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:
Jun. 22, 1999
Filed:
Sep. 26, 1997
Reading G Maley, San Francisco, CA (US);
Amos Ben-Meir, Cupertino, CA (US);
Anil Mehta, Milpitas, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
A processor includes a processing core that is operable at a frequency that is an odd half-integer multiple of a bus clock frequency. Signals on a system bus are synchronized with a selected edge, e.g., the rising edge, of a bus clock signal, but the processing core requires signals synchronized with a processor clock signal. Signal crossing between the clock domain of the processing core and the clock domain of the system bus pass through a storage element that selectably latches a value of the signal either at a rising edge or a falling edge of the processor clock signal. A control circuit selects either rising-edge or falling-edge latching depending on which edge (rising or falling) is closest to being synchronized with the selected edge of the bus clock signal.