Cross-bar switching in an emulation environment

Details Cross-bar switching in an emulation environment Cross-bar switching in an emulation environment

2009-04-10

2010-10-26

Rinehart, Mark (Department: 2111)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus interface architecture

C703S023000, C703S025000

Reexamination Certificate

active

07822909

ABSTRACT:
A system and method are disclosed for crossbar switching in an emulation environment. The switch is designed to coordinate scheduling between different crossbars in the system and to be dynamically reconfigurable during operation. In one aspect, a crossbar switch includes a switching matrix and an array of control cells. The control cells use a high-frequency clock to perform high-speed switching and a low-frequency clock in order to initiate a switching sequence. The low-frequency clock initiates the sequence at a time coordinated with other crossbars in the system to optimize scheduling. In another aspect, the control cells include a memory containing control bits for the switching matrix. The memory may be reconfigured without stopping traffic management through the crossbar switch. In yet another aspect, the high-frequency sequence may provide for the ability to loop. In still another aspect, the crossbar switches may receive multiplexed input signals that can be routed to several crossbar outputs without the need for an internal demultiplexing stage.

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