摘要:
Some embodiments of the invention provide a configurable integrated circuit (“IC”). This IC includes several configurable logic circuits for receiving configuration data and configurably performing a set of operations based on the configuration data. It also includes several hybrid circuits. Each particular hybrid circuit has: (1) a set of inputs, (2) a set of outputs for selectively connecting to the set of inputs, and (3) a set of select lines for receiving select signals that direct the hybrid circuit to connect the input set to the output set in a particular manner. At least one select signal is for controllably receiving configuration data and at least one select line is for controllably receiving signals generated by the configurable logic circuits.
摘要:
Some embodiments of the invention provide a configurable integrated circuit (IC). The IC includes first and second circuits. The first circuit is a logic circuit for receiving configuration data sets and performing at least a first function when receiving a first configuration data set and a second function when receiving a second configuration data set. The second circuit communicatively couples to the first logic circuit. The second circuit is for supplying configuration data sets to the first logic circuit. The second circuit has a first set of input terminals. The integrated circuit also has a second set of input terminals for carrying data. Several the second set of input terminals overlap several of the first set of input terminals. The IC also has a set of vias, where each via connects an input terminal in the first set with an input terminal in the second set.
摘要:
Some embodiments of the invention provide a first configurable integrated circuit (IC) that has a first configurable IC design. The first configurable IC implements a second IC design that is specified for a second IC that is to operate a particular design rate. The first configurable IC includes several configurable logic circuits. Each configurable logic circuit can configurably perform a set of functions. The IC also includes several configurable interconnect circuits that configurably couple the logic circuits. At least several configurable circuits can reconfigure faster than the particular design rate.
摘要:
Some embodiments of the invention provide a configurable logic circuit. The logic circuits has inputs for receiving input data. It also has a first connecting circuit for receiving configuration data and at least a portion of the input data. Based at least partially on the received portion of the input data, the first connecting circuit selects configuration data sub-sets. The logic circuit also includes a second core-logic circuit for receiving configuration data sub-sets from the first connecting circuit and for providing the output data. At least two configuration data sub-sets configure the configurable logic circuit to perform at least two different functions on the input data to produce output data.
摘要:
Some embodiments of the invention provide configurable integrated circuit (IC) that has a first interface rate for exchanging signals with a circuit outside of the configurable IC. The configurable IC has an array of configurable circuits. The array includes several configurable logic and interconnect circuits. Each configurable logic circuit can configurably perform a set of functions. The configurable interconnect circuits can configurably couple the logic circuits. At least several of the configurable circuits can be reconfigured faster than the first rate.
摘要:
A low power sub-cycle reconfigurable conduit is provided. The low power reconfigurable conduit is a clocked storage element that consumes less power when performing low-throughput operations that do not require sub-cycle rate. The low power conduit includes a first configurable routing multiplexer that is reconfigurable to select one of several inputs at a first clock rate. The low power conduit also includes an array of storage elements for storing output data from the configurable routing multiplexer at the first clock rate. Each storage element in the array of storage elements operate at a second clock rate that is slower than the first clock rate. Each storage element receives a different phase of a clock that operates at the second clock rate. The low power conduit also includes a second configurable routing multiplexer that is reconfigurable to select from the array of storage elements at the first clock rate.
摘要:
Some embodiments provide a method of designing an integrated circuit (IC). The design is expressed as a graph that includes several nodes that represent several IC components. The nodes include a first set of nodes that represent a set of clocked elements. The method creates a second set of nodes by removing all nodes in the first set from the nodes that represent the IC components. The method identifies a set of edges that connect two nodes in the second set without encompassing a third node in the second set. The method assigns an event time to each node in the second set. The method assigns a cost function based on the event times of the nodes connected by each edge and the number of nodes in the first set encompassed by each edge. The method optimizes the cost function and places the components based on the cost function optimization.
摘要:
Some embodiments provide a method of monitoring the implementation of a user design in a configurable integrated circuit (IC). The method receives a user design for an IC and optimizes the user design to produce a second IC design. The optimization results in the elimination of circuit element(s). The method defines the second IC design for the configurable IC and generates output data for the eliminated circuit element(s) to allow for monitoring the user design.
摘要:
An abstract decision module primitive for placement within a logical representation (i.e., a netlist) of a circuit design is described. The decision module primitive receives as inputs alternative solutions for a given function or segment of a netlist. The alternative solutions include functionally equivalent, but structurally different implementations of the function or segment of the netlist. The decision module primitive alternatively selects between connecting one of the inputs to the netlist to provide a complete functional definition for the netlist based on constraint information. The selected input of the decision module may be updated as additional constraint information is determined throughout the various stages of the design process. In addition, alternative solutions for a given function or segment of the netlist may be added to and/or removed from the inputs of a decision module as additional constraint information is identified.
摘要:
Some embodiments provide a method of monitoring the implementation of a user design in a configurable integrated circuit (IC). The method receives a user design for an IC and optimizes the user design to produce a second IC design. The optimization results in the elimination of circuit elements(s). The method defines the second IC design for the configurable IC and generates output data for the eliminated circuit element(s) to allow for monitoring the user design.