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LPC66S69 : Secure GPIO output

Question asked by Eugene Hiihtaja on Oct 30, 2019
Latest reply on Nov 7, 2019 by Alice_Yang

Hello !


Do I understand right and when GPIO pin from Bank 0 is marked as secure, it is not only not possible to read it state from NonSecure world but also is not possible to set output state ?

in UM it is not so clear about output behaviour.


Idea is to close control access to some GPIO pins what configured as output.

Is this possible ?


By the way what peripheral block of LPC can be use in similar ways like AIPS in K82 ?


I have RTOS tasks what running in nonsecure world with User privileges and I would like to limit set of peripherals

what can be accessed with User privileges . For K82 it was easy to done by using dynamic tables what update AIPSx gates at the same time as MPU tables.


But how in this MCU I can limit access of User task to one FLEXCOMM interface only ?

When task context is in -> eanble access with User privileges , when  out - disable.


Is this possible ?