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:
Jan. 23, 2024
Filed:
May. 14, 2020
Qualcomm Incorporated, San Diego, CA (US);
Bharat Kumar Rangarajan, Bangalore, IN;
Dipti Ranjan Pal, Irvine, CA (US);
Keith Alan Bowman, Morrisville, NC (US);
Srinivas Turaga, Bangalore, IN;
Ateesh Deepankar De, Bangalore, IN;
Shih-Hsin Jason Hu, San Diego, CA (US);
Chandan Agarwalla, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
A method to prevent a malicious attack on CPU subsystem (CPUSS) hardware is described. The method includes auto-calibrating tunable delay elements of a dynamic variation monitor (DVM) using an auto-calibration value computed in response to each detected change of a clock frequency (Fclk)/supply voltage (Vdd) of the CPUSS hardware. The method also includes comparing the auto-calibration value with a threshold reference calibration value to determine whether the malicious attack is detected. The method further includes forcing a safe clock frequency (Fclk)/safe supply voltage (Vdd) to the CPUSS hardware when the malicious attack is detected.