I'm working on a DA9063 Design with an additional external 3.3V Converter.
I added a attachment with a simplified Power Tree and Timing Diagram.
The external 3.3V DC/DC Converter has an Enable and a Power Good Signal.
I want that the DA9063 enables after Startup the 3.3V Enable Signal and waits until the 3.3V PG Signal is given.
After that the DA9063 should start with his own Power Sequencing.
When the 3.3V PG Signal is lost the DA9063 should make a reset and sould restart as before.
Also the 3.3V Regulator should be disabled and restartet again.
To get to this behaviour I planned to use a GPIO as the 3.3V Enable signal and the System_EN is connected to the 3.3V PG Signal.
I thought it would be the right decision to enable the GPIO 3.3V Enable Signal in Sequencer Time Slot 0.
So the DA9063 has to wait until the PG Signal is set and after that starts with his power sequence.
And when the 3.3V Supply fails the PG Signal disables the System_EN which creates a reset.
Is this the right way to realise my intended behaviour?
I'm not shure if at a reset the Slot 0 : 3.3V Enable signal will be toggled so that the 3.3V Supply does also a reset?
Should the 3.3V Enable GPIO "Fall Slot" defined as Slot 1 or is Slot 0 the right one?