Resource access in a microcontroller

US12137081B2 · kind B2 · utility

Assignee

• TEXAS INSTRUMENTS INCORPORATED · US

Inventors

• Robin Osa Hoel · Maridalen, NO
• Eric Peeters · Frisco, US
• Prithvi Shankar Yeyyadi Anantha · Kanchinakote, IN
• Aniruddha Periyapatna Nagendra · Kanchinakote, IN
• Shobhit Singhal · Bengaluru, IN
• Ruchi Shankar · Bengaluru, IN
• Prachi Mishra · Ahmedabad, IN

Key dates

• Filing date: Sep 9, 2021
• Grant date: Nov 5, 2024
• Expiry date: Jan 6, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F2213/40
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A microcontroller is provided and comprises a central repository, a processing device, and a firewall. Rule repository memory in the central repository stores one or more access rules defining an access permission of a software context to one or more target resources of the microcontroller. The firewall receives a bus transaction initiated based on an instruction and determines whether any access rule stored in memory of the firewall defines the access permission of the software context to a destination resource. If no access rule stored in the firewall memory defines the access permission, the firewall communicates a miss query condition to the central repository. The central repository searches the rule repository memory for an access rule defining the access permission of the software context to the destination resource, and if a related access rule is found, the related access rule is stored in the firewall memory.