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:
Jul. 16, 1991
Filed:
May. 07, 1990
Applicant:
Inventors:
Monte J Dalrymple, Fremont, CA (US);
Don Smith, Los Gatos, CA (US);
Assignee:
Zilog, Inc., Campbell, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
364200 ; 3642412 ; 3642409 ; 364242 ; 3642715 ;
Abstract
A peripheral device containing a control circuit with internal timing which enables it to independently adjust the timing of an interrupt acknowledge cycle. The circuit senses a timing signal from the CPU and asserts a control signal to suspend the operation of the CPU for a predetermined period of time. The predetermined period of time is customized to the peripheral so that when the CPU is re-activated and reads from the bus, a valid interrupt vector will have been put out by the peripheral.