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:
Sep. 20, 1977
Filed:
Jun. 07, 1976
Thomas H Bennett, Scottsdale, AZ (US);
Michael F Wiles, Phoenix, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A digital system comprises a plurality of metal-oxide-semiconductors (MOS) chip random access memory (RAM) and read only memory (ROM) and peripheral interface adaptor circuits used as part of the computer coupled to a common bidirectional data bus which is coupled to and controlled by a microprocessor unit (MPU) chip. In the digital system, data transfers on the common bidirectional data bus are accomplished without the use of a memory synchronization signal so that a special signal conductor indicating when the memory is ready to transfer data is not required. This is accomplished by logic circuitry which expands a clock signal pulse which is applied to the microprocessor chip whenever a memory location is addressed which has a longer access time than is consistent with the width of the pulse ordinarily applied to the microprocessor to effect its operation.