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# 1.2.2 I2C Bootloader System Level Execution Flow

Bootloader system level execution flow

- The Bootloader code starts executing on a device Reset

- If there are no conditions to enter the Firmware Upgrade mode, the Bootloader starts executing the user application

  - Refer to the Bootloader Trigger Methods for different conditions to enter Firmware Upgrade mode

- The Bootloader performs Flash erase/program operations while in the Firmware Upgrade mode

Rev: G