Motorola Corporation

David C Campbell

John Wesley Locke

Mark S German

Daniel R Kibel

Alan C Svoboda

A computer system () includes a baseboard () having a first side () and a second side (), where the first side and the second side define a first key opening () and a second key opening (). A mezzanine card interface () is coupled to the baseboard. A keying mechanism () is coupled to interface with the baseboard through the first key opening, where coupling the keying mechanism to the baseboard initiates a first key signal (), and where the first key signal operates a logic circuit () to permit a first operating voltage () to power the mezzanine card interface. Alternatively, the keying mechanism can be coupled to interface with the baseboard through the second key opening, where coupling the keying mechanism to the baseboard initiates a second key signal (), and where the second key signal operates the logic circuit to permit a second operating voltage () to power the mezzanine card interface. This configuration mechanism is repeated for any other mezzanine card interfaces on the baseboard. The logic circuit () disallows the application of operating voltages to the mezzanine card interfaces if the configurations are not compatible with the architecture of the baseboard. In the event of incompatible configurations, the logic circuit also communicates a configuration failure signal to the operator or system manager.

Configurable baseboard to power a mezzanine card and method

Single-source or single-destination signal routing through identical electronics module

A convolving element which processes sixteen 4-bit samples but may be expanded to convolve both a larger number of samples and a larger number of bits per sample. The expansion occurs through interconnections of identical convolving elements. A selective inversion element inverts particular ones of the convolved samples under the control of a previously loaded binary code. The selective inversion element additionally minimizes interconnections and therefore input/output terminals of the convolving element, by permitting carries for each sample convolved to be accumulated rather than to propagate to more significant elements.

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Gilbert, AZ, United States of America

David C Campbell