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Implementing correct power-up sequence for i.MX6 processors is not a trivial task because several power rails are involved. Axel SOM simplifies this task and embeds all the needed circuitry. The following picture shows a simplified block diagram of PSU/voltage monitoring circuitry:
[[File:AxelUltra-power-sequence.png | 741px800px]]
The PSU is composed of two main blocks:
