Interrupts

The TRNG has the following interrupt source:

• Data Ready (DATARDY): Indicates that a new random number is available in the DATA register and ready to be read.

  This interrupt is a synchronous wake-up source. See Sleep Mode Controller for details.

The interrupt source has an interrupt flag associated with it. The interrupt flag in the Interrupt Flag Status and Clear register (INTFLAG.DATARDY) is set to ‘1’ when the interrupt condition occurs. The interrupt can be enabled by writing a '1' to the corresponding bit in the Interrupt Enable Set register (INTENSET.DATARDY), and disabled by writing a '1' to the corresponding bit in the Interrupt Enable Clear (INTENCLR) register.

An interrupt request is generated when the interrupt flag is set and the corresponding interrupt is enabled. The interrupt request remains active until the interrupt flag is cleared, or the interrupt is disabled. See INTFLAG for details on how to clear interrupt flags.

Note that interrupts must be globally enabled for interrupt requests to be generated.