SECURE ACCESS IN A MICROCONTROLLER SYSTEM

摘要

Systems, methods and computer-readable mediums are disclosed for providing secure access in a microcontroller system. In some implementations, a microcontroller system comprises a system bus and a secure central processing unit (CPU) coupled to the system bus. The secure CPU is configured to provide secure access to the system bus. A non-secure CPU is also coupled to the system bus and is configured to provide non-secure access to the system bus. A non-secure memory is coupled to the system bus and is configured to allow the secure CPU and the non-secure CPU to exchange data and communicate with each other. A peripheral access controller (PAC) is coupled to the system bus and configured to enable secure access to a peripheral by the secure CPU while disabling non-secure access to the peripheral based upon a non-secure state of the non-secure CPU.

主权项

1. A microcontroller system comprising:
a system bus; a secure central processing unit (CPU) coupled to the system bus, the secure CPU configured to provide secure access to the system bus; a non-secure CPU coupled to the system bus, the non-secure CPU configured to provide non-secure access to the system bus; non-secure memory coupled to the system bus, the non-secure memory configured to allow the secure CPU and the non-secure CPU to exchange data and communicate with each other; and a peripheral access controller (PAC) coupled to the system bus, the PAC configured to enable secure access to a peripheral by the secure CPU while disabling non-secure access to the peripheral based upon a non-secure state of the non-secure CPU.