Patent · US Active

Memory access

US11403003B2 · kind B2 · utility

0Cited by

1References

15Claims

0Family size

Assignee

Nordic Semiconductor ASA · NO

Inventors

Hannu Talvitie · Oulu, FI
Marko Winblad · Trondheim, NO

Key dates

Filing date	May 10, 2019
Grant date	Aug 2, 2022
Priority date	—
Expiry date	May 10, 2039

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02D10/00
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

An electronic device comprises a processor operable at a variable processor privilege level and a memory comprising a secure memory area. A hardware module is operable at a variable module privilege level and is arranged to access the memory directly. The secure memory area is accessible by the hardware module only when the module privilege level exceeds a threshold value. The device has a first mode of operation in which said processor privilege level is higher than said threshold value and said module privilege level is lower than said threshold value. A controller is arranged, upon receiving a privilege promotion signal and the device being in the first mode, to move the device to a second mode wherein the module privilege level is higher than said threshold value.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.