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Keypad Encoding Using the EDE1144
Jeffery Betts jdb317 Presentation 21 November 6, 2002
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High Level -Similar to keyboard decoder - Serial (2400 or 9600 Baud)
- Good for 4X4(16) or less keypads -Two operating modes - Serial (2400 or 9600 Baud) - Parallel
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Keypad to Keypad Encoder
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Timing diagram for keypad encoder
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Basic Wiring Schematic
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Links -ede1144 http://www.jameco.com/Jameco/Products/ProdDS/171969.pdf
-man seg disp -74LS48 -74LS173 Texas Instruments, TTL Logic Book Page2-575
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