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:
May. 16, 2017
Filed:
Apr. 26, 2007
Andrew Dellow, Minchinhampton, GB;
Iue-shuenn Chen, San Diego, CA (US);
Stephane (Steve) Rodgers, San Diego, CA (US);
Xuemin (Sherman) Chen, San Diego, CA (US);
Andrew Dellow, Minchinhampton, GB;
Iue-Shuenn Chen, San Diego, CA (US);
Stephane (Steve) Rodgers, San Diego, CA (US);
Xuemin (Sherman) Chen, San Diego, CA (US);
Avago Technologies General IP (Singapore) Pte. Ltd., Singapore, SG;
Abstract
Aspects of a method and system for allowing no code download in a code download scheme are provided. A system-on-a-chip (SoC) may comprise a security processor, a ROM, and a one-time-programmable (OTP) memory. The security processor may enable fetching code from a restricted function portion of the ROM. The restricted functions may comprise code for booting up the SoC and code that prevents enabling security algorithms within the SoC. The security processor may then enable booting up of at least a portion of the SoC based on the fetched code. The remaining portion of the ROM may comprise code for downloading security code from an external memory, such as a FLASH memory, to an internal memory, such as a RAM, to boot up the SoC. Access to the restricted function portion or the remaining portion of the ROM is based on at least one bit from the OTP memory.