SAM4L Datasheet, PDF (46/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

Figure 5-6. Supply Monitor Schematic
ATSAM4L4/L2
VDDANA
DUAL OUTPUT
TRIMMABLE
VOLTAGE
REGULATOR
POR33
BOD33
BOD18
VDDCORE
POR18
VDDANA
GNDANA
5.4.1
5.4.2
5.4.3
5.4.4
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.
Brownout Detector on VDDANA
BOD33 monitors VDDANA. Refer to Section 12. ”Backup System Control Interface (BSCIF)” on
page 154to get more details.
Power-on-Reset on VDDCORE
POR18 monitors the internal VDDCORE. Refer to Section 12. ”Backup System Control Interface
(BSCIF)” on page 154 to get more details.
Brownout Detector on VDDCORE
Once the device is startup, the BOD18 monitors the internal VDDCORE. Refer to Section 12.
”Backup System Control Interface (BSCIF)” on page 154 to get more details.
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