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  • Case ID: 125782
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unintended flash erase

gorazd

Hi,

we have a nrf51 mounted inside an AC motor housing which we assume is causing an unintended flash erase from time to time (checked with nrfjprog --readcode).

Is this a valid assumption? Are there any solutions for this problem? E.g. shielding the flash chip etc.

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    Additional information: we have a level shifter TCA9406 to communicate with motor over uart which is on 5V. Also, we suspect the flash erase happens after the motor (we dont even start the motor spinning and advertising works just fine up until then) is plugged out which results in capacitors slowly discharging and eventually putting our module into reset. After that the module is dead (flash empty) and the module needs to be reprogrammed to work again.

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    Additional information: we have a level shifter TCA9406 to communicate with motor over uart which is on 5V. Also, we suspect the flash erase happens after the motor (we dont even start the motor spinning and advertising works just fine up until then) is plugged out which results in capacitors slowly discharging and eventually putting our module into reset. After that the module is dead (flash empty) and the module needs to be reprogrammed to work again.

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