Intel Corporation

Sun Microsystems, Inc.

Christopher Cheng

Sanjay Dabral

Alper Ilkbahar

Leo Yuan

Dilip K Sampath

A system and method of reducing wire-or glitch to improve bus speeds. In a system that supports wire-or functions, the rise time of the wave created by the off-going driver is controlled. The off-going wave is forced to climb gradually such that one propagation delay of the loaded bus later, it is only marginally above a high threshold voltage. The fall time of the wave created by an on-going driver is minimized such that a strong negative going voltage propagates down the bus. This strong negative going voltage drags a composite wave on the bus (i.e. the combination of the waves of the on-going driver and the off-going driver) back below a low threshold voltage approximately one propagation delay after the switching occurs.

Method to reduce wire-or glitch in high performance bus design to improve bus performance

A method and apparatus for configuring the pinout of an integrated circuit. An integrated circuit includes an input/output structure including an input/output port. The input/output structure communicates a first signal in a first configuration and a second signal in a second configuration. The first and second signals are parallel signals of a bus.

Method and apparatus for configuring the pinout of an integrated circuit

A component powered by a first power supply activates a driving signal. The driving signal indicates that both a second power supply voltage has a magnitude greater than a reference voltage and an enable signal is active. A driver transfers the output signal when the driving signal is active. In a multi-processor computer system implementation, each of two processor cores are independently supplied power by each of two core power supplies while a single I/O power supply supplies power to the I/O rings of both processors. Each processor includes a bus isolation circuit to prevent its respective processor from loading the system bus in the event that a core power supply fails.

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Sunnyvale, CA, United States of America

Christopher Cheng