ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 292

Manufacturer Part Number

KIT EVAL FOR AT91SAM3U CORTEX

Manufacturer

Processor To Be Evaluated

Data Bus Width

Interface Type

Operating Supply Voltage

Silicon Manufacturer

Core Architecture

Core Sub-architecture

Silicon Core Number

Silicon Family Name

Kit Contents

Board CD Docs

Rohs Compliant

For Use With/related Products

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Manufacturer

Part Number:

Manufacturer:

Figure 19-7. Wake Up Sources

SAM3U Series

Wake Up Sources

Brownout Detector Reset

Falling/Rising

The brownout detector provides the bodcore_in signal to the SUPC which indicates that the volt-

age regulation is operating as programmed. If this signal is lost for longer than 1 slow clock

period while the voltage regulator is enabled, the Supply Controller can assert vddcore_nreset.

This feature is enabled by writing the bit, BODRSTEN (Brownout Detector Reset Enable) to 1 in

the Supply Controller Mode Register (SUPC_MR).

If BODRSTEN is set and the voltage regulation is lost (output voltage of the regulator too low),

the vddcore_nreset signal is asserted for a minimum of 1 slow clock cycle and then released if

bodcore_in has been reactivated. The BODRSTS bit is set in the Supply Controller Status Reg-

ister (SUPC_SR) so that the user can know the source of the last reset.

Until bodcore_in is deactivated, the vddcore_nreset signal remains active.

The wake up events allow the device to exit backup mode. When a wake up event is detected,

the Supply Controller performs a sequence which automatically reenables the core power

6430D–ATARM–25-Mar-11