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Table Selection of Key Type, Data and Scan Order Disclosure Number: IPCOM000056487D
Original Publication Date: 1980-Dec-01
Included in the Prior Art Database: 2005-Feb-14

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Dahl, JP Fox, JE Williams, JA [+details]


Microprocessor-based keyboards are more flexible in providing users with different functions. These functions include the ability to vary the number of keys and the arrangement of them on a keyboard, as well as the key functions, reaction times, tactile sensations, audible sensations, electrical interface operations and the data associated with the keys themselves, for example. This article shows how a key's scan position and data and function can all be changed without reprogramming the entire microprocessor by only changing the table content contained in program memory associated with the microprocessor.