David A Mccall

US Patent:

62790730, Aug 21, 2001

Filed:

Sep 30, 1999

Appl. No.:

9/410137

Inventors:

David E. McCracken - San Francisco CA
David L. McCall - Eau Claire WI

Assignee:

Silicon Graphics, Inc. - Mountain View CA

International Classification:

G06F 1200

US Classification:

711105

Abstract:

A configurable synchronizer (10) for DDR-SDRAM (12) is provided that includes a strobe select module (40) operable to receive a memory select signal (106) and to pass strobe signals (20, 30) from one or more DDR-SDRAMs (16, 18) to a number of synchronizer circuits (44) corresponding to data signals (17) passed in parallel by each DDR-SDRAM as indicated by the memory select signal (106). A rising edge latch (174) receives a rising edge data signal (170) and latches the rising edge data signal (170) through the rising edge latch (174) on a rising edge of the strobe signal (152). A falling edge latch (176) receives a falling edge data signal (172) and latches the falling edge data signal (172) through the falling edge latch (176) on a falling edge of the strobe signal (152). A data signal selector (180) receives a data order control signal (195) and forwards the rising edge data signal (170) from the rising edge latch (174) to an intermediate output (196) on either a rising edge of a memory clock cycle (193) or a falling edge of a memory clock cycle (193) followed by forwarding the falling edge data signal (172) from the falling edge latch (176) to the intermediate output (196) on an opposite edge of the memory clock cycle (193) in response to the data order control signal (195). An output latch (202) receives the intermediate output (196) and latches the intermediate output (196) through the output latch (202) to an output signal (154) on each core clock cycle (190).

US Patent:

20200374700, Nov 26, 2020

Filed:

Sep 28, 2018

Appl. No.:

16/957684

Inventors:

- Santa Clara CA, US
Edward Agis - San Jose CA, US
Eduardo Cabre - Chandler AZ, US
Jeremy Rover - Portland OR, US
David J. McCall - Dallas TX, US

International Classification:

H04W 12/06
H04L 9/32

Abstract:

Various systems and methods for testing devices, issuing certificates, and managing certified devices, are discussed herein. A system is configured for using platform certificates to verify compliance and compatibility of a device when onboarding the device into an internet of things (IoT) network. The system may use an approved product list to verify compliance and compatibility for the device. When the device is certified, the system may use an onboarding tool to onboard the device into the IoT network.