Atmel SAM4S-XPLD Atmel ATSAM4S-XPLD ATSAM4S-XPLD Hoja De Datos

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SAM4S [DATASHEET]

11100E–ATARM–24-Jul-13

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All the peripherals are in the bit band region and are mapped in the bit band alias region.

The SAM4S embeds three features to monitor, warn and/or reset the chip:

• Power-on-Reset on VDDIO

• Brownout Detector on VDDCORE

• Supply Monitor on VDDIO

The Power-on-Reset monitors VDDIO. It is always activated and monitors voltage at start up but also during power down.
If VDDIO goes below the threshold voltage, the entire chip is reset. For more information, refer to the Electrical
Characteristics section of the datasheet.

The Brownout Detector monitors VDDCORE. It is active by default. It can be deactivated by software through the Supply
Controller (SUPC_MR). It is especially recommended to disable it during low-power modes such as wait or sleep modes.

If VDDCORE goes below the threshold voltage, the reset of the core is asserted. For more information, refer to the
Supply Controller (SUPC) and Electrical Characteristics sections of the datasheet.

The Supply Monitor monitors VDDIO. It is not active by default. It can be activated by software and is fully programmable
with 16 steps for the threshold (between 1.6V to 3.4V). It is controlled by the Supply Controller (SUPC). A sample mode
is possible. It allows to divide the supply monitor power consumption by a factor of up to 2048. For more information,
refer to the SUPC and Electrical Characteristics sections of the datasheet.