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:
Dec. 29, 2009
Filed:
May. 26, 2005
Sumanth Katte Gururajarao, Dallas, TX (US);
Hugh T. Mair, Fairview, TX (US);
David B. Scott, Plano, TX (US);
Uming Ko, Plano, TX (US);
Sumanth Katte Gururajarao, Dallas, TX (US);
Hugh T. Mair, Fairview, TX (US);
David B. Scott, Plano, TX (US);
Uming Ko, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
In a method and system for data retention, a data input is latched by a first latch. A second latch coupled to the first latch receives the data input for retention while the first latch is inoperative in a standby power mode. The first latch receives power from a first power line that is switched off during the standby power mode. The second latch receives power from a second power line. A controller receives a clock input and a retention signal and provides a clock output to the first latch and the second latch. A change in the retention signal is indicative of a transition to the standby power mode. The controller continues to hold the clock output at a predefined voltage level and the second latch continues to receive power from the second power line in the standby power mode, thereby retaining the data input.