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:
Apr. 24, 2007
Filed:
Nov. 07, 2003
Paul J. Patchen, Arlington, TX (US);
William V. Miller, Arlington, TX (US);
Paul J. Patchen, Arlington, TX (US);
William V. Miller, Arlington, TX (US);
VIA Technologies, Inc. of Taiwan, Taipei, TW;
Abstract
An improved program status register is disclosed with a feature to handle state change for a processor and its memory subsystem. The program status register comprises a clock, at least one update value for updating the program status register to a second value from a first value when an update enable signal is received, a sampled program status register storing the first value of the program status register, and a state change sampling register generating a synchronized state change signal from a state change indication signal and the clock. When the update enable signal is initially received and a state change indication signal is further received thereafter during a first clock cycle, an updated output of the program status register is restored through a first selection module triggered by the synchronized state change signal to the first value in a second clock cycle following the first clock cycle.