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:
Aug. 14, 2012
Filed:
Oct. 27, 2006
Michael Priel, Hertzelia, IL;
Asaf Ashkenazi, Austin, TX (US);
Dan Kuzmin, Givat Shmuel, IL;
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A device having a power supply monitoring capabilities, the device includes: a power supply unit; at least one real time clock generator counter adapted to receive a supply voltage from the power supply unit; a fixed value storage circuit that is un-accessible to software executed by a processor; wherein the fixed value storage circuit stores a fixed value; wherein the fixed value includes multiple bits; a volatile storage unit, being accessible to the processor; wherein the volatile storage unit is adapted to: (i) store a reset value after being reset; (ii) receive the fixed value during an initialization state; and (iii) store the fixed value until being reset; wherein the volatile storage unit is designed such that there is a low probability that the reset value equals the fixed value; and a comparator adapted to provide a tamper indication if the fixed value stored at the fixed value storage circuit differs from a value stored at the volatile storage unit.