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:
Mar. 19, 1996
Filed:
Oct. 17, 1994
Ichiro Okabayashi, Takatsuki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In a memory access device, each of read and write addresses generated by read and write address generating means is stored in a read or write address buffer through a read or write address latch. The memory is accessed based on an address supplied by either address buffer from the bottom side thereof. Each address generating means is arranged such that, when a generated address is stored in the corresponding address buffer, the address calculation stage is finished. Exception detecting means is arranged to conduct exception detection on each address before the address is supplied from the corresponding address buffer, i.e., while the address is being latched by the corresponding address latch. Accordingly, the exception detection on each address can be conducted independently from a pipeline operation, thus shortening the execution time of each calculation stage. This prevents the calculation stage from forming a critical path.