Code Corrupted after full discharge of batteries, upon reboot. NRF51822 SDK 12.3

[Robin]

Hello Nordic Wizards,

We are in the final throws of a project preparing to go to market.  However we have identified a "strange" problem.

if the batteries driving the board power are allowed to fully discharge, once they start recharging, plugging/unplugging the board from a charger resets the board and may lock the code up in an unknown state.  If the board is reprogrammed, this condition stops, until the next time the battery/board is fully discharged.  Has anyone see these types of problems with this chip, and/or can you point me to a prospective solution.

Thank you kindly

Robin @ TL

[daviddedwin]

1. Please state the chip markings on the nRF51822
2. You should try this on an additional board if that is possible.
3. Read the flash on the chip after a failure to see if there is any difference before and after the condition occurs, the nrfjprog utility will help you read the chip flash.

[Robin]

Hello David,

I just downloaded the latest command line tools.  There is no nrfjprog in the mix only the latest segger tools. What next?

Thx

Robin @ TL 

[daviddedwin]

If you downloaded, unzipped  and installed the nrf command line tools, you should have the nrfjprog installed.
Make sure that you run the "nRF-Command-Line-Tools_10_13_0_Installer_64.exe" inside the zip file.(this file is for Win64).

Once installed you can run the nrfjprog within a Windows command window (cmd.exe)

[Robin]

Hello David,

I did run the installer.  When I try to run nrfjprog from a cmd window, Windows claims it is not a valid command.  Where is it installed?  Ill run it from that folder.

Tjx agn

R @ TL 

[daviddedwin]

The tools are usually installed in "Program Files (x86)\Nordic Semiconductor\nrf-command-line-tools\bin" 

[Robin]

Hello David,

Interesting, they are there, but the program wont run from command line.  Probably a pathing issue.

Thanks again

Robin @ TL 

[daviddedwin]

Make sure that you have quoted the text like
C:\>"C:\Program Files (x86)\Nordic Semiconductor\nrf-command-line-tools\bin\nrfjprog.exe"

=Added=
If there is an error that you see, please post that as well.