the led case. If we want to increase the range of numbers, such as from 0 to 255, we can display 8 bits, using binary. However, configuring 8 leds in a row to represent a value is not practical, as it is difficult to read and interpret. For a more convenient and user friendly configuration we can assign a letter to each of the leds for reference, thus called 7-segment display. Including the period led, there are actually 8 segments. This is a much better way of displaying numbers from 0 to 9. For multiple digits, we can use multiple 7-segment displays. Since there are 8 segments, we need a byte to map each of the segments (one bit) to the letters.
