If the software isn't starting, you will need a hardware solution to reset.
Is anybody else having the same problem?
This is on the first page of the datasheet:
– Embedded voltage regulator for single supply operation
– POR, BOD and Watchdog for safe reset
Maybe the BOD isn't active, ( software would have to disable )?
10.2 Power-on-Reset, Brownout and Supply Monitor
The SAM3X/A embeds three features to monitor, warn and/or reset the chip:
• Power-on-Reset on VDDBU
• Brownout Detector on VDDCORE
• Supply Monitor on VDDUTMI
10.2.1 Power-on-Reset on VDDBU
The Power-on-Reset monitors VDDBU. It is always activated and monitors voltage at start up
but also during power down. If VDDBU goes below the threshold voltage, the entire chip is reset.
For more information, refer to the “Electrical Characteristics” section of the product datasheet.
10.2.2 Brownout Detector on VDDCORE
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” and “Electrical Characteristics” sections of the product
datasheet.
10.2.3 Supply Monitor on VDDUTMI
The Supply Monitor monitors VDDUTMI. It is not active by default. It can be activated by software
and is fully programmable with 16 steps for the threshold (between 1.9V 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,