Invention Grant
- Patent Title: Constant frequency architectural timer in a dynamic clock domain
- Patent Title (中): 动态时钟域中的恒定频率架构定时器
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Application No.: US13472105Application Date: 2012-05-15
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Publication No.: US08990606B2Publication Date: 2015-03-24
- Inventor: Sebastian Turullols , Ali Vahidsafa
- Applicant: Sebastian Turullols , Ali Vahidsafa
- Applicant Address: US CA Redwood City
- Assignee: Oracle International Corporation
- Current Assignee: Oracle International Corporation
- Current Assignee Address: US CA Redwood City
- Agency: Polsinelli PC
- Main IPC: G06F1/00
- IPC: G06F1/00 ; H03K5/01 ; H03L7/00 ; G06F1/12 ; G06F1/14

Abstract:
Implementations of the present disclosure involve an apparatus and/or method for providing a constant frequency timer signal for a microprocessor that operates with varying core clock signals. The apparatus and/or method utilizes a code generator, such as a gray code generator, operating on a reference clock signal that allows the constant frequency timer signal to be either faster or slower than the core clock frequency. More particularly, the apparatus and/or method may compute a difference between previous gray code samples and add the calculated difference to a software visible reference clock signal such that constant frequency timer signal may be faster or slower than the core clock signal. Through the use of the apparatus and/or method, a core clock signal may be reduced as needed to provide operational power savings to the microprocessor and the computing system employing the techniques described herein, while maintaining synchronization between the executing programs of the computing system.
Public/Granted literature
- US20130311814A1 CONSTANT FREQUENCY ARCHITECTURAL TIMER IN A DYNAMIC CLOCK DOMAIN Public/Granted day:2013-11-21
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