Title:
DEVICE CONFIGURED TO SWITCH A CLOCK SPEED FOR MULTIPLE LINKS RUNNING AT DIFFERENT CLOCK SPEEDS AND METHODS FOR SWITCHING THE CLOCK SPEED
Document Type and Number:
WIPO Patent Application WO/2011/070328
Kind Code:
A3
Abstract:
A device configured to switch a clock speed for multiple links running at different clock speeds and a method for switching the clock signals are disclosed. A frequency divider derives a plurality of clock signals at different frequencies from a source clock signal. A clock switching controller selects a maximum data rate among data rates requested by a plurality of ports of links and outputs a transmit clock signal at the selected maximum data rate to the ports along with a clock enabling signal for each of the ports. Each of the clock enabling signals selectively enables the transmit clock signal for matching a data rate requested by each port. The clock speed may be selected and updated as required by the ports glitch-free in a known amount of time without interrupting data transfers on any of the other ports.
Inventors:
SENOHRABEK KEVIN D (CA)
BARBIERO NATALE (CA)
CARUK GORDON F (CA)
BARBIERO NATALE (CA)
CARUK GORDON F (CA)
Application Number:
PCT/GB2010/002251
Publication Date:
November 03, 2011
Filing Date:
December 10, 2010
Export Citation:
Assignee:
ATI TECHNOLOGIES ULC (CA)
WALDREN ROBIN MICHAEL (GB)
SENOHRABEK KEVIN D (CA)
BARBIERO NATALE (CA)
CARUK GORDON F (CA)
WALDREN ROBIN MICHAEL (GB)
SENOHRABEK KEVIN D (CA)
BARBIERO NATALE (CA)
CARUK GORDON F (CA)
International Classes:
G06F1/10; G06F1/06; G06F13/40
Foreign References:
| US20060288249A1 | 2006-12-21 |
Other References:
"PCI Express Base Specification Revision 1.0 (Chapter 4: Physical Layer Specification)", 29 April 2002, XP002657159
Attorney, Agent or Firm:
WALDREN, Robin, Michael (90 Long Acre, London WC2E 9RA, GB)
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