Lee W Warner

US Patent:

6512704, Jan 28, 2003

Filed:

Sep 14, 2001

Appl. No.:

09/952951

Inventors:

Chung-Hsiao R. Wu - Sunnyvale CA
Jyh-Ming Jong - Saratoga CA
Lee A. Warner - Redwood City CA
Jurgen M. Schulz - Pleasanton CA

Assignee:

Sun Microsystems, Inc. - Palo Alto CA

International Classification:

G11C 1604

US Classification:

36518907, 365233, 365193, 365194

Abstract:

A data strobe receiver that includes a first comparator. The first comparator has a first input that is coupled to a first reference voltage. The first comparator has a second input that is coupled to a data strobe. The first comparator also has an output. The data strobe receiver also includes a delay element. The delay element has an input that is coupled to the output of the first comparator. The delay element also has an enable input and an output. The data strobe receiver also includes a second comparator. The second comparator has a first input that is coupled to a second voltage reference. The second comparator has a second input that is coupled to the data strobe. The second comparator also has an output. The data strobe receiver also includes a flip-flop. The flip-flop has a preset input that is coupled to the output of the second comparator.

US Patent:

6813267, Nov 2, 2004

Filed:

Sep 11, 2000

Appl. No.:

09/658782

Inventors:

William A. Clayton - Redwood City CA
Lee A. Warner - Redwood City CA
Wayne F. Seltzer - San Jose CA

Assignee:

Sun Microsystems, Inc. - Santa Clara CA

International Classification:

H04L 1228

US Classification:

370390, 370392, 370400, 370414

Abstract:

One embodiment of the present invention provides a system that facilitates packet communication between a device within a computing system and one or more additional devices of the computing system. The system receives either a point-to-point packet or a broadcast packet from the devices and inspects the header of the packet to determine the type of packet. The system also examines the state of the computing system to determine whether the state of the computer system is broadcast preferred or point-to-point only. If the type of the packet is broadcast and the state of the computing system is broadcast preferred, the system sends the packet to all of the additional devices. If the type of the packet is broadcast and the state of the computing system is point-to-point only, the system delays sending the packet until the state of the computing system changes to broadcast preferred. If the type of the packet is point-to-point and the state of the computing system is broadcast preferred, the system delays sending the packet while broadcast packets are available to be sent. Finally, if the type of the packet is point-to-point and the state of the computing system is point-to-point only, the system sends the packet to the addressed device.