Datasheet

54
42023GS–SAM–03/2014
ATSAM4L8/L4/L2
Figure 6-6. Supply Monitor Schematic
6.4.1 Power-on-Reset on VDDANA
POR33 monitors VDDANA. It is always activated and monitors voltage at startup but also during
all the Power Save Mode. If VDDANA goes below the threshold voltage, the entire chip is reset.
6.4.2 Brownout Detector on VDDANA
BOD33 monitors VDDANA. Refer to Section 15. ”Backup System Control Interface (BSCIF)” on
page 308to get more details.
6.4.3 Power-on-Reset on VDDCORE
POR18 monitors the internal VDDCORE. Refer to Section 15. ”Backup System Control Interface
(BSCIF)” on page 308 to get more details.
6.4.4 Brownout Detector on VDDCORE
Once the device is startup, the BOD18 monitors the internal VDDCORE. Refer to Section 15.
”Backup System Control Interface (BSCIF)” on page 308 to get more details.
POR33
BOD33
BOD18
VDDANA GNDANA
VDDANA
POR18
DUAL OUTPUT
TRIMMABLE
VOLTAGE
REGULATOR
VDDCORE