| Patent application number | Description | Published |
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| 20080222583 | METHOD AND SYSTEM FOR LOGIC VERIFICATION USING MIRROR INTERFACE - Verification of external interfaces of cores on system-on-chip (SOC) designs frequently entails the purchase of costly standardized software models to test the external interfaces. Typically, the standardized models provide more functionality than is needed. Instead of standardized models, test models may be developed and utilized, but this also incurs cost and delay. The present invention provides an efficient and economical alternative. A mirror interface, or copy of the external interface undergoing verification, is used with a standardized control mechanism to verify the external interface. Because all interface I/O connections can thereby be utilized, a cost-effective and highly reusable way of verifying such interfaces is provided. | 09-11-2008 |
| 20080276034 | Design Structure for Transmitting Data in an Integrated Circuit - A design structure, which may be generated by a fabless design company, for transmitting data between cores residing in an integrated circuit. Data is transmitted by using hubs located between the cores and an arbiter. The arbiter maintains a table that contains all the valid combinations of routing paths between the cores. | 11-06-2008 |
| 20080312896 | Optimal bus operation performance in a logic simulation environment - Sample-count feedback from bus functional models and a binary convergence algorithm are to generate optimal sampling values for an accelerator, or hardware assisted simulator. The simulator includes a bus functional model and a driver program. A software readable register maintains a count of a number of samples provided the simulator in execution of a transaction on the bus functional model. For each supported bus functional model, a sample count retrieved from the bus functional model and a last sampling value given the hardware assisted simulator is maintained, and a binary convergence algorithm applied to generate sampling values based on the last sampling value given to the hardware assisted simulator and the last actual sampling value used by a given bus functional model for a transaction. | 12-18-2008 |
| 20090045839 | ASIC LOGIC LIBRARY OF FLEXIBLE LOGIC BLOCKS AND METHOD TO ENABLE ENGINEERING CHANGE - A chip design methodology and an integrated circuit chip. The methodology includes providing a plurality of logic gates in a net list, wherein each of the logic gates comprises at least one spare input, synthesizing the net list, and connecting the spare inputs for performing an engineering change late in the design process. The invention is also directed to a design structure on which a circuit resides. | 02-19-2009 |
| 20090183134 | DESIGN STRUCTURE FOR IDENTIFYING AND IMPLEMENTING FLEXIBLE LOGIC BLOCK LOGIC FOR EASY ENGINEERING CHANGES - A design structure for identifying engineering changeable logic, and replacing the identified engineering changeable logic with flexible logic blocks (FLB). The design structure is embodied in a machine readable medium for designing, manufacturing, or testing an integrated circuit. | 07-16-2009 |
| 20090183135 | Method and Device for Identifying and Implementing Flexible Logic Block Logic for Easy Engineering Changes - A chip design methodology. The methodology includes identifying engineering changeable logic, and replacing the identified engineering changeable logic with flexible logic blocks (FLB). | 07-16-2009 |
| 20090265677 | INTEGRATED TEST WAVEFORM GENERATOR (TWG) AND CUSTOMER WAVEFORM GENERATOR (CWG), DESIGN STRUCTURE AND METHOD - Disclosed are embodiments of a clock generation circuit, a design structure for the circuit and an associated method that provide deskewing functions and that further provide precise timing for both testing and functional operations. Specifically, the embodiments incorporate a deskewer circuit that is capable of receiving waveform signals from both an external waveform generator and an internal waveform generator. The external waveform generator can generate and supply to the deskewer circuit a pair of waveform signals for functional operations. The internal waveform generator can be uniquely configured with control logic and counter logic for generating and supplying a pair of waveform signals to the deskewer circuit for any one of built-in self-test (BIST) operations, macro-test operations, other test operations or functional operations. The deskewer circuit can selectively gate an input clock signal with the waveform signals from either the external or internal waveform generator in order to generate the required output clock signal. | 10-22-2009 |
| 20090267660 | Circuit and design structure for synchronizing multiple digital signals - Disclosed is a circuit configured to synchronize multiple signals received by one clock domain from a different asynchronous clock domain, when simultaneous movement of the signals between the clock domains is intended. In the circuit multiple essentially identical pipelined signal paths receive digital input signals. XOR gates are associated with each of the signal paths. Each XOR gate monitors activity in a given signal path and controls, directly or indirectly (depending upon the embodiment), advancement of signal processing in the other signal path(s) to ensure that, if warranted, output signals at the circuit output nodes are synchronized. In a two-signal path embodiment, advancement of signal processing in one signal path is triggered, whenever transitioning digital signals are detected within the other signal path. In an n-signal path advancement of signal processing is triggered in all signal paths, whenever transitioning digital signals are detected on at least one signal path. | 10-29-2009 |
| 20100017773 | Method for Minimizing Impact of Design Changes For Integrated Circuit Designs - A method is provided for updating an existing netlist to reflect a design change. A design incorporating the design change and the existing netlist are provided to a synthesis tool. The design and the existing netlist are processed with the synthesis tool reusing logic structures from the existing netlist. A result is generated by the synthesis tool including the existing netlist and a new portion of a netlist reflecting the design change. | 01-21-2010 |
| 20100039150 | METHOD, CIRCUIT, AND DESIGN STRUCTURE FOR CAPTURING DATA ACROSS A PSEUDO-SYNCHRONOUS INTERFACE - A method for source synchronous communication. The method includes dynamically adjusting a delay that is applied to a data signal and a remote clock signal until a delayed remote clock signal is synchronized with a local clock signal, and capturing data from a delayed data signal associated with the delay in a local domain. | 02-18-2010 |
| 20100040183 | METHOD, CIRCUIT, AND DESIGN STRUCTURE FOR CAPTURING DATA ACROSS A PSEUDO-SYNCHRONOUS INTERFACE - A structure for performing cross-chip communication with mesochronous clocks. The structure includes: a data delay line; a remote clock delay line; a structure that captures at least one value of a state of a delayed remote clock signal on the remote clock delay line; and a control that influences a delay associated with the data delay line and the remote clock delay line. | 02-18-2010 |
| 20100194459 | CIRCUIT AND DESIGN STRUCTURE FOR SYNCHRONIZING MULTIPLE DIGITAL SIGNALS - Disclosed is a circuit configured to synchronize multiple signals received by one clock domain from a different asynchronous clock domain, when simultaneous movement of the signals between the clock domains is intended. In the circuit multiple essentially identical pipelined signal paths receive digital input signals. XOR gates are associated with each of the signal paths. Each XOR gate monitors activity in a given signal path and controls, directly or indirectly (depending upon the embodiment), advancement of signal processing in the other signal path(s) to ensure that, if warranted, output signals at the circuit output nodes are synchronized. In a two-signal path embodiment, advancement of signal processing in one signal path is triggered, whenever transitioning digital signals are detected within the other signal path. In an n-signal path advancement of signal processing is triggered in all signal paths, whenever transitioning digital signals are detected on at least one signal path. | 08-05-2010 |
