Intel Corporation

Alan S Geist

Alan Beecher Kyker

David M Lee

Michael C Rifani

Some implementations disclosed herein provide techniques and arrangements for transferring data between asynchronous clock domains. A synchronization signal may be generated by a first of the clock domains, and data may be transferred between the domains in response to the synchronization signal. Clock cycles of the second of the clock domains may be monitored in comparison to the synchronization signal to report the number of second clock domain cycles occurring per occurrence of the synchronization signal. This information may be recorded by testing and validation equipment to facilitate error analyses.

Data transfer between asynchronous clock domains

A method and apparatus for matching rise time and fall time in two differential signals. The apparatus includes a system that includes an scaled summer, a reference voltage generator, a comparator, and a storage device. The scaled summer receives two input signals and generates an instantaneous scaled sum of the two input signals. The reference voltage generator generating a reference voltage. The comparator compares the scaled summer output signal and the reference voltage and generates a comparison signal. The storage device stores the comparison signal. The stored comparison signal is usable to adjust one of the rise time and the fall time of both of the two input signals to match one of the fall time and the rise time of the two input signals.

Apparatus and method for automatic matching of signaling rise time to fall time

A router for routing a message among nodes in an N dimensional network of processor nodes. The router includes a message logic unit determining in which direction the message is traveling in the network. The router features a number of (D) of express ports, each express port having an input for inputting and an output for outputting the message in a corresponding one of (D) express directions. A routing logic unit in the router is capable of transmitting the message in a selected express direction through a corresponding local port, each local port inputting and outputting the message in one dimension of the network. The routing logic unit also includes express routing logic that is capable of transmitting the message in the selected express direction through a corresponding express port. The message logic unit includes detection logic for determining the distance in each dimension remaining to be traveled by the message to a destination node. The routing logic unit transmits the message in the express direction through the express port if the remaining distance in the express direction is greater than or equal to a quantity S, where S is greater than or equal to 2N/D. The routing logic unit transmits the message in the express direction through the local port if the remaining distance in the express direction is less than S.

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Portland, OR, United States of America

Alan S Geist