21.6.8 Sleep Mode Operation

In sleep modes, an EXTINTx pin can wake up the device if the corresponding condition matches the configuration in CONFIGy register. Writing a one to a Wake-Up Enable bit (WAKEUP.WAKEUPEN[x]) enables the wake-up from pin EXTINTx. Writing a zero to a Wake-Up Enable bit (WAKEUP.WAKEUPEN[x]) disables the wake-up from pin EXTINTx.

Using WAKEUPEN[x]=1 with INTENSET=0 is not recommended.

In sleep modes, an EXTINTx pin can wake up the device if the corresponding condition matches the configuration in CONFIGn register, and the corresponding bit in the Interrupt Enable Set register (INTENSET) is written to '1'. WAKEUP.WAKEUPEN[x]=1 can enable the wake-up from pin EXTINTx.

Figure 21-3. Wake-Up Operation Example (High-Level Detection, No Filter, WAKEUPEN[x]=1)