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. 27, 1990
Filed:
Oct. 23, 1987
Judy L Teske, Burnsville, MN (US);
Daniel J Baxter, St. Paul, MN (US);
Don A Daane, Burnsville, MN (US);
Brian D Borchers, Burnsville, MN (US);
David H Allen, Eagan, MN (US);
Michael F Maas, Maplewood, MN (US);
Control Data Corporation, Minneapolis, MN (US);
Abstract
This application describes a peripheral cell structure for VLSI chips that requires the use of standard cells having both input and output capability connected to nearly all of the signal carrying pins. The cells function is alterable (to input or output and to where the data input signals originate) by control signals which may originate with a control register. The clock input signal is split into two independent signals to selectively disable the input or output registers, thus allowing the control register to be changed without affecting the contents of the other two registers. An early signal is also provided to prepare for mode changes.