In a first aspect, a pipelined hardware implementation of a neural network circuit includes an input stage, two or more processing stages and an output stage. Each processing stage includes one or more processing units. Each processing unit includes storage for weighted values, a plurality of multipliers for multiplying input values by weighted values, an adder for adding products outputted from product multipliers, a function circuit for applying a non-linear function to the sum outputted by th...

An apparatus, program product and method utilize a clustering algorithm based upon trading propensity to generate assignments of circuit elements to clusters or groups to optimize a spatial distribution of the plurality of clusters. For example, trading propensity-based clustering may be used to assign circuit elements such as scan-enabled latches to individual scan chains to optimize the layout of the scan chains in a scan architecture for an integrated circuit design.

In a first aspect, a first method is provided for controlling the flow of data between a first and second clock domain. The first method includes the steps of (1) selecting one of a plurality of ports included in a physical layer interface in the second clock domain to which to send data; and (2) transmitting data from a transmit buffer in the first clock domain to the selected port in the physical layer interface in the second clock domain. Numerous other aspects are provided.

In a first aspect, a first method is provided for removing entries from an address cache. The first method includes the steps of (1) writing data to a register; and (2) removing a plurality of address cache entries from the address cache based on the data written to the register. Numerous other aspects are provided.

A method for removing an external frequency divider and clock formation circuit from a feedback path of a phase locked loop and a phase selector circuit are provided for synchronizing an external frequency divider with a reference clock of a phase locked loop. A reference clock signal is applied to the phase locked loop. An output of the phase locked loop is coupled through a predefined delay and provides a delayed feedback clock signal input to the phase locked loop. The external frequency divi...

An apparatus, program product and method automatically back annotate a functional definition of a circuit design based upon the physical layout generated from the functional definition. A circuit design may be back annotated, for example, by generating a plurality of assignments between a plurality of circuit elements in the circuit design and a plurality of signals defined for the circuit design using a physical definition of the circuit design that has been generated from the functional defini...

An apparatus, program product and method utilize heuristic clustering to generate assignments of circuit elements to clusters or groups to optimize a desired spatial locality metric. For example, circuit elements such as scan-enabled latches may be assigned to individual scan chains using heuristic clustering to optimize the layout of the scan chains in a scan architecture for a circuit design.

A frequency shift detection circuit for detecting a frequency shift between a first signal and a second signal includes two or more delay circuits coupled to one another in series and two or more comparison logic circuits. The first delay circuit in the series receives one of the first and second signals and produces a delayed replica. Each of the other delay circuits receives the delayed replica produced by the previous delay circuit in the series and produces a further delayed replica. Thus, t...

A method and apparatus are provided for implementing direct memory access (DMA) with dataflow blocking for users for processing data communications in a communications system. A DMA starting address register receives an initial DMA starting address and a DMA length register receives an initial DMA length. A DMA state machine receives a control input for starting the DMA. The DMA state machine updates the DMA starting address to provide a current DMA starting address. The DMA state machine loads ...

A method and apparatus are provided for target addressing and translation in a non-uniform memory environment with user defined target tags. The apparatus for target addressing and translation includes a processor and a first address translation unit coupled to the processor. The first address translation unit translates an effective address (EA) to a real address (RA). The first address translation unit includes a target tag associated with each address translation. A second address translation...