Undefined state at startup when voltage was below 0.6V

[Rfbeam]

When the supply voltage drops below 0.6V and then get back to 3.3V the nrf51822 starts up in an undefined state and often some flash pages are corrupt after that. Is this behaviour known? We don't have an extern reset circuit but do you know if this issue is resolved if we use one which resets the CPU at e.g. 1.2V? Or is there a new silicon revision without this bug? We can't make sure that the supply voltage don't drop under this voltage because we use the CPU in a battery device where the battery has to be changed and we don't know how long the user needs to change the battery.

[Kenneth]

Hi, we need more information that would allow us to find exact cause, please create a case on My Page and add the following details:

• Schematic and layout.
• A description of test setup.
• Frequency of occurrence and build code.
• Analog capture of VDD, nRESET, DEC1 and DEC2.