摘要:
A processor isolation technique enhances debug capability in a multiprocessor circuit. A bypass register has a bit location which may indicate that a processor is to be bypassed. A code entry point is selected to permit a downstream processor to do the work of the bypassed processor. The processors may be arrayed in a pipeline.
摘要:
A processor isolation technique enhances debug capability in a highly integrated multiprocessor circuit containing a programmable arrayed processing engine for efficiently processing transient data within an intermediate network station of a computer network. The technique comprises a mechanism for programming a code entry point for each processor of a processor complex utilizing a register set that is accessible via an out-of-band bus coupled to a remote processor of the engine. The programmable entry point mechanism operates in conjunction with a bypass capability that passes transient data through a processor complex that is not functional, not running or otherwise unable to process data. Another aspect of the debug technique involves the ability to override completion control signals provided by each processor complex in order to advance a pipeline of the processing engine.
摘要:
A technique is provided for use in testing replicated components (e.g., identical circuit components) of an electronic device for defects. In one aspect of this testing technique, the same test inputs may be broadcast, in parallel, from a single test interface to each of the replicated components of the electronic device under test. Respective test outputs generated by the replicated components in response to the test inputs may be supplied to a comparator, comprised in the electronic device, that compares the respective test outputs to each other and generates a fault signal if corresponding test outputs are not identical. This fault signal may be supplied to an external test interface pin of the single test interface, and its assertion may indicate that one or more of the replicated components may be defective. The respective test outputs may be multiplexed to permit output via an external interface of respective test outputs from a selected component. These respective test outputs may be compared to expected values therefor whereby to determine presence and/or nature of defects in the replicated components.
摘要:
A technique is provided for use in computerized modeling of an electronic system. The technique bases simulation of the system's operation (e.g., timing operation) upon both actual physical characteristics of a part of the system, and hierarchical analysis-based models of the rest of the system.
摘要:
A multi-port switching device architecture decouples decode logic circuitry of each port of a network switch from its respective state machine logic circuitry and organizes the state machine logic as pools of transmit/receive engine resources that are shared by each of the decode logic circuits. Intermediate priority logic of the switching device cooperates with the decode logic and pooled resources to allocate frames among available resources in accordance with predetermined ordering and fairness policies. These policies prevent misordering of frames from a single source while ensuring that all ports in the device are serviced fairly.