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. 14, 1998
Filed:
Sep. 27, 1993
Toru Baji, San Jose, CA (US);
Hitachi America Limited, Tarrytown, NY (US);
Abstract
A digital signal processor (DSP) provides an improvement in the interfacing and sharing of external memory devices. Specifically, the digital signal processor is provided with a parallel interface for communicating with external memory devices, a chip select decoder located on-chip for selectably enabling external memory devices, and a wait status controller for holding processor operation until the selected memory device is ready. The memory architecture is configurable for internal or external wait state generation and memory sharing with other DSPs so that a plurality of varying speed memory devices may be accessed. The chip select decoder includes a programmable register for storing a mode configuration word for defining a plurality of external memory configurations.