A secure , field upgradeable operating system architecture for Blackfin Microprocessors a

Analog Devices’ Blackfin processors implement a very flexible instruction set architecture geared for both control and signal processing applications. With dual MACs, a Memory Management Unit (MMU), and a control friendly instruction set, this is truly a flexible microprocessor. In particular, the inclusion of an MMU in a low cost, high performance processor with automotive peripherals has lead to the adoption of Blackfin in many automotive in-cabin applications. Such applications require the ability to upgrade after delivery. This paper will present an architecture that enables secure partitioning and updating of fielded systems with augmented or entirely new features without compromising reliability or security of the existing