Interrupt Generator Control Register, INT_CTRL
The INT_CTRL register starts and stops the generation of interrupts from the interrupt generation trickbox.
See Reset architecture for a complete description of how to set up and use trickbox interrupts. The following table shows the bit assignments for the INT_CTRL register. If the interrupt generator is not present, then this register is RAZ/WI.
Enables automatic generation of interrupts at regular intervals:
Enable interrupts from the interrupt trickbox:
The timer that controls automatic assertion of interrupts runs when all the following are true:
- INT_CTRL.ENABLE is HIGH.
- INT_CTRL.TIMER_EN is HIGH.
- Additional interrupts are available for generation, indicated by INT_NUMER.SATURATED being LOW.
If any of the above conditions are not met, then the timer does not run and interrupts are not asserted automatically. When the timer is paused because INT_CTRL.ENABLE is LOW or INT_CTRL.TIMER_EN is LOW, it resumes from its previous position when the appropriate enable is set HIGH.
If the timer is halted because no additional interrupts are available for generation, the timer can only start again when all the interrupts are acknowledged using the INT_ACK register.