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:
Nov. 11, 1997
Filed:
Feb. 27, 1996
Shinsuke Saito, Nagoya, JP;
Shigeru Katagiri, Nagoya, JP;
Melco, Inc., Nagoya, JP;
Abstract
The present invention provides an accelerator working in place of a CPU on a motherboard to speed up the processing. The accelerator can realize the high-speed processing even when a clock on the accelerator is not an integral multiple of a clock on the CPU. When a clock frequency of a clock signal CLK on the motherboard is equal to 20 MHz and a maximum frequency of a CPU (3) on an accelerator (100) is equal to 33 MHz, for example, the CPU (3) does not work properly by a doubled clock signal. In such a case, a clock multiplication circuit (3a) multiplies the clock signal CLK by 1.5 times to generate a clock signal CLK15. There are three different patterns in the relationship between the timing of access of the CPU 3 and the timing of access of the motherboard. The accelerator of the invention determines the appropriate timing in each case and allows the access of the CPU 3 to be synchronous with the access of the motherboard.