There is a SAM3U4E on my board. Main voltage is 3.3V.
I can download and debug code over J-Link.
The problem is that MCU does not start after power on until I assert low to NRSTB(pin 141).
I checked the VDDOUT (pin 2).
The voltage level of VDDOUT was about 2.2V after power on.
After I asserted low to NRSTB(pin 141), the voltage level changes to 1.8V and software started.
Please let me know any clue to solve this problem
Discussion around product based on ARM Cortex M3 core.
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