The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 16, 2001
Filed:
Aug. 25, 1998
Tommaso Bacigalupo, San Jose, CA (US);
Infineon Technologies North America Corp., Iselin, NJ (US);
Abstract
A clock generator supplying clock signals to a synchronous system is disabled in response to a first synchronous signal from the synchronous system and enabled in response to an asynchronous signal. Upon the enabling of the clock generator in response to the synchronous signal, a second synchronous signal is transmitted to the synchronous system to notify the system that the clock generator is enabled. In the preferred embodiment, the register bits in a shift register are set by the first synchronous signal to a value that disables the clock generator and then the register bits can be set by an asynchronous signal to a value that enables, or wakes up, the clock generator. The first synchronous signal that is used to disable the clock generator is also used to initiate a synchronous counter that counts a pre-established number of clock signals from the clock generator and then transmits a synchronous wake-up signal to the synchronous system. Utilizing the counter and the shift register allows a clock generator to be restarted with an asynchronous signal while maintaining clean separation between the synchronous and asynchronous domains of an electrical system.