The NRST Manager samples the NRST pin at Slow Clock (SCLK) speed and drives this pin low when required by the Reset State Manager. When the line is detected as being low a User Reset is reported to the Reset State Manager. However, the NRST Manager can be programmed not to trigger a reset when NRST is asserted.
The Reset controller can also be programmed to generate an interrupt instead of generating a reset.