SYSTEM FOR MANAGING SECURE AND NONSECURE APPLICATIONS ON ONE AND THE SAME MICROCONTROLLER

An electronic microcontroller system including: plural processors; at least one interface for exchange with at least one peripheral, the peripheral being user master of the electronic microcontroller system; a mechanism for access to a shared memory space; an interconnection matrix for interconnecting the exchange interface, the processors and the mechanism for access to a shared memory space; a mechanism managing applications involving a guaranteed level of security and integrity and of applications exhibiting a nonguaranteed level of security and integrity. The exchange interface cooperates with a secure isolation cell of the memory situated between the user master peripheral and the interconnection matrix.