Electronic digital logic circuitry – Multifunctional or programmable – Having details of setting or programming of interconnections...
Patent
1995-05-09
1997-03-04
Hudspeth, David R.
Electronic digital logic circuitry
Multifunctional or programmable
Having details of setting or programming of interconnections...
326 40, H03K 190175
Patent
active
056083416
ABSTRACT:
A circuit for selecting different applications based upon the manner in which external elements are attached. The selection of the applications is controlled based on the potential detected at a pin immediately following reset. The voltage at a node of the application sense pin is compared with a reference voltage. The pin used to sense the application is used as a sense immediately after reset has occurred. After this it can function as either an output or an input. A flip-flop is connected such that the output of the application sense pin and the condition of reset is directed appropriately to the flip-flop. When the condition of not-in-reset is sensed, the flip-flop latches to a first condition or to a second condition based on the potential at the application sense pin. A binary select allows 2.sup.n different applications to be selected where n is the number of pins used to select the application. When a first binary code is sensed, a first application is implemented. When a second binary code is existent, a second application is implemented. The application sense may be used to select an LED display scheme or another application function.
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Hudspeth David R.
Level One Communications Inc.
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