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KW40Z OTAP safety for no battery devices

Question asked by Lucian Firan on Feb 27, 2017
Latest reply on Mar 15, 2017 by Lucian Firan

KW40Z_Connectivity_Software_1.0.1 (KSDK_1.3.0); IAR 7.50;

As OTAP upload can take from 3 to 5 minutes or more to upload new image software to external SPI flash eeprom, and then 16 seconds to actually update MKW30Z flash from SPI - it is possible to have a power down event.

 

How safe is using the OTAP and bootloader software update in a system tied to direct wall mount power supply ?

What happens if there is a power down event, worst case scenario ?

 

(in battery systems it is easier to check for battery status before updating)

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