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)