21.8.1.1 Interrupt Source Mode
The AIC independently programs each interrupt source. The SRCTYPE field of the Source Mode register (AIC_SMR) selects the interrupt condition of the interrupt source selected by the INTSEL field of the Source Select register (AIC_SSR).
Note: Configuration registers such as AIC_SMR and AIC_SSR return the values corresponding to
the interrupt source selected by INTSEL.
The internal interrupt sources wired on the interrupt outputs of the embedded peripherals can be programmed either in Level-Sensitive mode or in Edge-Triggered mode. The active level of the internal interrupts is not important for the user.
The external interrupt sources can be programmed either in High Level-Sensitive or Low Level-Sensitive modes, or in Rising Edge-Triggered or Negative Edge-Triggered modes.