Transcription of 8086 Interfacing Examples - EduTechLearners
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Example: air traffic controller
8086 Interfacing Examples - EduTechLearners
8086 Interfacing ExamplesInterfacing To Alphanumeric Displays Togive directionsordata valuestousers, many microprocessor-controlled instrumentsandmachines needtodisplay lettersofthealphabet and where a large amountofdataneedstobedisplayed a CRTisusedtodisplay the only a small amountofdataneedstobedisplayed, simple digit-type displays are often used. There are several technologies usedtomake these digit-orienteddisplaysbutweare discussing only the two major types. These arelight emitting diodes(LED)andliquid-crystal displays(LCD). LCD displays use verylowpower,sothey are often usedinportable,battery- powered instruments. Theydonot emit their own light, theysimply change the reflectionofavailable light. Therefore, foraninstrument thatistobeusedinlow- light conditions, you havetoinclude a light source for LCDsoruse LEDs which emit theirownlight. Alphanumeric LED displays are availableinthree common formats. Fordisplaying only numberandhexadecimal letters, simple 7-segmentdisplays suchasthatasshowninfig are Todisplay numbers and the entire alphabet,18segment displayssuchasshowninfigor5 by7 dot-matrix displays suchasthatshowninfig canbeused.
•Intersil ICM7211M can be connected to drive a 4-digit, nonmultiplexed, 7- segment LCD display. 15 • The 7211M input can be connected to port pins or directly to microcomputer bus. We have connected the CS inputs to the Y2 output of the 74LS138 port decoder.
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