Using bitmasks to provide visual indication of operational...

Communications: electrical – Visual indication

Reexamination Certificate

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Details

C340S691100, C340S691600, C340S815450

Reexamination Certificate

active

07098801

ABSTRACT:
Method and apparatus for providing a visual indication of operational activity of a device, such as a selected data transfer state. A pattern generator provides one or more bitmasks, each comprising a selected multi-bit sequence of logical values. A switching circuit selectively activates a visual indicator, such as a light emitting diode (LED), to provide a different visual indication in relation to each bitmask. Preferably, a time-varying rate at which the visual indicator is activated in response to each bitmask is selected to be different from a rate, as perceived by a human observer, of activation of the indicator. The pattern generator is preferably implemented as a programming module in a memory space and executed by a processor. Alternatively, the pattern generator is implemented in hardware preferably through the use of an index table and shift register circuitry.

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