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. 30, 1996
Filed:
Feb. 03, 1995
Glen E Offord, Macungie, PA (US);
AT&T Corp., Murray Hill, NJ (US);
Abstract
A novel mad/write control register uses the same bus port for reading and writing, while requiting only one unique control line. The technique may be implemented as a 'D' type level sense latch. The write operation is similar to standard latch operation: the transmission gate on the D input is turned on while the feedback transmission gate is off. However, for read operation, both transmission gates are enabled, thereby allowing the register output value to drive the bus. A preset or clear capability may optionally be provided. This approach reduces the size of the register as compared to standard read/write registers, and requires only one unique control line versus two, thus reducing decoding logic and routing. Since only one port to the bus is required, the bus load gate capacitance is typically one-half that of the standard approach.