SAM4CM_14 Datasheet, PDF (396/1177 Pages) ATMEL Corporation – Atmel | SMART ARM-based Flash MCU

The SMS bit generates an interrupt if the SMIEN bit is set in SUPC_SMMR.
Figure 20-2. Supply Monitor Status Bit and Associated Interrupt
Supply Monitor ON
Continuous Sampling (SMSMPL = 1)
Periodic Sampling
3.3 V
Threshold
0V
SMS and SUPC interrupt
Read SUPC_SR
396
SAM4CM Series [DATASHEET]
Atmel-11203C-ATARM-SAM4CM32-SAM4CM16-SAM4CM8-Datasheet_06-Oct-14