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LPC55S69 : read SecureGPIO state

Question asked by Eugene Hiihtaja on Apr 5, 2020
Latest reply on Apr 8, 2020 by Omar Anguiano

Hi !


Do I understand right :


1. If gpio pin configured as secure GPIO (via IOCON and SecMask ) it can't be used by GINTx peripheral ?

    As result pin can't be used for wakeup MCU from PowerDown low power mode ?

   Secure GPIOs can generate interrupts if they included to PINT peripheral only.


2. For protect reading state of pin it is enough to use SecMask only. IOCON setting is not mandatory ?


3. For protect writing to secure GPIO, IOCON and SecMask should be configured. Is this so ?


4. If pin configured for FLEXCOMM peripheral ( for example SPI SSEL), for protect reading of this kind of pin,

   it is enough for configure SecMask only.


Please clarify those combinations.