19.6.2.1 Initialization
The EIC must be initialized in the
following order:
- Enable CLK_EIC_APB
- If edge detection or filtering is required, GCLK_EIC must be enabled
- Write the EIC configuration registers (EVCTRL, WAKEUP, CONFIGy)
- Enable the EIC
To use NMI, GCLK_EIC must be enabled after EIC configuration (NMICTRL).